[Bug 1921211] Re: Taking a memory dump of user mode process on Xenial hosts causes bugcheck/kernel panic and core dump

2021-05-04 Thread Marcelo Cerri
I verified the version in esm-proposed fixes the issue. I used the
following steps to verify it:

Using a Xenial VM with >2GB of memory (that's a requirement of the mysql
server docker we are using):

$ sudo apt install docker.io gdb
$ sudo docker pull mcr.microsoft.com/mssql/server:2019-latest
$ sudo docker run -e "ACCEPT_EULA=Y" -e "SA_PASSWORD=" -p 
1433:1433 --name sql1 -h sql1 -d mcr.microsoft.com/mssql/server:2019-latest
$ sudo ps -ef | grep sql # get the pid
$ sudo gdb -p PID
(gdb) generate-core-file ./core

With 4.4.0-210.242 I get a kernel bug.
With 4.4.0-211.243 it either succeeds or oomkiller kicks in if memory is not 
enough.

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Title:
  Taking a memory dump of user mode process on Xenial hosts causes
  bugcheck/kernel panic and core dump

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[Bug 1821906] Re: debug in ubuntu_kvm_unit_test failed on 3.13 / 4.4

2021-04-12 Thread Marcelo Cerri
Also seen in xenial linux-fips 4.4.0-1060.66 for sru-20210315 (also in
sru-20200222)

** Tags added: fips sru-20210315

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  debug in ubuntu_kvm_unit_test failed on 3.13 / 4.4

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[Bug 1897764] Re: mem-on-off-test.sh from memory-hotplug in ubuntu_kernel_selftests failed on X-gcp-4.15 / F-5.4 zVM

2021-04-12 Thread Marcelo Cerri
Also seen in xenial linux-fips 4.4.0-1060.66 for sru-20210315

** Tags added: 4.4 fips ppc64el

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  mem-on-off-test.sh from memory-hotplug in ubuntu_kernel_selftests
  failed on X-gcp-4.15 / F-5.4 zVM

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[Bug 1784535] Re: ubuntu_quota_smoke_test failed with KVM kernel

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315
(sru-20210222 as well)

** Also affects: linux-gcp (Ubuntu)
   Importance: Undecided
   Status: New

** Tags added: gcp-fips

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  ubuntu_quota_smoke_test failed with KVM kernel

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[Bug 1829995] Re: getaddrinfo_01 from ipv6_lib test suite in LTP failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315
(sru-20210222 as well)

** Tags added: gcp-fips

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  getaddrinfo_01 from ipv6_lib test suite in LTP failed

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[Bug 1923049] Re: autotest.ubuntu_ltp_stable dio fails on focal:linux-gcp 5.4

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315 (seen
for sru-20210222 as well)

** Tags added: 4.15 bionic gcp-fips kqa-blocker ubuntu-ltp-stable

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Title:
  autotest.ubuntu_ltp_stable dio fails on focal:linux-gcp 5.4

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[Bug 1829849] Re: proc01 in fs from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315
(sru-20210222 as well)

** Tags added: gcp-fips

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Title:
  proc01 in fs from ubuntu_ltp failed

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[Bug 1874703] Re: ubuntu_fan_smoke_test failed with unknown underlay network format on B-GKE-5.0 / G-GCP-5.8

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315 (seen
in previous versions as well).

** Tags added: 4.15 gcp-fips sru-20210315

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  ubuntu_fan_smoke_test failed with unknown underlay network format on
  B-GKE-5.0 / G-GCP-5.8

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[Bug 1839912] Re: test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not in ESTABLISHED"

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-gcp-fips 4.15.0-2007.8 for sru-20210315

** Tags added: gcp-fips

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Title:
  test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not
  in ESTABLISHED"

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[Bug 1748103] Re: apic test in kvm-unit-test failed with timeout

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-azure-fips 4.15.0-2024.27 for sru-20210315

** Tags removed: uec-imagessru-20210315
** Tags added: azure-fips sru-20210315 uec-images

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Title:
  apic test in kvm-unit-test failed with timeout

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[Bug 1839912] Re: test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not in ESTABLISHED"

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-azure-fips 4.15.0-2024.27 for sru-20210315

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  test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not
  in ESTABLISHED"

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[Bug 1923114] Re: ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write error: Device or resource busy

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-azure-fips 4.15.0-2024.27 for sru-20210315

** Tags added: azure-fips

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  ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write
  error: Device or resource busy

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[Bug 1829995] Re: getaddrinfo_01 from ipv6_lib test suite in LTP failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-fips 4.15.0-1057.65 for sru-20210315

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  getaddrinfo_01 from ipv6_lib test suite in LTP failed

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[Bug 1837543] Re: crypto_user02 in crypto from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-fips 4.15.0-1057.65 for sru-20210315

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Title:
  crypto_user02 in crypto from ubuntu_ltp failed

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[Bug 1829849] Re: proc01 in fs from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-fips 4.15.0-1057.65 for sru-20210315

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Title:
  proc01 in fs from ubuntu_ltp failed

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[Bug 1829849] Re: proc01 in fs from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Also seen in bionic linux-fips 4.15.0-1057.65 for sru-20210315

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Title:
  proc01 in fs from ubuntu_ltp failed

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[Bug 1783881] Re: ltp-syscalls: msgstress03 / msgstress04 fails because systemd limits number of processes

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29 for cycle sru-20210315
but also for sru-20210222.

** Tags added: sru-20210222

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Title:
  ltp-syscalls: msgstress03 / msgstress04 fails because systemd limits
  number of processes

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[Bug 1916046] Re: cve-2020-29373 in cve from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29 for cycle sru-20210315
but also for sru-20210222.

** Tags added: 5.8 azure sru-20210315

** Tags added: groovy

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Title:
  cve-2020-29373 in cve from ubuntu_ltp failed

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[Bug 1829995] Re: getaddrinfo_01 from ipv6_lib test suite in LTP failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29 for cycle sru-20210315
but also for sru-20210222.

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  getaddrinfo_01 from ipv6_lib test suite in LTP failed

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[Bug 1837543] Re: crypto_user02 in crypto from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29 for cycle sru-20210315
but also for sru-20210222.

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Title:
  crypto_user02 in crypto from ubuntu_ltp failed

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[Bug 1923191] Re: cpuhotplug from ubuntu_ltp failed for cpuhotplug02 cpuhotplug03 cpuhotplug04 cpuhotplug06

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29 for cycle sru-20210315
but also for sru-20210222.

** Tags added: 5.8 groovy

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Title:
  cpuhotplug from ubuntu_ltp failed for  cpuhotplug02 cpuhotplug03
  cpuhotplug04 cpuhotplug06

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[Bug 1829984] Re: memcg_usage_in_bytes from controllers test suite in LTP failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29.

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Title:
  memcg_usage_in_bytes from controllers test suite in LTP failed

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[Bug 1853610] Re: mkfs01_ext3_sh / mkfs01_ext4_sh / nm01_sh from commands test in ubuntu_ltp fails

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29.

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Title:
  mkfs01_ext3_sh / mkfs01_ext4_sh / nm01_sh from commands test in
  ubuntu_ltp fails

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[Bug 1923114] Re: ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write error: Device or resource busy

2021-04-09 Thread Marcelo Cerri
Also seen in linux-azure 5.8.0-1027.29 (and later) for groovy

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Tags added: 5.8 groovy

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  ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write
  error: Device or resource busy

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[Bug 1917609] Re: [Regression] ubuntu_bpf failed to build on Groovy

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure 5.8.0-1027.29.

** Tags added: azure sru-20210315

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  [Regression] ubuntu_bpf failed to build on Groovy

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[Bug 1837543] Re: crypto_user02 in crypto from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure-4.15 4.15.0-1112.125 and its
derivatives.

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Title:
  crypto_user02 in crypto from ubuntu_ltp failed

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[Bug 1923191] Re: cpuhotplug from ubuntu_ltp failed for cpuhotplug02 cpuhotplug03 cpuhotplug04 cpuhotplug06

2021-04-09 Thread Marcelo Cerri
Seen with linux-azure-4.15 4.15.0-1112.125 and its derivatives for cycle
sru-20210315 but also for sru-20210222.

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Title:
  cpuhotplug from ubuntu_ltp failed for  cpuhotplug02 cpuhotplug03
  cpuhotplug04 cpuhotplug06

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[Bug 1829849] Re: proc01 in fs from ubuntu_ltp failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure-4.15 4.15.0-1112.125 and its
derivatives.

** Tags removed: sru-20210222
** Tags added: sru-20210222sru-20210315

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Title:
  proc01 in fs from ubuntu_ltp failed

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[Bug 1829984] Re: memcg_usage_in_bytes from controllers test suite in LTP failed

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure-4.15 4.15.0-1112.125 and its
derivatives.

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Title:
  memcg_usage_in_bytes from controllers test suite in LTP failed

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[Bug 1748103] Re: apic test in kvm-unit-test failed with timeout

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure-4.15 4.15.0-1112.125 and its
derivatives.

** Tags removed: uec-images
** Tags added: uec-imagessru-20210315

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Title:
  apic test in kvm-unit-test failed with timeout

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[Bug 1839912] Re: test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not in ESTABLISHED"

2021-04-09 Thread Marcelo Cerri
Still happening with linux-azure-4.15 4.15.0-1112.125

** Tags added: sru-20210315

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Title:
  test_map in ubuntu_bpf failed with "Allowed update sockmap '0:3' not
  in ESTABLISHED"

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[Bug 1916290] Re: Enforce CONFIG_DRM_BOCHS=m

2021-04-09 Thread Marcelo Cerri
This change doesn't directly affect the final kernel, only the
preparation process of the kernels that derive from it enforcing those
kernel to either enable this config and explicitly disable. I can
confirm the derivatives were forced to update the config or annotations
file for this config so I'm marking this bug as verified.

** Tags removed: verification-needed-bionic verification-needed-focal 
verification-needed-groovy
** Tags added: verification-done-bionic verification-done-focal 
verification-done-groovy

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  Enforce CONFIG_DRM_BOCHS=m

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[Bug 1923114] [NEW] ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write error: Device or resource busy

2021-04-08 Thread Marcelo Cerri
Public bug reported:

Test cpu-hotplug from ubuntu_kernel_selftests failed with bionic:linux-
azure-4.15 running on a Basic A2 with 2 cores (besides other instance
types):

selftests: cpu-on-off-test.sh

pid 28041's current affinity mask: 3
pid 28041's new affinity mask: 1
CPU online/offline summary:
present_cpus = 0-1 present_max = 1
Cpus in online state: 0-1
Cpus in offline state: 0
Limited scope test: one hotplug cpu
(leaves cpu in the original state):
online to offline to online: cpu 1
not ok 1..1 selftests: cpu-on-off-test.sh [FAIL]
./cpu-on-off-test.sh: line 94: echo: write error: Device or resource busy
offline_cpu_expect_success 1: unexpected fail

http://10.246.72.46/4.15.0-1112.124~16.04.1-azure/xenial-linux-azure-
azure-
amd64-4.15.0-Basic_A2-ubuntu_kernel_selftests/ubuntu_kernel_selftests/results/ubuntu_kernel_selftests
.cpu-hotplug/debug/ubuntu_kernel_selftests.cpu-hotplug.DEBUG.html

The problem happens at "autotest-client-tests/ubuntu_kernel_selftests
/cpu-on-off-test.sh" when executing:

echo 0 > $SYSFS/devices/system/cpu/cpu$1/online

** Affects: ubuntu-kernel-tests
 Importance: Undecided
 Status: New

** Affects: linux-azure (Ubuntu)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu)
 Importance: Undecided
 Status: New

** Affects: linux-azure (Ubuntu Trusty)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu Trusty)
 Importance: Undecided
 Status: New

** Affects: linux-azure (Ubuntu Xenial)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu Xenial)
 Importance: Undecided
 Status: New

** Affects: linux-azure (Ubuntu Bionic)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu Bionic)
 Importance: Undecided
 Status: New


** Tags: 4.15 amd64 azure bionic kqa-blocker sru-20210315 trusty 
ubuntu-kernel-selftests xenial

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu)
   Importance: Undecided
   Status: New

** Tags added: 4.15 amd64 azure bionic kqa-blocker sru-20210315 trusty
ubuntu-kernel-selftests xenial

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Title:
  ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write
  error: Device or resource busy

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[Bug 1919154] Re: Enable CONFIG_NO_HZ_FULL on supported architectures

2021-04-07 Thread Marcelo Cerri
https://lists.ubuntu.com/archives/kernel-team/2021-April/118905.html

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Title:
  Enable CONFIG_NO_HZ_FULL on supported architectures

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[Bug 1919154] Re: Enable CONFIG_NO_HZ_FULL on supported architectures

2021-04-07 Thread Marcelo Cerri
** Description changed:

  [Impact]
  
  The CONFIG_NO_HZ_FULL=y Kconfig option causes the kernel to avoid
  sending scheduling-clock interrupts to CPUs with a single runnable task,
  and such CPUs are said to be "adaptive-ticks CPUs".  This is important
  for applications with aggressive real-time response constraints because
  it allows them to improve their worst-case response times by the maximum
  duration of a scheduling-clock interrupt.  It is also important for
  computationally intensive short-iteration workloads:  If any CPU is
  delayed during a given iteration, all the other CPUs will be forced to
  wait idle while the delayed CPU finishes.  Thus, the delay is multiplied
  by one less than the number of CPUs.  In these situations, there is
  again strong motivation to avoid sending scheduling-clock interrupts.
  
  [Test Plan]
  
  In order to verify the change will not cause performance issues in
  context switch we should compare the results for:
  
  ./stress-ng --seq 0 --metrics-brief -t 15
  
  Running on a dedicated machine and with the following services disabled:
  smartd.service, iscsid.service, apport.service, cron.service,
  anacron.timer, apt-daily.timer, apt-daily-upgrade.timer, fstrim.timer,
  logrotate.timer, motd-news.timer, man-db.timer.
  
+ The results didn't show any performance regression:
+ 
+ https://kernel.ubuntu.com/~mhcerri/lp1919154/
+ 
  [Where problems could occur]
  
  Performance degradation might happen for workloads with intensive
  context switching.

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Title:
  Enable CONFIG_NO_HZ_FULL on supported architectures

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[Bug 1921411] Re: linux-azure: Install PMEM modules by default

2021-03-25 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Focal)
   Status: In Progress => Fix Committed

** Changed in: linux-azure (Ubuntu Groovy)
   Status: In Progress => Fix Committed

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: In Progress => Fix Committed

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Title:
  linux-azure: Install PMEM modules by default

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[Bug 1921411] Re: linux-azure: Install PMEM modules by default

2021-03-25 Thread Marcelo Cerri
SRU submission:

https://lists.ubuntu.com/archives/kernel-team/2021-March/118482.html
https://lists.ubuntu.com/archives/kernel-team/2021-March/118483.html
https://lists.ubuntu.com/archives/kernel-team/2021-March/118484.html
https://lists.ubuntu.com/archives/kernel-team/2021-March/118485.html

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Title:
  linux-azure: Install PMEM modules by default

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[Bug 1921411] Re: linux-azure: Install PMEM modules by default

2021-03-25 Thread Marcelo Cerri
** No longer affects: linux-azure (Ubuntu Hirsute)

** No longer affects: linux-azure-4.15 (Ubuntu Hirsute)

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Title:
  linux-azure: Install PMEM modules by default

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[Bug 1921411] [NEW] linux-azure: Install PMEM modules by default

2021-03-25 Thread Marcelo Cerri
Public bug reported:

[Impact]

Some workloads, for example SQL Server, require PMEM support from
different modules for performance reasons. Most of this modules are
included in the linux-modules-extra package but linux-azure doesn't
install it by default.

Move these modules to the linux-modules package so they are installed by
default: nd_blk.ko, nd_pmem.ko, device_dax.ko, dax_hmem.ko, kmem.ko,
dax_pmem.ko, dax_pmem_compat.ko, virtio_pmem.ko , nd_virtio.ko.

(Some modules are not available depending on the kernel version)

[Test Plan]

The modules listed below should be included in the linux-modules package
instead of in the linux-modules-extra package.

[Where problems could occur]

The additional modules shouldn't cause any troubles and in case of
problem they can be blacklisted or removed from linux-modules.

** Affects: linux-azure (Ubuntu)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu)
 Importance: Undecided
 Status: Invalid

** Affects: linux-azure (Ubuntu Bionic)
 Importance: Undecided
 Status: Invalid

** Affects: linux-azure-4.15 (Ubuntu Bionic)
 Importance: High
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure (Ubuntu Focal)
 Importance: High
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure-4.15 (Ubuntu Focal)
 Importance: Undecided
 Status: Invalid

** Affects: linux-azure (Ubuntu Groovy)
 Importance: High
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure-4.15 (Ubuntu Groovy)
 Importance: Undecided
 Status: Invalid

** Affects: linux-azure (Ubuntu Hirsute)
 Importance: Undecided
 Status: New

** Affects: linux-azure-4.15 (Ubuntu Hirsute)
 Importance: Undecided
 Status: Invalid

** Also affects: linux-azure (Ubuntu)
   Importance: Undecided
   Status: New

** No longer affects: linux (Ubuntu)

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Hirsute)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Hirsute)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Hirsute)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
   Importance: Undecided => High

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
   Importance: Undecided => High

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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Title:
  linux-azure: Install PMEM modules by default

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[Bug 1919154] Re: Enable CONFIG_NO_HZ_FULL on supported architectures

2021-03-24 Thread Marcelo Cerri
Results: https://kernel.ubuntu.com/~mhcerri/lp1919154/


** Changed in: linux (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: linux (Ubuntu Focal)
   Status: New => In Progress

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Title:
  Enable CONFIG_NO_HZ_FULL on supported architectures

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[Bug 1921211] Re: Taking a memory dump of user mode process on Xenial hosts causes bugcheck/kernel panic and core dump

2021-03-24 Thread Marcelo Cerri
** Description changed:

  [Impact]
  
  We have some Ubuntu 16.04 hosts (in Hyper-V) being used for testing some 
Ubuntu 20.04 container. As part of the testing we were attempting to take a 
memory dump of a container running SQL Server with Ubuntu 20.04 on the Ubuntu 
16.04 host we started seeing kernel panic and core dump. It started happening 
after a specific Xenial kernel update on the host.
  4.4.0-204-generic - Systems that are crashing
  4.4.0-201-generic - Systems that are able to capture dump
- 
  
  Note from the developer indicates following logging showing up.
  
  Now the following is output right after I attempt to start the dump. (gdb, 
attach ###, generate-core-file /var/opt/mssql/log/rdorr.delme.core)
  
  [Fri Mar 19 20:01:38 2021] systemd-journald[581]: Successfully sent stream 
file descriptor to service manager.
  [Fri Mar 19 20:01:41 2021] cni0: port 9(vethdec5d2b7) entered forwarding state
  [Fri Mar 19 20:02:42 2021] systemd-journald[581]: Successfully sent stream 
file descriptor to service manager.
  [Fri Mar 19 20:03:04 2021] [ cut here ]
  [Fri Mar 19 20:03:04 2021] kernel BUG at 
/build/linux-qlAbvR/linux-4.4.0/mm/memory.c:3214!
  [Fri Mar 19 20:03:04 2021] invalid opcode:  [#1] SMP
  [Fri Mar 19 20:03:04 2021] Modules linked in: veth vxlan ip6_udp_tunnel 
udp_tunnel xt_statistic xt_nat ipt_REJECT nf_reject_ipv4 xt_tcpudp ip_vs_sh 
ip_vs_wrr ip_vs_rr ip_vs libcrc32c ip6table_nat nf_conntrack_ipv6 
nf_defrag_ipv6 nf_nat_ipv6 ip6_tables xt_comment xt_mark xt_conntrack 
ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user 
xfrm_algo xt_addrtype iptable_filter iptable_nat nf_conntrack_ipv4 
nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables br_netfilter 
bridge stp llc aufs overlay nls_utf8 isofs crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper 
cryptd input_leds serio_raw i2c_piix4 hv_balloon hyperv_fb 8250_fintek joydev 
mac_hid autofs4 hid_generic hv_utils hid_hyperv ptp hv_netvsc hid hv_storvsc 
pps_core
  [Fri Mar 19 20:03:04 2021] hyperv_keyboard scsi_transport_fc psmouse 
pata_acpi hv_vmbus floppy fjes
  [Fri Mar 19 20:03:04 2021] CPU: 1 PID: 24869 Comm: gdb Tainted: G W 
4.4.0-204-generic #236-Ubuntu
  [Fri Mar 19 20:03:04 2021] Hardware name: Microsoft Corporation Virtual 
Machine/Virtual Machine, BIOS 090007 05/18/2018
  [Fri Mar 19 20:03:04 2021] task: 880db9229c80 ti: 880d93b9c000 
task.ti: 880d93b9c000
  [Fri Mar 19 20:03:04 2021] RIP: 0010:[] 
[] handle_mm_fault+0x13de/0x1b80
  [Fri Mar 19 20:03:04 2021] RSP: 0018:880d93b9fc28 EFLAGS: 00010246
  [Fri Mar 19 20:03:04 2021] RAX: 0100 RBX:  RCX: 
0120
  [Fri Mar 19 20:03:04 2021] RDX: 880ea635f3e8 RSI: 3000 RDI: 

  [Fri Mar 19 20:03:04 2021] RBP: 880d93b9fce8 R08: 3ff32179a120 R09: 
007d
  [Fri Mar 19 20:03:04 2021] R10: 880003e8 R11: 03e8 R12: 
8800ea672708
  [Fri Mar 19 20:03:04 2021] R13:  R14: 00010247d000 R15: 
8800f27fe400
  [Fri Mar 19 20:03:04 2021] FS: 7fdc26061600() 
GS:88102564() knlGS:
  [Fri Mar 19 20:03:04 2021] CS: 0010 DS:  ES:  CR0: 80050033
  [Fri Mar 19 20:03:04 2021] CR2: 55e3a0011290 CR3: 000d93ba4000 CR4: 
00160670
  [Fri Mar 19 20:03:04 2021] Stack:
  [Fri Mar 19 20:03:04 2021] 81082929 fffd 81082252 
880d93b9fca8
  [Fri Mar 19 20:03:04 2021] 811c7bca 8800f27fe400 00010247d000 
880e74a88090
  [Fri Mar 19 20:03:04 2021] 3a98d7f0 880e0001 880003e8 
0017
  [Fri Mar 19 20:03:04 2021] Call Trace:
  [Fri Mar 19 20:03:04 2021] [] ? mm_access+0x79/0xa0
  [Fri Mar 19 20:03:04 2021] [] ? mmput+0x12/0x130
  [Fri Mar 19 20:03:04 2021] [] ? follow_page_pte+0x1ca/0x3d0
  [Fri Mar 19 20:03:04 2021] [] ? follow_page_mask+0x214/0x3a0
  [Fri Mar 19 20:03:04 2021] [] __get_user_pages+0x130/0x680
  [Fri Mar 19 20:03:04 2021] [] ? path_openat+0x348/0x1360
  [Fri Mar 19 20:03:04 2021] [] get_user_pages+0x34/0x40
  [Fri Mar 19 20:03:04 2021] [] __access_remote_vm+0xe4/0x2d0
  [Fri Mar 19 20:03:04 2021] [] ? 
alloc_pages_current+0x8c/0x110
  [Fri Mar 19 20:03:04 2021] [] access_remote_vm+0x1f/0x30
  [Fri Mar 19 20:03:04 2021] [] mem_rw.isra.16+0xfa/0x190
  [Fri Mar 19 20:03:04 2021] [] mem_read+0x18/0x20
  [Fri Mar 19 20:03:04 2021] [] __vfs_read+0x1b/0x40
  [Fri Mar 19 20:03:04 2021] [] vfs_read+0x86/0x130
  [Fri Mar 19 20:03:04 2021] [] SyS_pread64+0x95/0xb0
  [Fri Mar 19 20:03:04 2021] [] 
entry_SYSCALL_64_fastpath+0x22/0xd0
  [Fri Mar 19 20:03:04 2021] Code: d4 ee ff ff 48 8b 7d 98 89 45 88 e8 2d c7 fd 
ff 8b 45 88 89 c3 e9 be ee ff ff 48 8b bd 70 ff ff ff e8 c7 cf 69 00 e9 ad ee 
ff ff <0f> 0b 4c 89 e7 4c 89 9d 70 ff ff ff e8 f1 c9 00 00 85 c0 4c 8b
  [Fri Mar 19 20:03:04 

[Bug 1921211] [NEW] Taking a memory dump of user mode process on Xenial hosts causes bugcheck/kernel panic and core dump

2021-03-24 Thread Marcelo Cerri
Public bug reported:

[Impact]

We have some Ubuntu 16.04 hosts (in Hyper-V) being used for testing some Ubuntu 
20.04 container. As part of the testing we were attempting to take a memory 
dump of a container running SQL Server with Ubuntu 20.04 on the Ubuntu 16.04 
host we started seeing kernel panic and core dump. It started happening after a 
specific Xenial kernel update on the host.
4.4.0-204-generic - Systems that are crashing
4.4.0-201-generic - Systems that are able to capture dump


Note from the developer indicates following logging showing up.

Now the following is output right after I attempt to start the dump. (gdb, 
attach ###, generate-core-file /var/opt/mssql/log/rdorr.delme.core)

[Fri Mar 19 20:01:38 2021] systemd-journald[581]: Successfully sent stream file 
descriptor to service manager.
[Fri Mar 19 20:01:41 2021] cni0: port 9(vethdec5d2b7) entered forwarding state
[Fri Mar 19 20:02:42 2021] systemd-journald[581]: Successfully sent stream file 
descriptor to service manager.
[Fri Mar 19 20:03:04 2021] [ cut here ]
[Fri Mar 19 20:03:04 2021] kernel BUG at 
/build/linux-qlAbvR/linux-4.4.0/mm/memory.c:3214!
[Fri Mar 19 20:03:04 2021] invalid opcode:  [#1] SMP
[Fri Mar 19 20:03:04 2021] Modules linked in: veth vxlan ip6_udp_tunnel 
udp_tunnel xt_statistic xt_nat ipt_REJECT nf_reject_ipv4 xt_tcpudp ip_vs_sh 
ip_vs_wrr ip_vs_rr ip_vs libcrc32c ip6table_nat nf_conntrack_ipv6 
nf_defrag_ipv6 nf_nat_ipv6 ip6_tables xt_comment xt_mark xt_conntrack 
ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user 
xfrm_algo xt_addrtype iptable_filter iptable_nat nf_conntrack_ipv4 
nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables br_netfilter 
bridge stp llc aufs overlay nls_utf8 isofs crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper 
cryptd input_leds serio_raw i2c_piix4 hv_balloon hyperv_fb 8250_fintek joydev 
mac_hid autofs4 hid_generic hv_utils hid_hyperv ptp hv_netvsc hid hv_storvsc 
pps_core
[Fri Mar 19 20:03:04 2021] hyperv_keyboard scsi_transport_fc psmouse pata_acpi 
hv_vmbus floppy fjes
[Fri Mar 19 20:03:04 2021] CPU: 1 PID: 24869 Comm: gdb Tainted: G W 
4.4.0-204-generic #236-Ubuntu
[Fri Mar 19 20:03:04 2021] Hardware name: Microsoft Corporation Virtual 
Machine/Virtual Machine, BIOS 090007 05/18/2018
[Fri Mar 19 20:03:04 2021] task: 880db9229c80 ti: 880d93b9c000 task.ti: 
880d93b9c000
[Fri Mar 19 20:03:04 2021] RIP: 0010:[] [] 
handle_mm_fault+0x13de/0x1b80
[Fri Mar 19 20:03:04 2021] RSP: 0018:880d93b9fc28 EFLAGS: 00010246
[Fri Mar 19 20:03:04 2021] RAX: 0100 RBX:  RCX: 
0120
[Fri Mar 19 20:03:04 2021] RDX: 880ea635f3e8 RSI: 3000 RDI: 

[Fri Mar 19 20:03:04 2021] RBP: 880d93b9fce8 R08: 3ff32179a120 R09: 
007d
[Fri Mar 19 20:03:04 2021] R10: 880003e8 R11: 03e8 R12: 
8800ea672708
[Fri Mar 19 20:03:04 2021] R13:  R14: 00010247d000 R15: 
8800f27fe400
[Fri Mar 19 20:03:04 2021] FS: 7fdc26061600() GS:88102564() 
knlGS:
[Fri Mar 19 20:03:04 2021] CS: 0010 DS:  ES:  CR0: 80050033
[Fri Mar 19 20:03:04 2021] CR2: 55e3a0011290 CR3: 000d93ba4000 CR4: 
00160670
[Fri Mar 19 20:03:04 2021] Stack:
[Fri Mar 19 20:03:04 2021] 81082929 fffd 81082252 
880d93b9fca8
[Fri Mar 19 20:03:04 2021] 811c7bca 8800f27fe400 00010247d000 
880e74a88090
[Fri Mar 19 20:03:04 2021] 3a98d7f0 880e0001 880003e8 
0017
[Fri Mar 19 20:03:04 2021] Call Trace:
[Fri Mar 19 20:03:04 2021] [] ? mm_access+0x79/0xa0
[Fri Mar 19 20:03:04 2021] [] ? mmput+0x12/0x130
[Fri Mar 19 20:03:04 2021] [] ? follow_page_pte+0x1ca/0x3d0
[Fri Mar 19 20:03:04 2021] [] ? follow_page_mask+0x214/0x3a0
[Fri Mar 19 20:03:04 2021] [] __get_user_pages+0x130/0x680
[Fri Mar 19 20:03:04 2021] [] ? path_openat+0x348/0x1360
[Fri Mar 19 20:03:04 2021] [] get_user_pages+0x34/0x40
[Fri Mar 19 20:03:04 2021] [] __access_remote_vm+0xe4/0x2d0
[Fri Mar 19 20:03:04 2021] [] ? alloc_pages_current+0x8c/0x110
[Fri Mar 19 20:03:04 2021] [] access_remote_vm+0x1f/0x30
[Fri Mar 19 20:03:04 2021] [] mem_rw.isra.16+0xfa/0x190
[Fri Mar 19 20:03:04 2021] [] mem_read+0x18/0x20
[Fri Mar 19 20:03:04 2021] [] __vfs_read+0x1b/0x40
[Fri Mar 19 20:03:04 2021] [] vfs_read+0x86/0x130
[Fri Mar 19 20:03:04 2021] [] SyS_pread64+0x95/0xb0
[Fri Mar 19 20:03:04 2021] [] 
entry_SYSCALL_64_fastpath+0x22/0xd0
[Fri Mar 19 20:03:04 2021] Code: d4 ee ff ff 48 8b 7d 98 89 45 88 e8 2d c7 fd 
ff 8b 45 88 89 c3 e9 be ee ff ff 48 8b bd 70 ff ff ff e8 c7 cf 69 00 e9 ad ee 
ff ff <0f> 0b 4c 89 e7 4c 89 9d 70 ff ff ff e8 f1 c9 00 00 85 c0 4c 8b
[Fri Mar 19 20:03:04 2021] RIP [] 
handle_mm_fault+0x13de/0x1b80
[Fri Mar 19 20:03:04 2021] RSP 
[Fri Mar 19 20:03:04 2021] ---[ end 

[Bug 1919154] [NEW] Enable CONFIG_NO_HZ_FULL on supported architectures

2021-03-15 Thread Marcelo Cerri
Public bug reported:

[Impact]

The CONFIG_NO_HZ_FULL=y Kconfig option causes the kernel to avoid
sending scheduling-clock interrupts to CPUs with a single runnable task,
and such CPUs are said to be "adaptive-ticks CPUs".  This is important
for applications with aggressive real-time response constraints because
it allows them to improve their worst-case response times by the maximum
duration of a scheduling-clock interrupt.  It is also important for
computationally intensive short-iteration workloads:  If any CPU is
delayed during a given iteration, all the other CPUs will be forced to
wait idle while the delayed CPU finishes.  Thus, the delay is multiplied
by one less than the number of CPUs.  In these situations, there is
again strong motivation to avoid sending scheduling-clock interrupts.

[Test Plan]

In order to verify the change will not cause performance issues in
context switch we should compare the results for:

./stress-ng --seq 0 --metrics-brief -t 15

Running on a dedicated machine and with the following services disabled:
smartd.service, iscsid.service, apport.service, cron.service,
anacron.timer, apt-daily.timer, apt-daily-upgrade.timer, fstrim.timer,
logrotate.timer, motd-news.timer, man-db.timer.

[Where problems could occur]

Performance degradation might happen for workloads with intensive
context switching.

** Affects: linux (Ubuntu)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux (Ubuntu Focal)
 Importance: Undecided
 Status: New

** Affects: linux (Ubuntu Groovy)
 Importance: Undecided
 Status: New

** Affects: linux (Ubuntu Hirsute)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Also affects: linux (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Hirsute)
   Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
   Status: In Progress

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Title:
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[Bug 1917958] Re: Latest linux-generic package (kernel 4.15.0-136) doesn't work on HyperV Gen2 VM

2021-03-12 Thread Marcelo Cerri
Hi, Luiz.

Can you test if the same problem happens with the version in bionic-
proposed?

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Title:
  Latest linux-generic package (kernel 4.15.0-136) doesn't work on
  HyperV Gen2 VM

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[Bug 1908569] Re: video: hyperv_fb: Fix the cache type when mapping the VRAM

2021-03-02 Thread Marcelo Cerri
This fix was already released to -updates via upstream stable updates to
the following Azure kernel versions:

4.15.0-1108.120
5.4.0-1040.42
5.8.0-1023.25


** Changed in: linux-azure (Ubuntu Focal)
   Status: Fix Committed => Fix Released

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

** Changed in: linux-azure (Ubuntu Groovy)
   Status: Fix Committed => Fix Released

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  video: hyperv_fb: Fix the cache type when mapping the VRAM

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-03-01 Thread Marcelo Cerri
Hi, Łukasz.

I believe they were passing simply because the DKMS tests weren't being
triggered. Those past tests were run with the old version of dkms-
autopkgtest (from dkms) and thus only binary packages with names ending
with "-dkms" were tested by it (whick is not the case for virtualbox-
hwe).

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  dkms-autopkgtest: Also select binary packages that depends on dkms for
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[Bug 1916290] [NEW] Enforce CONFIG_DRM_BOCHS=m

2021-02-19 Thread Marcelo Cerri
Public bug reported:

[Impact]

In LP:#1872863 we started to build and ship the bochs-drm.ko driver again, 
however this config wasn't enforced and because of that derivatives didn't 
inherit.

We should enforce CONFIG_DRM_BOCHS=m to avoid problem in the future and to let 
the derivatives update their configuration to include it or not.

[Testcase]

This should be a no-op for bionic:linux causing no differences for the
current kernel. For derivatives, it will prompt the kernel engineer to
update the config or to annotate it.

[Regression Potential]

Since it's no-op, there's no regression potential.

** Affects: linux (Ubuntu)
 Importance: Medium
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux (Ubuntu Bionic)
 Importance: Undecided
 Status: New

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
   Status: New

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  Enforce CONFIG_DRM_BOCHS=m

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-11 Thread Marcelo Cerri
I've attached the debdiff with the fix for all the necessary series, but
the source packages are also available at:

https://kernel.ubuntu.com/~mhcerri/4review/lp1915051/

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  dkms-autopkgtest: Also select binary packages that depends on dkms for
  testing

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-11 Thread Marcelo Cerri
** Patch added: "dkms_2.8.1-5ubuntu2.debdiff (focal)"
   
https://bugs.launchpad.net/ubuntu/+source/dkms/+bug/1915051/+attachment/5462711/+files/dkms_2.8.1-5ubuntu2.debdiff

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Title:
  dkms-autopkgtest: Also select binary packages that depends on dkms for
  testing

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-11 Thread Marcelo Cerri
** Patch added: "dkms_2.8.3-4ubuntu1.debdiff (groovy)"
   
https://bugs.launchpad.net/ubuntu/+source/dkms/+bug/1915051/+attachment/5462710/+files/dkms_2.8.3-4ubuntu1.debdiff

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  testing

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-11 Thread Marcelo Cerri
** Patch added: "dkms_2.8.4-1ubuntu1.debdiff (hirsute)"
   
https://bugs.launchpad.net/ubuntu/+source/dkms/+bug/1915051/+attachment/5462709/+files/dkms_2.8.4-1ubuntu1.debdiff

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  dkms-autopkgtest: Also select binary packages that depends on dkms for
  testing

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-11 Thread Marcelo Cerri
In bionic, `dkms-autopkgtest` doesn't restrict binary packages by name
and thus the fix is only necessary for focal and newer series.

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[Bug 1915146] [NEW] Backport commits required for confidential VMs

2021-02-09 Thread Marcelo Cerri
Public bug reported:

Below are two sets of commits required for CVM:

1. Core enablement of Linux to run as a Hyper-V guest with the SNP-enabled HCL.
2. VMbus hardening.

Patches related to core enablement of Linux to run as a Hyper-V guest
with the SNP-enabled HCL are below:

HV/Storvsc: Add bounce buffer support for Storvsc -
https://github.com/lantianyu/linux/commit/c46341863ba7cfaa11ed6c95d454769dcde57b84

HV/Netvsc: Add SNP support for netvsc driver -
https://github.com/lantianyu/linux/commit/0026626dbc42bfcbe26d993bec104383f9d60e35

x86/Hyper-V: Copy data from/to bounce buffer during IO operation -
https://github.com/lantianyu/linux/commit/5f948e69f2be44891af03d60b918a3bc0845f954

x86/Hyper-V: Add new parameter for
vmbus_sendpacket_pagebuffer()/mpb_desc() -
https://github.com/lantianyu/linux/commit/b484eebaf79340e29012a2dadb4518fa7d5d1284

x86/Hyper-V: Initialize bounce buffer page cache and list -
https://github.com/lantianyu/linux/commit/8a437af5e4af945b28ba0071302dfa28a48df408

hv/vmbus: Initialize VMbus ring buffer for Isolated VM -
https://github.com/lantianyu/linux/commit/45de7cff82cd6e99aedbd4cf2c44fa30298c0dea

HV/Vmbus: Add SNP support for VMbus channel initiate message -
https://github.com/lantianyu/linux/commit/4bca8b9748dd17fb860a4528781932ade1825dd5

HV: Add ghcb hvcall support for SNP VM -
https://github.com/lantianyu/linux/commit/bfb44533b884b08b639258f7150aa71dc148e221

HV: Add Write/Read MSR registers via ghcb -
https://github.com/lantianyu/linux/commit/8cf6a0dea3189a654c41e16ad859c9ceb5bb940c

HV: Get Hyper-V Isolated VM capability -
https://github.com/lantianyu/linux/commit/9290189014a1b231f70b5620338d61508da673df

x86/Hyper-V: Add new hvcall guest address host visibility support -
https://github.com/lantianyu/linux/commit/deb6dc9bdbff7a6b16910ebe9aff266de9690cb2

x86/Hyper-V: Add visibility parameter for vmbus_establish_gpadl() -
https://github.com/lantianyu/linux/commit/e697bc57e853f058eef9b2268b865aa8e574e233

The following commit is also required by CVM support. It has been upstreamed. 
If ubuntu kernel doesn't contain the patch, it's necessary to backport the 
patch.
x86/hyperv: Initialize clockevents earlier in CPU onlining - 
https://github.com/lantianyu/linux/commit/8815c2eec402080a4c5f2536668f6d5b7946ef8b

VMbus hardening patches:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a76566595bfb242a7f4bedc77233e9194831ba3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=44144185951a0ff9b50bf21c0cd1f79ff688e5ca
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8b7db38449ac5b950a3f00519171c4be3e226ff
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=453de21c2b8281228173a7b689120b92929743d6
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d18fcc95f50950a99bd940d4e61a983f91d267a

https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?id=ab548fd21e1cbe601ce5f775254a6d042c6495f2
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?id=244808e0302953de11dba1f8a580cdd1df35843d
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?id=91b1b640b834b2d6f330baf04c0cc049eca9d689

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=206ad34d52a2f1205c84d08c12fc116aad0eb407

https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=4424a8d1acc0a30542d4399e83c2a6cfcdd1eb71
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=6809ea1c570b40c9b2f139684784d6318d958011

https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=46011a70c1c21a5dba02b38edeac16e667544361
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=5c0c26e7dca8f892cc342213e737494d8fd3384f
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=cbf0eda5de05545754540e0ad3173dca5737742e
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=f844988bde35e491507a1b9b7f84b810464cbf78
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=3f71d6b91e7e6fd594c0c8f18b8a1253fea0e093

https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=0ba35fe91ce34f2d0feff626efd0062dac41781c
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=8190826e75cee9d9c008d24d557ef1ce06f5e3e2
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=e5b180a1dd0cd0a8f8c3576eb032c7afda468dcc
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=5862347fd2b74bc00cd34828afae6dc21206a70a
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=ef6c74ee0d35122fde67f9af3758071374a31482

** Affects: linux-azure (Ubuntu)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-08 Thread Marcelo Cerri
Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982315

** Bug watch added: Debian Bug tracker #982315
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982315

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Title:
  dkms-autopkgtest: Also select binary packages that depends on dkms for
  testing

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[Bug 1915051] Re: dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-08 Thread Marcelo Cerri
** Also affects: dkms (Ubuntu Hirsute)
   Importance: Undecided
   Status: New

** Also affects: dkms (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: dkms (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Changed in: dkms (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: dkms (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: dkms (Ubuntu Hirsute)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: dkms (Ubuntu Focal)
   Status: New => Triaged

** Changed in: dkms (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: dkms (Ubuntu Focal)
   Status: Triaged => In Progress

** Changed in: dkms (Ubuntu Hirsute)
   Status: New => In Progress

** Changed in: dkms (Ubuntu Focal)
   Importance: Undecided => High

** Changed in: dkms (Ubuntu Groovy)
   Importance: Undecided => High

** Changed in: dkms (Ubuntu Hirsute)
   Importance: Undecided => High

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  dkms-autopkgtest: Also select binary packages that depends on dkms for
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[Bug 1915051] [NEW] dkms-autopkgtest: Also select binary packages that depends on dkms for testing

2021-02-08 Thread Marcelo Cerri
Public bug reported:

[Impact]

The current version of dkms-autopkgtest in 20.04 and later only selects
binary packages with names ending with "-dkms" for its automatic DKMS
test. With that packages suchs bcml-kernel-source and nvidia drivers are
not being tested automatically by autopkgtest.

[Test Case]

Run autopkgtest in Focal for bcmwl-kernel-source (6.30.223.271+bdcom-
0ubuntu5) and the 5.8 kernel and even with this version of the driver
failing to build with the 5.8 kernel, the test succeeds. The expected
behavior, is that that dkms-autopkgtest should fail in this case.

[Where problems could occur]

The main issue that we can have here is selecting additional packages
for the DKMS test that are not DKMS packages.

** Affects: dkms (Ubuntu)
 Importance: Undecided
 Status: New

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[Bug 1911438] Re: CIFS: Request for backport

2021-02-02 Thread Marcelo Cerri
** Description changed:

  [Impact]
  
  Microsoft CIFS team requested below patches to be backported (it was
  marked for stable last month) to Ubuntu 18.04 and newer.
  
  6988a619f5b7 "cifs: allow syscalls to be restarted in __smb_send_rqst()"
- 2659d3bff3e1 cifs: fix interrupted close commands
+ 2659d3bff3e1 "cifs: fix interrupted close commands"
+ 214a5ea081e7 "cifs: do not fail __smb_send_rqst if non-fatal signals are 
pending"
  
  Since 6988a619f5b79e4efadea6e19dcfe75fbcd350b5 hasn't been picked up for
  5.4.0-1031-azure (the current 18.04 kernel version for Azure image), I
  would like make a request for backport.
  
  [Test Case]
  
  Since those are small improvements a basic smoke test can be used to
  avoid regressions:
  
  1. Install cifs-utils and dbench:
  
-   $ sudo apt-get install cifs-utils dbench
+   $ sudo apt-get install cifs-utils dbench
  
  2. Mount a CIFS share using:
  
-$ sudo mount -t cifs -o username=REMOTEUSER
+    $ sudo mount -t cifs -o username=REMOTEUSER
  \\remoteip\path\to\shared\folder /mnt
  
  3. Run dbench and check for regressions:
  
-$ cd /mnt; dbench 20 -t 120 -D .
+    $ cd /mnt; dbench 20 -t 120 -D .
  
  [Where problems could occur]
  
  The regression potential is restricted to the ability of mounting and
  accessing CIFS volumes.

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[Bug 1878045] Re: doing dist-upgrade got error related do Broadcom

2021-02-01 Thread Marcelo Cerri
** Changed in: bcmwl (Ubuntu Focal)
   Status: In Progress => Invalid

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  doing dist-upgrade got error related do Broadcom

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[Bug 1878045] Re: doing dist-upgrade got error related do Broadcom

2021-02-01 Thread Marcelo Cerri
** Changed in: bcmwl (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Patch added: "debdiff for Focal"
   
https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1878045/+attachment/5458878/+files/bcmwl_6.30.223.271+bdcom-0ubuntu7~20.04.1.debdiff

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  doing dist-upgrade got error related do Broadcom

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[Bug 1878045] Re: doing dist-upgrade got error related do Broadcom

2021-02-01 Thread Marcelo Cerri
** Also affects: bcmwl (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: bcmwl (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Changed in: bcmwl (Ubuntu Groovy)
   Status: New => Fix Released

** Changed in: bcmwl (Ubuntu Focal)
   Status: New => In Progress

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  doing dist-upgrade got error related do Broadcom

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[Bug 1912066] Re: Roccat ISKU Keyboard not working, Kernel 5.8.x

2021-01-29 Thread Marcelo Cerri
Hi, bathynomusBLUE.

Have you tried to install the NVIDIA drivers manually recently?

I see linux-modules-nvidia-455-generic-hwe-20.04 and linux-modules-
nvidia-460-generic-hwe-20.04 are installed but you don't have linux-
generic-hwe-20.04 installed.

Thank you.

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Title:
  Roccat ISKU Keyboard not working, Kernel 5.8.x

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[Bug 1912960] Re: kcryptd, big file copy, system became unresponsive

2021-01-29 Thread Marcelo Cerri
Hi, Janusz.

Thank you for reporting this bug.

Can you please test if the same problem also happens with the 5.8 hwe
kernel? You can install it with `apt install linux-generic-hwe-20.04`.

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[Bug 1912066] Re: Roccat ISKU Keyboard not working, Kernel 5.8.x

2021-01-27 Thread Marcelo Cerri
Hi, bathynomusBLUE.

Can you send the complete output of `dpkg -l` (instead of grepping by
linux). That should save us some round trips in these requests.

Thanks again!

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  Roccat ISKU Keyboard not working, Kernel 5.8.x

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[Bug 1912066] Re: Roccat ISKU Keyboard not working, Kernel 5.8.x

2021-01-27 Thread Marcelo Cerri
Hi, can you also run the following commands:

apt-cache rdepends --installed linux-image-5.8.0-36-generic
apt-cache rdepends --installed linux-modules-nvidia-460-generic-hwe-20.04

Thank you.

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[Bug 1912066] Re: Roccat ISKU Keyboard not working, Kernel 5.8.x

2021-01-27 Thread Marcelo Cerri
Hi, can you post the output for `dpkg -l | grep linux` in this machine?

Thank you.

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[Bug 1912066] Re: Roccat ISKU Keyboard not working, Kernel 5.8.x

2021-01-26 Thread Marcelo Cerri
Hi! Thanks for all the information.

Can you describe how the 5.8 kernel was installed in this machine?

Is linux-generic-hwe-20.04 or linux-generic-hwe-20.04-edge installed?

Thank you!

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[Bug 1913294] Re: Sync FSGSBASE patches in azure kernel with mainline

2021-01-26 Thread Marcelo Cerri
Submitted to SRU:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116803.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116804.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116805.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116806.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116807.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116808.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116809.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116810.html

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Title:
  Sync FSGSBASE patches in azure kernel with mainline

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[Bug 1913294] [NEW] Sync FSGSBASE patches in azure kernel with mainline

2021-01-26 Thread Marcelo Cerri
Public bug reported:

[Impact]

To include the missing upstream patches to the 4.15 and 5.4 kernel.

* x86/entry/64: Do not use RDPID in paranoid entry to accommodate KVM:
- occasional random failure when running KVM
* x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
- Google folks found this when running their fuzzy test cases. Don't know how 
realistic this can hit.
* x86/fsgsbase: Fix Xen PV support
* x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
- these two are for VMMs.

Some of these are already included in our azure kernels. 5.8 doesn't
need them because we already synced with upstream while preparing it.

[Test Case]

Since we are syncing with mainline a boot test and a regression test in
ACC instances should be enough to confirm the changes are working.

Since these instances are not publicly available yet, Msft is helping us
to test this changes.

[Where problems could occur]

This affects the SGX driver that is only available on ACC instances
(which is not widely used yet).

** Affects: linux-azure (Ubuntu)
 Importance: Medium
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure-4.15 (Ubuntu)
 Importance: Medium
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure (Ubuntu Bionic)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: Invalid

** Affects: linux-azure-4.15 (Ubuntu Bionic)
 Importance: Medium
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure (Ubuntu Focal)
 Importance: Medium
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure-4.15 (Ubuntu Focal)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: Invalid

** Affects: linux-azure (Ubuntu Groovy)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: Invalid

** Affects: linux-azure-4.15 (Ubuntu Groovy)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: Invalid

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: linux-azure (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux-azure-4.15 (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Bionic)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
   Importance: Undecided => Medium

** Description changed:

  [Impact]
  
  To include the missing upstream patches to the 4.15 and 5.4 kernel.
  
  * x86/entry/64: Do not use RDPID in paranoid entry to accommodate KVM:
  - occasional random failure when running KVM
  * x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
  - Google folks found this when running their fuzzy test cases. Don't know how 
realistic this can hit.
  * x86/fsgsbase: Fix Xen PV support
  * x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
  - these two are for VMMs.
  
- (Some of those are already included in our azure kernels)
+ Some of these are already included in our azure kernels. 5.8 doesn

[Bug 1911438] Re: CIFS: Request for backport

2021-01-25 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Focal)
   Importance: Undecided => High

** Changed in: linux-azure (Ubuntu Groovy)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux-azure (Ubuntu)
   Importance: Undecided => High

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Title:
  CIFS: Request for backport

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[Bug 1911438] Re: CIFS: Request for backport

2021-01-25 Thread Marcelo Cerri
SRU submission:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116766.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116767.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116768.html

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Title:
  CIFS: Request for backport

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[Bug 1911438] Re: CIFS: Request for backport

2021-01-25 Thread Marcelo Cerri
5.8 already has the fixes.

** Description changed:

- CIFS team requested below patch to be backported (it was marked for
- stable last month) to Ubuntu 18.04.
+ [Impact]
  
- Patch: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/cifs/transport.c?id=6988a619f5b79e4efadea6e19dcfe75fbcd350b5
- "cifs: allow syscalls to be restarted in __smb_send_rqst()"
+ Microsoft CIFS team requested below patches to be backported (it was
+ marked for stable last month) to Ubuntu 18.04 and newer.
+ 
+ 6988a619f5b7 "cifs: allow syscalls to be restarted in __smb_send_rqst()"
+ 2659d3bff3e1 cifs: fix interrupted close commands
  
  Since 6988a619f5b79e4efadea6e19dcfe75fbcd350b5 hasn't been picked up for
  5.4.0-1031-azure (the current 18.04 kernel version for Azure image), I
  would like make a request for backport.
  
- Please let me know, if you have any questions.
+ [Test Case]
+ 
+ Since those are small improvements a basic smoke test can be used to
+ avoid regressions:
+ 
+ 1. Install cifs-utils and dbench:
+ 
+   $ sudo apt-get install cifs-utils dbench
+ 
+ 2. Mount a CIFS share using:
+ 
+$ sudo mount -t cifs -o username=REMOTEUSER
+ \\remoteip\path\to\shared\folder /mnt
+ 
+ 3. Run dbench and check for regressions:
+ 
+$ cd /mnt; dbench 20 -t 120 -D .
+ 
+ [Where problems could occur]
+ 
+ The regression potential is restricted to the ability of mounting and
+ accessing CIFS volumes.

** Changed in: linux (Ubuntu Groovy)
   Status: Incomplete => Invalid

** Changed in: linux-azure (Ubuntu Groovy)
   Status: In Progress => Invalid

** Changed in: linux (Ubuntu Focal)
   Status: Incomplete => In Progress

** Changed in: linux (Ubuntu Focal)
   Status: In Progress => Won't Fix

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  CIFS: Request for backport

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[Bug 1911438] Re: CIFS: Request for backport

2021-01-25 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Also affects: linux (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1908571] Re: Enable boot from NVMe device for all images

2021-01-19 Thread Marcelo Cerri
Correct! Thanks, Stefan!

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Title:
  Enable boot from NVMe device for all images

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[Bug 1908569] Re: video: hyperv_fb: Fix the cache type when mapping the VRAM

2021-01-18 Thread Marcelo Cerri
SRU submission: https://lists.ubuntu.com/archives/kernel-
team/2021-January/116548.html

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Title:
  video: hyperv_fb: Fix the cache type when mapping the VRAM

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[Bug 1908569] Re: video: hyperv_fb: Fix the cache type when mapping the VRAM

2021-01-18 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

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Title:
  video: hyperv_fb: Fix the cache type when mapping the VRAM

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[Bug 1908569] Re: video: hyperv_fb: Fix the cache type when mapping the VRAM

2021-01-18 Thread Marcelo Cerri
** Description changed:

+ [Impact]
+ 
  We identified a problem that is causing slow logging to the console for
  customers.
  
  The following commit resolves this issue as well as other cache relates 
issues:
  325073ae3485 ("video: hyperv_fb: Fix the cache type when mapping the VRAM")
  
  (marcelo.cerri: it's actually commit id
  5f1251a48c17b54939d7477305e39679a565382c in the mainline kernel)
  
  Patch details from it's commit message:
  
  x86 Hyper-V used to essentially always overwrite the effective cache type
  of guest memory accesses to WB. This was problematic in cases where there
  is a physical device assigned to the VM, since that often requires that
  the VM should have control over cache types. Thus, on newer Hyper-V since
  2018, Hyper-V always honors the VM's cache type, but unexpectedly Linux VM
  users start to complain that Linux VM's VRAM becomes very slow, and it
  turns out that Linux VM should not map the VRAM uncacheable by ioremap().
  Fix this slowness issue by using ioremap_cache().
  
  With this change, the VRAM on new Hyper-V is as fast as regular RAM, so
  it's no longer necessary to use the hacks we added to mitigate the
  slowness, i.e. we no longer need to allocate physical memory and use
  it to back up the VRAM in Generation-1 VM, and we also no longer need to
  allocate physical memory to back up the framebuffer in a Generation-2 VM
  and copy the framebuffer to the real VRAM. A further big change will
  address these for v5.11.
  
  Microsoft would like to request this patch in all supported releases.
+ 
+ [Test Case]
+ 
+ The test is very simple. When using the console in a local Hyper-V
+ instance and running a command with output with several lines (ie `ls -l
+ /`) the output delay is very noticeable and it should be instantaneous
+ with the fix.
+ 
+ [Where problems could occur]
+ 
+ The change might cause regressions in the hyperv_fb driver, affecting
+ one of the alternatives users have to debug problems.

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Title:
  video: hyperv_fb: Fix the cache type when mapping the VRAM

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[Bug 1910866] Re: nvme drive fails after some time

2021-01-15 Thread Marcelo Cerri
Hi, Andrew.

I created a test kernel with the fix and it is available at:

https://kernel.ubuntu.com/~mhcerri/lp1910866_linux-5.8.0-38-generic_5.8.0-38.43+lp1910866_amd64.tar.gz

You can install it by extracting the tarball and installing the debian
packages:

$ tar xf lp1910866_linux-5.8.0-38-generic_5.8.0-38.43+lp1910866_amd64.tar.gz
$ sudo apt install ./*.deb

Please let us know if the test kernel solves the problem.

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Title:
  nvme drive fails after some time

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[Bug 1908264] Re: Disable Atari partition support for cloud kernels

2021-01-15 Thread Marcelo Cerri
I submitted a v2 for the Azure kernels:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116454.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116455.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116456.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116457.html

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Title:
  Disable Atari partition support for cloud kernels

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[Bug 1908264] Re: Disable Atari partition support for cloud kernels

2021-01-14 Thread Marcelo Cerri
SRU submission for the Azure kernels:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116444.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116445.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116446.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116447.html

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Title:
  Disable Atari partition support for cloud kernels

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[Bug 1908264] Re: Disable Atari partition support for cloud kernels

2021-01-14 Thread Marcelo Cerri
** Summary changed:

- Disable Atari partition support for linux-aws
+ Disable Atari partition support for cloud kernels

** Also affects: linux-azure (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Xenial)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Hirsute)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Xenial)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Hirsute)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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  Disable Atari partition support for cloud kernels

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[Bug 1908569] Re: video: hyperv_fb: Fix the cache type when mapping the VRAM

2021-01-13 Thread Marcelo Cerri
** Description changed:

  We identified a problem that is causing slow logging to the console for
  customers.
  
  The following commit resolves this issue as well as other cache relates 
issues:
  325073ae3485 ("video: hyperv_fb: Fix the cache type when mapping the VRAM")
+ 
+ (marcelo.cerri: it's actually commit id
+ 5f1251a48c17b54939d7477305e39679a565382c in the mainline kernel)
  
  Patch details from it's commit message:
  
  x86 Hyper-V used to essentially always overwrite the effective cache type
  of guest memory accesses to WB. This was problematic in cases where there
  is a physical device assigned to the VM, since that often requires that
  the VM should have control over cache types. Thus, on newer Hyper-V since
  2018, Hyper-V always honors the VM's cache type, but unexpectedly Linux VM
  users start to complain that Linux VM's VRAM becomes very slow, and it
  turns out that Linux VM should not map the VRAM uncacheable by ioremap().
  Fix this slowness issue by using ioremap_cache().
  
  With this change, the VRAM on new Hyper-V is as fast as regular RAM, so
  it's no longer necessary to use the hacks we added to mitigate the
  slowness, i.e. we no longer need to allocate physical memory and use
  it to back up the VRAM in Generation-1 VM, and we also no longer need to
  allocate physical memory to back up the framebuffer in a Generation-2 VM
  and copy the framebuffer to the real VRAM. A further big change will
  address these for v5.11.
  
- 
  Microsoft would like to request this patch in all supported releases.

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux-azure-4.15 (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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Title:
  video: hyperv_fb: Fix the cache type when mapping the VRAM

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[Bug 1911438] [NEW] CIFS: Request for backport

2021-01-13 Thread Marcelo Cerri
Public bug reported:

CIFS team requested below patch to be backported (it was marked for
stable last month) to Ubuntu 18.04.

Patch: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/cifs/transport.c?id=6988a619f5b79e4efadea6e19dcfe75fbcd350b5
"cifs: allow syscalls to be restarted in __smb_send_rqst()"

Since 6988a619f5b79e4efadea6e19dcfe75fbcd350b5 hasn't been picked up for
5.4.0-1031-azure (the current 18.04 kernel version for Azure image), I
would like make a request for backport.

Please let me know, if you have any questions.

** Affects: linux-azure (Ubuntu)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: New

** Affects: linux-azure (Ubuntu Focal)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: In Progress

** Affects: linux-azure (Ubuntu Groovy)
 Importance: Undecided
 Assignee: Marcelo Cerri (mhcerri)
 Status: New

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

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Title:
  CIFS: Request for backport

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[Bug 1911205] Re: Revert or drop obsolete patches for PCI

2021-01-12 Thread Marcelo Cerri
** Also affects: linux-azure (Ubuntu)
   Importance: Undecided
   Status: New

** No longer affects: linux (Ubuntu)

** No longer affects: linux (Ubuntu Focal)

** No longer affects: linux (Ubuntu Groovy)

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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Title:
  Revert or drop obsolete patches for PCI

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[Bug 1911205] Re: Revert or drop obsolete patches for PCI

2021-01-12 Thread Marcelo Cerri
SRU submission: https://lists.ubuntu.com/archives/kernel-
team/2021-January/116393.html

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Title:
  Revert or drop obsolete patches for PCI

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[Bug 1911205] [NEW] Revert or drop obsolete patches for PCI

2021-01-12 Thread Marcelo Cerri
Public bug reported:

[Impact]

In both 5.4 and 5.8 kernel, there are two patches in PCI to workaround
an issue with GPU and Infiniband at the time. Those two patches are no
longer necessary in today's Azure environment. Those two patches
introduces bugs to the latest Azure HPC VM SKU.

4.15 kernel is not affected.

Microsoft has regression tested and verified that the following two
patches can be dropped or reverted in 5.4 and 5.8.

5.4 kernel:
Patch 1: Revert "PCI: hv: Make sure the bus domain is really unique"
https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/bionic/commit/drivers/pci/controller/pci-hyperv.c?h=azure-5.4=faf2750396d60001046333bd46eee757bb4cac7b

Patch 2: UBUNTU: SAUCE: pci-hyperv: Use only 16 bit integer for PCI domain
https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/bionic/commit/drivers/pci/controller/pci-hyperv.c?h=azure-5.4=04ac3e06ab708131c1c18cb7db10ca5dd6feedce

5.8 kernel:
Patch 1: Revert "PCI: hv: Make sure the bus domain is really unique"
https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/groovy/commit/drivers/pci/controller/pci-hyperv.c?h=Ubuntu-azure-5.8.0-1016.17=7c85402203e26d4d0474f69b99b5a06ffb765630

Patch 2: UBUNTU: SAUCE: pci-hyperv: Use only 16 bit integer for PCI domain
https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/groovy/commit/drivers/pci/controller/pci-hyperv.c?h=Ubuntu-azure-5.8.0-1016.17=b72f314d15ab0ad7b80b761d8167962300c1bd35

[Test Case]

As per #1816106, instances with multiple GPUs should still be able to
see all of them.

[Where problems could occur]

Issues or oops in instances types with multiple GPUs.

** Affects: linux (Ubuntu)
 Importance: Undecided
     Assignee: Marcelo Cerri (mhcerri)
 Status: New

** Affects: linux (Ubuntu Focal)
 Importance: Undecided
 Status: In Progress

** Affects: linux (Ubuntu Groovy)
 Importance: Undecided
 Status: In Progress

** Also affects: linux (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux (Ubuntu Groovy)
   Status: New => In Progress

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[Bug 1908571] Re: Enable boot from NVMe device for all images

2021-01-12 Thread Marcelo Cerri
SRU submission:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116388.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116389.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116390.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116391.html

** Description changed:

+ [Impact]
+ 
  Azure is planning to have VM sizes that boot from NVMe storage, so the NVMe
  drivers need to be in the kernel image itself, or if the NVMe driver is built
  as a module, the module needs to be included in the initramfs file.   Setting 
CONFIG_HYPERV=Y, CONFIG_PCI_HYPERV=Y and CONFIG_BLK_DEV_NVME=Y does the former, 
but the latter is acceptable.
  
  Two out of the three configs are set to Y, but we would need
  CONFIG_PCI_HYPERV set to Y to build the NVMe driver into the kernel.
  Otherwise, we would need an initrd to all booting from NVMe
  
  Microsoft would like to request either of these changes in all the
  supported releases.
+ 
+ [Test Case]
+ 
+ The .ko file for the module shouldn't be present under
+ "/usr/lib/modules/$(uname -r)/".
+ 
+ But it should still be listed under "/sys/module/" for azure instances.
+ 
+ [Where problems could occur]
+ 
+ There's no outstanding potential regressions from this change. Maybe
+ some bug with the config change itself might affect the kernel
+ packaging, but that's very unlikely.

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Title:
  Enable boot from NVMe device for all images

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[Bug 1908571] Re: Enable boot from NVMe device for all images

2021-01-12 Thread Marcelo Cerri
** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: Invalid => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
   Status: Invalid => In Progress

** Changed in: linux-azure (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure-4.15 (Ubuntu Groovy)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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Title:
  Enable boot from NVMe device for all images

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[Bug 1902531] Re: [linux-azure] IP forwarding issue in netvsc

2020-12-15 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Focal)
   Status: In Progress => Fix Committed

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: In Progress => Fix Committed

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Title:
  [linux-azure] IP forwarding issue in netvsc

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[Bug 1902531] Re: [linux-azure] IP forwarding issue in netvsc

2020-12-14 Thread Marcelo Cerri
** Description changed:

+ [Impact]
+ 
  We identified an issue with the Linux netvsc driver when used in IP
  forwarding mode.  The problem is that the RSS hash value is not
  propagated to the outgoing packet, and so such packets go out on channel
  0.  This produces an imbalance across outgoing channels, and a possible
  overload on the single host-side CPU that is processing channel 0.   The
  problem does not occur when Accelerated Networking is used because the
  packets go out through the Mellanox driver.  Because it is tied to IP
  forwarding, the problem is presumably most likely to be visible in a
  virtual appliance device that is doing network load balancing or other
  kinds of packet filtering and redirection.
  
  We would like to request fixes to this issue in 16.04, 18.04 and 20.04.
  
  Two fixes are already in the upstream v5.5+, so they’re already in
  5.8.0-1011.11.
  
  For 5.4.0-1031.32, the 2 fixes can apply cleanly:
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1fac7ca4e63bf935780cc632ccb6ba8de5f22321
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f3aeb1ba05d41320e6cf9a60f698d9c4e44348e
  
  For 5.0.0-1036.38, we need 1 more patch applied first, so the list is:
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b441f79532ec13dc82d05c55badc4da1f62a6141
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1fac7ca4e63bf935780cc632ccb6ba8de5f22321
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f3aeb1ba05d41320e6cf9a60f698d9c4e44348e
  
  For 4.15.0-1098.109~16.04.1, the 2 patches can not apply cleanly, so Dexuan 
backported them here:
  https://github.com/dcui/linux/commit/4ed58762a56cccfd006e633fac63311176508795
  https://github.com/dcui/linux/commit/40ad7849a6365a5a485f05453e10e3541025e25a
  (The 2 patches are on the branch 
https://github.com/dcui/linux/commits/decui/ubuntu_16.04/linux-azure/Ubuntu-azure-4.15.0-1098.109_16.04.1)
+ 
+ 
+ [Test Case]
+ 
+ As described in https://bugs.launchpad.net/ubuntu/+source/linux-
+ azure/+bug/1902531/comments/6
+ 
+ 
+ [Where problems could occur]
+ 
+ A potential regression would affect Azure instance using netvsc without
+ accelerated networking.

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Title:
  [linux-azure] IP forwarding issue in netvsc

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[Bug 1902531] Re: [linux-azure] IP forwarding issue in netvsc

2020-12-14 Thread Marcelo Cerri
Following the regular SRU, I would expected it to be included to the
next cycle with release date planned for the week of Jan 25. Please, if
you can, let me know today if this date works for you. Thanks!

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  [linux-azure] IP forwarding issue in netvsc

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[Bug 1904458] Re: [linux-azure] Batch hibernate and resume IO requests

2020-12-11 Thread Marcelo Cerri
SRU submission: https://lists.ubuntu.com/archives/kernel-
team/2020-December/115552.html

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Title:
  [linux-azure] Batch hibernate and resume IO requests

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[Bug 1904458] Re: [linux-azure] Batch hibernate and resume IO requests

2020-12-11 Thread Marcelo Cerri
Targeting only 5.4 and 5.8 since 4.15 will not support hibernation.

** No longer affects: linux-azure-4.15 (Ubuntu)

** Also affects: linux-azure (Ubuntu Groovy)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Groovy)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure (Ubuntu Groovy)
   Status: New => In Progress

** Description changed:

+ [Impact]
+ 
  Microsoft would like to request the following upstream commit in all
  releases supported on Azure.  This commit improves a signification delay
  in hibernation/resume:
  
  55c4478a8f0e("PM: hibernate: Batch hibernate and resume IO requests")
- 
  
  Details of this commit:
  Hibernate and resume process submits individual IO requests for each page of 
the data, so use blk_plug to improve the batching of these requests.
  
  Testing this change with hibernate and resumes consistently shows
  merging of the IO requests and more than an order of magnitude
  improvement in hibernate and resume speed is observed.
  
  One hibernate and resume cycle for 16GB RAM out of 32GB in use takes
  around 21 minutes before the change, and 1 minutes after the change on a
  system with limited storage IOPS.
+ 
+ 
+ [Test Case]
+ 
+ Follow the steps described here:
+ 
+ https://bugs.launchpad.net/ubuntu/+source/linux-
+ azure/+bug/1880032/comments/14
+ 
+ And compare the time need to save the instance state.
+ 
+ 
+ [Where problems could occur]
+ 
+ Considering the size of the patch and the code it touches, the most
+ likely issues are related to hibernation itself. Considering the
+ hibernation isn't officially support, any hibernation issues should even
+ considered regressions.

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Title:
  [linux-azure] Batch hibernate and resume IO requests

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[Bug 1904458] Re: [linux-azure] Batch hibernate and resume IO requests

2020-12-11 Thread Marcelo Cerri
I tested the change on Azure using Standard L8s_v2 (8 vcpus, 64 GiB
memory) VMs using the 5.4 linux-azure kernel on bionic and the 5.8
kernel on groovy.

During my tests the VMs continued to successfully hibernate with the
patch and the time needed to save the VM state went down from 25 seconds
to around 3 seconds.

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  [linux-azure] Batch hibernate and resume IO requests

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[Bug 1904458] Re: [linux-azure] Batch hibernate and resume IO requests

2020-12-11 Thread Marcelo Cerri
** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1902531] Re: [linux-azure] IP forwarding issue in netvsc

2020-12-11 Thread Marcelo Cerri
Hi, Joseph.

I've built test kernels for xenial:linux-azure, bionic:linux-azure-4.15
and focal:linux-azure. You can find them at:

https://kernel.ubuntu.com/~mhcerri/azure/lp1902531/

Inside each directory, I included all the kernel .deb files and also a
tarball containing the same .debs. The patches used for each kernel
version is also inside each directory.

Let me know if they work as expected.

Thank you.

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  [linux-azure] IP forwarding issue in netvsc

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[Bug 1904632] Re: Ubuntu 18.04 Azure VM host kernel panic

2020-12-10 Thread Marcelo Cerri
Thanks for reporting the issue, Kaveh.

Do you have more information about the image you are using to create
this Azure host? By your last comment, it doesn't seem the host is
running one of the Ubuntu kernels.

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Title:
  Ubuntu 18.04 Azure VM host kernel panic

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[Bug 1902531] Re: [linux-azure] IP forwarding issue in netvsc

2020-12-10 Thread Marcelo Cerri
** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu Focal)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: linux-azure-4.15 (Ubuntu Bionic)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: linux-azure (Ubuntu Focal)
 Assignee: (unassigned) => Marcelo Cerri (mhcerri)

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https://bugs.launchpad.net/bugs/1902531

Title:
  [linux-azure] IP forwarding issue in netvsc

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[Bug 1896784] Re: Use Azure host for time keeping in all images

2020-12-10 Thread Marcelo Cerri
** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
   Status: New

** Also affects: linux-azure (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: linux-azure-4.15 (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux-azure (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: linux-azure-4.15 (Ubuntu Focal)
   Status: New => Invalid

** Changed in: linux-azure (Ubuntu)
 Assignee: (unassigned) => Kelsey Skunberg (kelsey-skunberg)

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https://bugs.launchpad.net/bugs/1896784

Title:
  Use Azure host for time keeping in all images

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[Bug 1904463] Re: [linux-azure] Fix hibernation in case interrupts are not re-created

2020-12-10 Thread Marcelo Cerri
*** This bug is a duplicate of bug 1894893 ***
https://bugs.launchpad.net/bugs/1894893

** This bug has been marked a duplicate of bug 1894893
   [linux-azure][hibernation] GPU device no longer working after resume from 
hibernation in NV6 VM size

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https://bugs.launchpad.net/bugs/1904463

Title:
  [linux-azure] Fix hibernation in case interrupts are not re-created

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[Bug 1894893] Re: [linux-azure][hibernation] GPU device no longer working after resume from hibernation in NV6 VM size

2020-12-04 Thread Marcelo Cerri
** Changed in: linux-azure (Ubuntu Groovy)
   Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1894893

Title:
  [linux-azure][hibernation] GPU device no longer working after resume
  from hibernation in NV6 VM size

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