[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
** Tags added: cscc
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Released
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
This bug was fixed in the package linux - 4.15.0-39.42 --- linux (4.15.0-39.42) bionic; urgency=medium * linux: 4.15.0-39.42 -proposed tracker (LP: #1799411) * Linux: insufficient shootdown for paging-structure caches (LP: #1798897) - mm: move tlb_table_flush to tlb_flush_mmu_free - mm/tlb: Remove tlb_remove_table() non-concurrent condition - mm/tlb, x86/mm: Support invalidating TLB caches for RCU_TABLE_FREE - [Config] CONFIG_HAVE_RCU_TABLE_INVALIDATE=y * Ubuntu18.04: GPU total memory is reduced (LP: #1792102) - Revert "powerpc/powernv: Increase memory block size to 1GB on radix" * arm64: snapdragon: reduce boot noise (LP: #1797154) - [Config] arm64: snapdragon: DRM_MSM=m - [Config] arm64: snapdragon: SND*=m - [Config] arm64: snapdragon: disable ARM_SDE_INTERFACE - [Config] arm64: snapdragon: disable DRM_I2C_ADV7511_CEC - [Config] arm64: snapdragon: disable VIDEO_ADV7511, VIDEO_COBALT * [Bionic] CPPC bug fixes (LP: #1796949) - ACPI / CPPC: Update all pr_(debug/err) messages to log the susbspace id - cpufreq: CPPC: Don't set transition_latency - ACPI / CPPC: Fix invalid PCC channel status errors * regression in 'ip --family bridge neigh' since linux v4.12 (LP: #1796748) - rtnetlink: fix rtnl_fdb_dump() for ndmsg header * screen displays abnormally on the lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca, 1002:15dd) (LP: #1796786) - drm/amd/display: Fix takover from VGA mode - drm/amd/display: early return if not in vga mode in disable_vga - drm/amd/display: Refine disable VGA * arm64: snapdragon: WARNING: CPU: 0 PID: 1 arch/arm64/kernel/setup.c:271 reserve_memblock_reserved_regions (LP: #1797139) - SAUCE: arm64: Fix /proc/iomem for reserved but not memory regions * The front MIC can't work on the Lenovo M715 (LP: #1797292) - ALSA: hda/realtek - Fix the problem of the front MIC on the Lenovo M715 * Keyboard backlight sysfs sometimes is missing on Dell laptops (LP: #1797304) - platform/x86: dell-smbios: Correct some style warnings - platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base - platform/x86: dell-smbios: Link all dell-smbios-* modules together - [Config] CONFIG_DELL_SMBIOS_SMM=y, CONFIG_DELL_SMBIOS_WMI=y * rpi3b+: ethernet not working (LP: #1797406) - lan78xx: Don't reset the interface on open * 87cdf3148b11 was never backported to 4.15 (LP: #1795653) - xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto * [Ubuntu18.04][Power9][DD2.2]package installation segfaults inside debian chroot env in P9 KVM guest with HTM enabled (kvm) (LP: #1792501) - KVM: PPC: Book3S HV: Fix guest r11 corruption with POWER9 TM workarounds * Provide mode where all vCPUs on a core must be the same VM (LP: #1792957) - KVM: PPC: Book3S HV: Provide mode where all vCPUs on a core must be the same VM * fscache: bad refcounting in fscache_op_complete leads to OOPS (LP: #1797314) - SAUCE: fscache: Fix race in decrementing refcount of op->npages * CVE-2018-9363 - Bluetooth: hidp: buffer overflow in hidp_process_report * CVE-2017-13168 - scsi: sg: mitigate read/write abuse * [Bionic] ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set (LP: #1797200) - ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set * [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection (LP: #1797202) - arm64: topology: Avoid checking numa mask for scheduler MC selection * crypto/vmx - Backport of Fix sleep-in-atomic bugs patch for 18.04 (LP: #1790832) - crypto: vmx - Fix sleep-in-atomic bugs * hns3: autoneg settings get lost on down/up (LP: #1797654) - net: hns3: Fix for information of phydev lost problem when down/up * not able to unwind the stack from within __kernel_clock_gettime in the Linux vDSO (LP: #1797963) - powerpc/vdso: Correct call frame information * Signal 7 error when running GPFS tracing in cluster (LP: #1792195) - powerpc/mm/books3s: Add new pte bit to mark pte temporarily invalid. - powerpc/mm/radix: Only need the Nest MMU workaround for R -> RW transition * Support Edge Gateway's WIFI LED (LP: #1798330) - SAUCE: mwifiex: Switch WiFi LED state according to the device status * Support Edge Gateway's Bluetooth LED (LP: #1798332) - SAUCE: Bluetooth: Support for LED on Edge Gateways * USB cardreader (0bda:0328) make the system can't enter s3 or hang (LP: #1798328) - usb: Don't disable Latency tolerance Messaging (LTM) before port reset * CVE-2018-15471 - xen-netback: fix input validation in xenvif_set_hash_mapping() * CVE-2018-16658 - cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status * [Bionic] Update ThunderX2 implementation defined pmu core events (LP: #1796904) - perf vendor events arm64: Update ThunderX2
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
Executed the test case with -proposed Bionic kernel. No system hang or
crash was observed. On Cavium CN99XX Thunder X2 system.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verification-needed-bionic' to 'verification-failed-
bionic'.
If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!
** Tags added: verification-needed-bionic
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
In Progress
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1797202] Re: [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC selection
** Description changed:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
+ -- testcase --
+
+ #!/bin/bash
+
+ stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
+ pid=$!
+
+ for i in {1..210}; do
+ num=$((RANDOM%10+$i))
+ echo "Offline CPU $num"
+ echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
+ sleep 3s
+ echo "Online CPU $num"
+ echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
+ done
+
+ kill -9 $pid
+
+ Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
+ Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797202
Title:
[Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
The numa mask subset check can often lead to system hang or crash during CPU
hotplug and system suspend operation if NUMA is disabled. This is mostly
observed on HMP systems where the CPU compute capacities are different and ends
up in different scheduler domains. Since cpumask_of_node is returned instead
core_sibling, the scheduler is confused with incorrect cpumasks(e.g. one CPU in
two different sched domains at the same time) on CPU hotplug.
[Fix]
The following patch fixes this issue:
e156ab71a974 arm64: topology: Avoid checking numa mask for scheduler MC
selection
[Test]
-- testcase --
#!/bin/bash
stress-ng -q --vm 100 --vm-bytes 1G --cpu 210 --timeout 2400s --metrics-brief
&
pid=$!
for i in {1..210}; do
num=$((RANDOM%10+$i))
echo "Offline CPU $num"
echo 0 > /sys/devices/system/cpu/cpu$num/online || exit 1
sleep 3s
echo "Online CPU $num"
echo 1 > /sys/devices/system/cpu/cpu$num/online || exit 1
done
kill -9 $pid
Executed the test case with stock Bionic kernel and with Bionic kernel with
patches applied. No system hang or crash was observed. On Cavium CN99XX Thunder
X2 system.
[Regression Potential]
Regression tested on Cavium Thunder X2 CN99XX system, and none were found.
Regression risk is low.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797202/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
