[Bug 1665447] Re: kernel ppa is building amd64 files inside mainline ppc64el package

[Breno Leitão]

This continues to be a issue on recent kernel:

These are amd64 files on a ppc64el .deb package:

 /usr/src/linux-headers-4.19.0-041900-generic/scripts/basic/fixdep
 /usr/src/linux-headers-4.19.0-041900-generic/scripts/mod/mk_elfconfig
 /usr/src/linux-headers-4.19.0-041900-generic/scripts/mod/modpost
 /usr/src/linux-headers-4.19.0-041900-generic/scripts/scripts/sign-file

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  kernel ppa is building amd64 files inside mainline ppc64el package

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[Bug 1792957] Re: Provide mode where all vCPUs on a core must be the same VM

[Breno Leitão]

hi Joseph,

I understand this patch will make the next SRU, correct?

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  Provide mode where all vCPUs on a core must be the same VM

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[Bug 1761379] Re: [18.04/18.10] File libperf-jvmti.so is missing in linux-tools-common deb on Ubuntu

[Breno Leitão]

** Changed in: ubuntu-power-systems
   Importance: Medium => High

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  [18.04/18.10] File libperf-jvmti.so is missing in linux-tools-common
  deb on Ubuntu

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[Bug 1792957] Re: Provide mode where all vCPUs on a core must be the same VM

[Breno Leitão]

Hi Joseph,

> I built a test kernel with the requested commit.
> The test kernel can be downloaded from:
> http://kernel.ubuntu.com/~jsalisbury/lp1792957
> 
> Can you test this kernel and see if it resolves this bug?

I tested this kernel in the following scenarios:

 - Booted the host on a P9 machine and started an 18.04 guest using the default 
parameters.
 - Removed the kvm_hv module and reinstalled it using the 'one_vm_per_core' 
parameter, shut down the 18.04 guest and restarted it.

➜  ~ sudo virsh destroy breno-1804
➜  ~ sudo rmmod kvm_hv
➜  ~ sudo modprobe kvm_hv one_vm_per_core=1
➜  ~ sudo virsh start --console breno-1804

On both guests I ran sysbench, as:

breno@ubuntu:~$ sysbench  --threads=16 cpu run
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:

breno@ubuntu:~$ sysbench  --threads=16 cpu run
   Number of threads: 16
   Initializing random number generator from current time
   Prime numbers limit: 1
   Initializing worker threads...
   Threads started!

   CPU speed:
   events per second: 33648.49
   . 

Everything worked fine. I think this patch is good to get accepted.

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[Bug 1786940] Re: Enable arm-linux-gnueabi target on ppc64el toolchain

[Breno Leitão]

Yes. arm-linux-gnueabi is required to compile code for POWER9 BMCs.

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[Bug 1786940] Re: Enable arm-linux-gnueabi target on ppc64el toolchain

[Breno Leitão]

** Summary changed:

- Enable aarch64 target on ppc64el toolchain
+ Enable arm-linux-gnueabi target on ppc64el toolchain

** Description changed:

  Dear Canonical.
  
- We would like to have aarch64 target on ppc64el cross toolchain. This
- would enable us to use a ppc64el host to do cross compilation for
- aarch64.
+ We would like to have arm-linux-gnueabi target on ppc64el cross
+ toolchain. This would enable us to use a ppc64el host to do cross
+ compilation for aarch64.
  
  I talked to Matthias Klose already, and he is aware of this request.
  
  Thank you,
  Breno

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[Bug 1778854] Re: kvm_pr on power9 not loadable

[Breno Leitão]

hi Christian, this is interesting. I tried to reproduce here on my P9
(with cosmic and kernel 4.15.0-22) , but I was not able to:

➜  ~ sudo modprobe kvm_pr

➜  ~ lsmod | grep kvm_pr
kvm_pr107493  0
kvm   225431  1 kvm_pr

➜  ~ uname -a
Linux cosmic 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:12:37 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

➜  ~ cat /proc/cpuinfo | grep model 
model   : IBM pSeries (emulated by qemu)

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  kvm_pr on power9 not loadable

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[Bug 1751994] Re: ppc64el: Support firmware disable of RFI flush

[Breno Leitão]

I also tested the trusty GA kernel:

➜  ~ uname -a
Linux ubuntu140403 3.13.0-142-generic #191~lp1751994 SMP Thu Mar 8 15:49:48 UTC 
2018 ppc64le ppc64le ppc64le GNU/Linux

➜  ~ dmesg | grep rfi
[0.00] rfi-flush: Using fallback displacement flush
[0.00] rfi-flush: patched 9 locations


Thanks for the custom kernels!

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Title:
  ppc64el: Support firmware disable of RFI flush

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[Bug 1751994] Re: ppc64el: Support firmware disable of RFI flush

[Breno Leitão]

I also tested the xenial GA kernel:

#  uname -a
Linux 1604 4.4.0-116-generic #140~lp1751994 SMP Thu Mar 8 15:31:31 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

#  dmesg | grep rfi
[0.00] rfi-flush: Using fallback displacement flush
[0.00] rfi-flush: patched 10 locations

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  ppc64el: Support firmware disable of RFI flush

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[Bug 1751994] Re: ppc64el: Support firmware disable of RFI flush

[Breno Leitão]

I just tested artful and it is working fine:

1604 ➜  ~  uname -a
Linux 1604 4.13.0-36-generic #40~lp1751994 SMP Thu Mar 8 15:19:19 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
1604 ➜  ~  dmesg | grep rfi
[0.00] rfi-flush: Using fallback displacement flush
[0.00] rfi-flush: patched 11 locations

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  ppc64el: Support firmware disable of RFI flush

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[Bug 1772991] Re: [Ubuntu 18.04.1] POWER9 - Nvidia Volta - Kernel changes to enable Nvidia driver on bare metal

[Breno Leitão]

hi Joseph,

I tried to discover if the patchset above was accepted/acked but I
didn't find anything. Do you know if the patchset would make the SRU
criteria?

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  Nvidia driver on bare metal

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[Bug 1773973] Re: Ubuntu 18.04 [ Garrison P8 ]: Machine crashes with oops while booting with 4.15.0-22-generic kernel.

[Breno Leitão]

I think this is a clone of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1773162. Can
someone please test with the following kernel?

http://kernel.ubuntu.com/~jsalisbury/lp1773162

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Title:
  Ubuntu 18.04 [ Garrison P8 ]: Machine crashes with oops while booting
  with 4.15.0-22-generic kernel.

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[Bug 1771813] Re: [Ubuntu 18.10 FEAT] new libocxl library

[Breno Leitão]

Hi Manoj,

This  package is finally in 18.10. How can we proceed to get this
package backported to 18.04 now?

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Title:
  [Ubuntu 18.10 FEAT] new libocxl library

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[Bug 1767927] Re: ISST-LTE:pKVM:Ubuntu1804: rcu_sched self-detected stall on CPU follow by CPU ATTEMPT TO RE-ENTER FIRMWARE!

[Breno Leitão]

Hey Frank,

I understand all of these patches are upstreamed already on Linus' tree
and most of the patches seem to be clean cherry picks (except
15b4dd7981496f51c5f9262a5e0761e48de6655f, which was backported).

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  ISST-LTE:pKVM:Ubuntu1804: rcu_sched self-detected stall on CPU follow
  by CPU ATTEMPT TO RE-ENTER FIRMWARE!

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[Bug 1744173] Re: rfi-flush: Switch to new linear fallback flush

[Breno Leitão]

Hi Juerg,

> When updating to 4.4.117 we reverted a bunch of SAUCE rfi-flush patches and 
> replaced them with the 
> upstream versions. Is there a possibility that your patches are no longer 
> required with those updates?

None of these patches seems to be integrated int 4.4.0-124. So, we will
need to backport them again. I will be working to get this done.

What about artful (kernel 4.13). Are the patches still applying?

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  rfi-flush: Switch to new linear fallback flush

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[Bug 1770003] Re: qla2xxx: Fix page fault at kmem_cache_alloc_node()

[Breno Leitão]

Doug said:

Using kernel from http://kernel.ubuntu.com/~jsalisbury/lp1770003, I have
confirmed that the disks are discovered and I am running some scenarios now.
Doing portdisable/portenable from the FC switch occasionally, while running HTX
I/O load. No problems seen so far.

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  qla2xxx: Fix page fault at kmem_cache_alloc_node()

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[Bug 1770003] Re: qla2xxx: Fix page fault at kmem_cache_alloc_node()

[Breno Leitão]

Hi,

Since Manoj's kernel didn't work, I created a kernel with the fixes
above and it is working on ppc64el (on a 24 hours test).

These are the patches I added:

 scsi: qla2xxx: Fixup locking for session deletion
 scsi: qla2xxx: Fix double free bug after firmware timeout
 scsi: qla2xxx: Prevent relogin trigger from sending too many commands
 scsi: qla2xxx: Fix warning in qla2x00_async_iocb_timeout()
 scsi: qla2xxx: Don't call dma_free_coherent with IRQ disabled.
 scsi: qla2xxx: Serialize session free in qlt_free_session_done
 scsi: qla2xxx: Serialize session deletion by using work_lock
 scsi: qla2xxx: Remove unused argument from qlt_schedule_sess_for_deletion()
 scsi: qla2xxx: Fix session cleanup for N2N

You can find the patches at
https://github.com/leitao/linux/commits/bionic

Is it possible to add these patches in this next SRU?

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[Bug 1770003] Re: qla2xxx: Fix page fault at kmem_cache_alloc_node()

[Breno Leitão]

I also created a vimdiff of both logs, and I noted something that caused
the whole difference later:

On the OK kernel, I see:
   [0001:03:00.0]-001d: : Found an ISP2532 irq 41 iobase 0xdb2a8857.   

On the NOK kernel I see:
   [0001:03:00.0]-001d: : Found an ISP2532 irq 41 iobase 0x6baeaf0e.


Later, The addresses are different again:

OK Kernel:
   [0001:03:00.1]-001d: : Found an ISP2532 irq 42 iobase 0xc67eaba1

NOK Kernel: 
   [0001:03:00.1]-001d: : Found an ISP2532 irq 42 iobase 0x507ae35c

After that, the OK kernel follows with:
   [0001:03:00.0]-580e:2: Asynchronous P2P MODE received
   [0001:03:00.0]-18b9:2: Format 1: VP[0] enabled - status 0 - with port id 
050500.
   [0001:03:00.0]-5875:2: Format 1: Remote WWPN 20:05:00:05:1e:02:da:3e.

While the NOK kernel follows with:
   [0001:03:00.0]-5809:2: LIP occurred (f700)   
 
   [0001:03:00.0]-580c:2: LIP reset occurred (f7f7).

 
Later, when the OK kernel seems to detect something, as:
   [0001:03:00.0]-289f:2: Device wrap (030a00).
   [0001:03:00.0]-28d8:2: qla24xx_fcport_handle_login 50:05:07:68:02:16:5e:37 
DS 0 LS 7 P 0 fl 3 confl
   [0001:03:00.0]-28bd:2: qla24xx_fcport_handle_login 982 
50:05:07:68:02:16:5e:37 post gnl

The NOK kernel just prints:
   [0001:03:00.0]-107ff:2: Async-gpnft hdl=2 FC4Type 8.

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  qla2xxx: Fix page fault at kmem_cache_alloc_node()

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[Bug 1770003] Re: qla2xxx: Fix page fault at kmem_cache_alloc_node()

[Breno Leitão]

Manoj,

Do you have the git tree you used to build this kernel? I would like to
take a look if any backport was missing.

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[Bug 1770003] Re: qla2xxx: Fix page fault at kmem_cache_alloc_node()

[Breno Leitão]

Hi Joseph,

The original patchset just included 4 patches, they are:

d8630bb scsi: qla2xxx: Serialize session deletion by using work_lock
1ae634e scsi: qla2xxx: Serialize session free in qlt_free_session_done
9cd883f scsi: qla2xxx: Fix session cleanup for N2N
eaf75d1 scsi: qla2xxx: Fix double free bug after firmware timeout

The other three patches came as a requirement to backport these 4
patches.

On top of it, the commit id d8630bb95f46 had a regression which would
require the last patch:

1c6cacf scsi: qla2xxx: Fixup locking for session deletion

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[Bug 1744173] Re: artful: rfi-flush: Switch to new linear fallback flush

[Breno Leitão]

Hello Joseph,

Any update on this bug?

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[Bug 1762928] Re: [LTC Test] Ubuntu 18.04: tm_trap_test failed on P8 compat mode guest

[Breno Leitão]

Joseph, Thanks for the fix.

We would like to have the fix backported to 16.04 kernels also, since
this problem is on those kernel also. Could you please target this bug
against artful and xenial also?

Thanks

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[Bug 1761104] Re: fix regression in mm/hotplug, allows NVIDIA driver to work

[Breno Leitão]

I understand there is not a released kernel with this fix yet, right?

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[Bug 1763386] Re: Fix trying to "push" an already active pool VP

[Breno Leitão]

https://lists.ubuntu.com/archives/kernel-team/2018-April/091582.html

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[Bug 1744173] Re: artful: rfi-flush: Switch to new linear fallback flush

[Breno Leitão]

hi Joseph,

I tested on both versions and the kernel solves the problem:

== Xenial ==
#  uname -a
Linux 1604 4.4.0-116-generic #140~lp1744174 SMP Tue Mar 6 14:15:54 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

== Artful ==
# uname -a
Linux 1710 4.13.0-36-generic #40~lp1744173 SMP Tue Mar 6 14:17:17 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

The patches can make the official tree in my opinion.

PS: You look the kernel version, it has the extesion ~lpXX, one
refers to  lp1744173 and the other one to lp1744174, but I understand it
was a typo, and both refers to the same fix (lp1744173), right?

Thanks!

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  artful: rfi-flush: Switch to new linear fallback flush

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[Bug 1760099] Re: Additional spectre and meltdown patches

[Breno Leitão]

Patch sent to the mailing list: https://lists.ozlabs.org/pipermail
/linuxppc-dev/2018-April/171510.html

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[Bug 1760099] Re: Additional spectre and meltdown patches

[Breno Leitão]

Hi Tyler,

Yes, we need to backport this patchset to all the current supported
kernel. Since most of the supported kernel contains the whole RFI infra
structure, I do not expect it to be hard. If you need help, I can find
someone to help on the backport.

Regarding the problem you are facing, I talked to the powerpc maintainer
(Michael Ellerman) and he suggested squashing the warning using
something as the code below. He will be also sending the patch upstream.

```
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 66f2b6299c40..44c30dd38067 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -880,7 +880,7 @@ void rfi_flush_enable(bool enable)
 rfi_flush = enable;
 }
 
-static void init_fallback_flush(void)
+static void __ref init_fallback_flush(void)
 {
 u64 l1d_size, limit;
 int cpu;

```

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  Additional spectre and meltdown patches

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[Bug 1716924] Re: [needs-packaging] [Ubuntu 18.04 FEAT] Include cxlflash package in Ubuntu

[Breno Leitão]

I was able to talk to Mike and he is OK with most of the changes, we
just need two minor fixes, if possible:

1) Upgrade the package to version 5, which was just released and
contains important fixes.

2) Rename libcflsh0 and libcflsh-dev to libcxlflash0 and libcxlflash-dev

That done, we can upload the file to the archive.

Thank you,
Breno

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[Bug 1758910] Re: Important Kernel fixes to be backported for Power9 (kvm)

[Breno Leitão]

** Changed in: linux (Ubuntu Bionic)
   Status: Incomplete => Confirmed

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[Bug 1760099] Re: Additional spectre and meltdown patches

[Breno Leitão]

Hey Tyler,

I thought these patches were in already, so, let's bring them also.

Backporting without these fixes might not be easy to accomplish, and
nothing something we want to keep for the whole 18.04 life. Let's try to
be as near as possible to upstream and bring the required patches in.

Thanks for asking,
Breno

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[Bug 1758118] Re: src/mongo/db/fts/unicode is not optimised on ppc64el

[Breno Leitão]

I wrote a very small code that mimics this problem, it is at:

  https://github.com/leitao/altivec

I found that the information we are looking for (i.e, the bitmap) is at
the second half of the vector, i.e,  vec_extract(VSR, 1) will return the
correct value of the output of the perm value, and vec_extract(VSR, 0)
will always return zero, independent of the Vector input and the bit
mask.

That said, it seems that the change makes sense on current compilers,
but, I am wondering why it changed from GCC 5.4 to current GCC.

I will test the same code on old compilers and see if I get a different
behavior. I suspect that there was a change on GCC (Maybe the one
provided by 84033?) that caused this element order change.

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[Bug 1751994] Re: ppc64el: Support firmware disable of RFI flush

[Breno Leitão]

Can we increase the priority of this bug from medium to high, please?

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[Bug 1744173] Re: artful: rfi-flush: Switch to new linear fallback flush

[Breno Leitão]

Yes, Andy. This is part of the Meltdown patchset. It is very important
to have it integrated, as, it increase the flush performance in 8x on a
POWER8.

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[Bug 1744173] Re: artful: rfi-flush: Switch to new linear fallback flush

[Breno Leitão]

Hi,

Any update about this patchset?

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[Bug 1749735] Re: cpufrequtils: Disable cpufrequtils on ppc64el:

[Breno Leitão]

Thanks Hans, you are correct. I opened two bugs, this one could be
closed as a dup of
https://bugs.launchpad.net/ubuntu/+source/cpufrequtils/+bug/1748444

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[Bug 1746299] Re: update makedumpfile tool version to v1.6.3

[Breno Leitão]

Hi Cascardo,

How are you planning to fix it on 16.04 since package version upgrade is
not allowed? Are you going to cherry pick the patches?

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[Bug 1672090] Re: sync nvme-cli to latest version

[Breno Leitão]

I upgrade the most recent nvme-cli package to Debian unstable at this
moment.

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[Bug 1724120] Re: Ubuntu 16.04.3 - call traces occurs when memory-hotplug test is run with 16Gb hugepages configured

[Breno Leitão]

hi Andrew,

I understand that the patches are already accepted on upstream release,
aren't they?

I can see them on Linus' tree.

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  with 16Gb hugepages configured

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[Bug 1707875] Re: [18.04] include support for Python bindings in "perf"

[Breno Leitão]

Tes, let's target this one for 18.04.

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[Bug 1725350] Re: KVM on 17.10 crashes the machine

[Breno Leitão]

I tested kernel 4.13.0-18 and I do not see this problem anymore. Marking
it as verification-done.

I am also not seeing the problem reported at LP#1733864 also. I am
wondering if they were related.

➜  ~ uname -a
Linux 1710 4.13.0-18-generic #21-Ubuntu SMP Tue Nov 21 17:00:07 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux

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[Bug 1735159] Re: powerpc/powernv: Flush console before platform error reboot

[Breno Leitão]

Joseph,

I tested this kernel and it works fine without any seen regression.
Thanks for the kernel:

#  uname -a
Linux cake 4.10.0-40-generic #44~lp1735159 SMP Wed Nov 29 16:04:16 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux

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[Bug 1733864] Re: kernel 4.10.0-40 is hanging with a CPU soft lock

[Breno Leitão]

I also found that if I run artful VM on the same hypervisor, I do not
see this problem on artful kernel.

So, from what I see, it seems to be a problem on kernel 4.10 that is
being exposed better on a KVM that runs on kernel 4.13.

This is better log I was able to capture:

[   32.029274] NMI watchdog: BUG: soft lockup - CPU#10 stuck for 22s! 
[swapper/10:0]
[   32.029402] Modules linked in: vmx_crypto kvm ib_iser rdma_cm iw_cm ib_cm 
ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 
btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx 
xor raid6_pq libcrc32c raid1 raid0 multipath linear ibmvscsi ibmveth 
crc32c_vpmsum virtio_blk
[   32.029464] CPU: 10 PID: 0 Comm: swapper/10 Not tainted 4.10.0-383-generic 
#383
[   32.029466] task: c007f7663c00 task.stack: c007fe158000
[   32.029467] NIP: c00163c4 LR: c00163c4 CTR: 0006
[   32.029467] REGS: c007fe15b590 TRAP: 0901   Not tainted  
(4.10.0-383-generic)
[   32.029468] MSR: 80009033 
[   32.029472]   CR: 28002824  XER: 
[   32.029472] CFAR: c01894e4 SOFTE: 1 
   GPR00: c018995c c007fe15b810 c14ac900 
0900 
   GPR04: c010bc30 c007ffda2980 8000 
c007fe15b8c8 
   GPR08:  0600 0100 
c007ffd8e128 
   GPR12: c09b8450 c7b85a00 
[   32.029483] NIP [c00163c4] arch_local_irq_restore+0x74/0x90
[   32.029484] LR [c00163c4] arch_local_irq_restore+0x74/0x90
[   32.029485] Call Trace:
[   32.029486] [c007fe15b810] [fffee2c1] 0xfffee2c1 (unreliable)
[   32.029488] [c007fe15b830] [c018995c] expire_timers+0x13c/0x210
[   32.029490] [c007fe15b8a0] [c0189bd8] 
run_timer_softirq+0x1a8/0x230
[   32.029492] [c007fe15b940] [c0bae11c] __do_softirq+0x19c/0x3fc
[   32.029494] [c007fe15ba30] [c00f28c8] irq_exit+0xe8/0x120
[   32.029496] [c007fe15ba50] [c00250d4] timer_interrupt+0xa4/0xe0
[   32.029498] [c007fe15ba80] [c00090d4] 
decrementer_common+0x114/0x120
[   32.029501] --- interrupt: 901 at plpar_hcall_norets+0x1c/0x28
   LR = check_and_cede_processor+0x38/0x50
[   32.029502] [c007fe15bd70] [c09b80d4] 
check_and_cede_processor+0x24/0x50 (unreliable)
[   32.029504] [c007fe15bdd0] [c09b84a4] shared_cede_loop+0x54/0x150
[   32.029506] [c007fe15be00] [c09b53ec] 
cpuidle_enter_state+0x17c/0x450
[   32.029507] [c007fe15be60] [c01519a0] call_cpuidle+0x50/0xa0
[   32.029509] [c007fe15be80] [c0151ec0] do_idle+0x2d0/0x340
[   32.029510] [c007fe15bf00] [c01521c0] cpu_startup_entry+0x40/0x60
[   32.029512] [c007fe15bf30] [c0047200] start_secondary+0x340/0x390
[   32.029514] [c007fe15bf90] [c000aa6c] 
start_secondary_prolog+0x10/0x14
[   32.029515] Instruction dump:
[   32.029517] 994d01d2 2fa3 409e0024 e92d0020 61298000 7d210164 38210020 
e8010010 
[   32.029520] 7c0803a6 4e800020 6042 4bff42e5 <6000> 4be4 6042 
e92d0020 
[   34.073274] INFO: rcu_sched detected stalls on CPUs/tasks:
[   34.073318]  10-...: (8 GPs behind) idle=ab9/1/0 softirq=703/703 fqs=2514 
[   34.073352]  (detected by 13, t=5252 jiffies, g=-67, c=-68, q=6813)
[   34.073386] Task dump for CPU 10:
[   34.073387] swapper/10  R  running task0 0  1 0x0804
[   34.073389] Call Trace:
[   34.073391] [c007fe15bb20] [0001] 0x1 (unreliable)
[   97.093266] INFO: rcu_sched detected stalls on CPUs/tasks:
[   97.093310]  10-...: (8 GPs behind) idle=ab9/1/0 softirq=703/703 fqs=10197 
[   97.093342]  (detected by 13, t=21007 jiffies, g=-67, c=-68, q=169213)
[   97.093378] Task dump for CPU 10:
[   97.093379] swapper/10  R  running task0 0  1 0x0804
[   97.093382] Call Trace:
[   97.093384] [c007fe15bb20] [0001] 0x1 (unreliable)

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  kernel 4.10.0-40 is hanging with a CPU soft lock

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[Bug 1733864] Re: kernel 4.10.0-40 is hanging with a CPU soft lock

[Breno Leitão]

I found something interesting. The original dump above was reproduced
with kernel 4.4.0-94-generic in the hypervisor. It is very hard to
reproduce this issue on the following hypervisor (I just reproduce this
once in a while).

I migrated to a machine to use kernel 4.13.0-17-generic and the problem
is being reproduced instantaneously.

That said, I understand that the problem has something to do with the
hypervisor kernel version.

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  kernel 4.10.0-40 is hanging with a CPU soft lock

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[Bug 1733864] Re: kernel 4.10.0-40 is hanging with a CPU soft lock

[Breno Leitão]

Looking in a email thread titled "RCU lockup issues when
CONFIG_SOFTLOCKUP_DETECTOR=n - any one else seeing this?"[1] it seems
that this problem is very similar to the one in the thread.

The final fix seems to be commit id
2fe59f507a65dbd734b990a11ebc7488f6f87a24.


[1] 
http://linuxppc.10917.n7.nabble.com/Re-RCU-lockup-issues-when-CONFIG-SOFTLOCKUP-DETECTOR-n-any-one-else-seeing-this-tt125634.html#none;

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[Bug 1725350] Re: KVM on 17.10 crashes the machine

[Breno Leitão]

Hi Joseph,

I tested in the mainline kernel, and the problem does not happen. This
is a problem we are only seeing in 17.10 at this moment.

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[Bug 1724175] Re: dynamic RMC package missing from Ubuntu 17.10 Beta

[Breno Leitão]

I think that the problem is related to lack of artful build for
dynamicRM in the `ibmpackages' PPA.

I was able to upload it already at with version 2.0.5-1-103-3ubuntu1.

Please install it and make sure you can continue your tests:

https://launchpad.net/~ibmpackages/+archive/ubuntu/rsct/+build/13595398

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[Bug 1721070] Re: powerpc/64s: Add workaround for P9 vector CI load issuenext

[Breno Leitão]

Joseph,

Quick update on this bug.

I tested your artful test and:

a) It didn't cause any regression. I tested on two P9 with different
processor level and P8 and the code runs fine.

b) It seems to be fixing the issue that is proposed to fix.

c) There are some test cases that are still failing, and might require
extra and we will might request those in another bug.

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[Bug 1721070] Re: powerpc/64s: Add workaround for P9 vector CI load issuenext

[Breno Leitão]

Joseph,

Which branch did you use? I can't find the commits at master or master-
next:

[root@ltc-wspoon9 ubuntu-artful]# git log --oneline js-master | head -n 20
1e3dad9 UBUNTU: Ubuntu-4.13.0-12.13
1f46464 UBUNTU: [Config] CONFIG_I2C_XLP9XX=m
39ae1ca perf/x86: Fix data source decoding for Skylake
f473bf9 perf/x86: Move Nehalem PEBS code to flag
a8725d5 UBUNTU: [Config] CONFIG_DRM_VBOXVIDEO=n
30d9497 UBUNTU: [Config] Disable CONFIG_IPMMU_VMSA on arm64
806240e scsi: cxlflash: Fix vlun resize failure in the shrink path
69f4910 fs: aio: fix the increment of aio-nr and counting against aio-max-nr
675f3cd UBUNTU: [Config] CONFIG_PINCTRL_DENVERTON=m
ebaccf7 libnvdimm, btt: rework error clearing
4bda159 libnvdimm: fix potential deadlock while clearing errors
adfc036 libnvdimm, btt: cache sector_size in arena_info
b79a931 libnvdimm, btt: ensure that flags were also unchanged during a map_read
45f43c2 libnvdimm, btt: refactor map entry operations with macros
36a7c4e libnvdimm, btt: fix a missed NVDIMM_IO_ATOMIC case in the write path
3f6cafd dax: move all DAX radix tree defs to fs/dax.c
52522e9 dax: remove DAX code from page_cache_tree_insert()
54585e3 dax: use common 4k zero page for dax mmap reads
7b6956d dax: relocate some dax functions
a9342b2 mm: add vm_insert_mixed_mkwrite()


[root@ltc-wspoon9 ubuntu-artful]# git log --oneline js-master-next | head -n 20
f30326f4 UBUNTU: Start new release
ba39ad1 UBUNTU: Ubuntu-4.13.0-15.16
655913c Revert "powerpc/powernv: Add IMC OPAL APIs"
4bab524 Revert "powerpc/powernv: Detect and create IMC device"
192a8d2 Revert "powerpc/perf: Add nest IMC PMU support"
1b9f175 Revert "powerpc/powernv: Add support for powercap framework"
386a56a Revert "powerpc/powernv: Add support to set power-shifting-ratio"
8dc96fd Revert "powerpc/powernv: Enable PCI peer-to-peer"
fdea4c4 Revert "powerpc/powernv/vas: Define macros, register fields and 
structures"
258fa77 Revert "powerpc/powernv: Move GET_FIELD/SET_FIELD to vas.h"
efb0381 Revert "powerpc/powernv/vas: Define vas_init() and vas_exit()"
18c0c36 Revert "powerpc/powernv/vas: Define helpers to access MMIO regions"
b717098 Revert "powerpc/powernv/vas: Define helpers to init window context"
cef2434 Revert "powerpc/powernv/vas: Define helpers to alloc/free windows"
8d6ed22 Revert "powerpc/powernv/vas: Define vas_rx_win_open() interface"
15b835b Revert "powerpc/powernv/vas: Define vas_win_close() interface"
47073e3 Revert "powerpc/powernv/vas: Define vas_tx_win_open()"
5afb9ea Revert "powerpc/powernv/vas: Define copy/paste interfaces"
9cf4ce8 Revert "UBUNTU: [Config] CONFIG_PPC_VAS=y"
b22a1be Revert "crypto/nx: Rename nx842_powernv_function as icswx function"

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  powerpc/64s: Add workaround for P9 vector CI load issuenext

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[Bug 1721070] Re: powerpc/64s: Add workaround for P9 vector CI load issuenext

[Breno Leitão]

Joseph,

Do you have a kernel source for this package that I can take a deeper
look?

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[Bug 1672650] Re: chzdev ccwgroup qeth properties incorrect ordering with respect to online

[Breno Leitão]

** Information type changed from Public to Public Security

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Title:
  chzdev ccwgroup qeth properties incorrect ordering with respect to
  online

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[Bug 1718293] Re: [Ubuntu 17.10] POWER9 - Base - Integrate P9 VAS (Virtual Accelerator Switchboard) support in kernel

[Breno Leitão]

There is an indication that the tree artful master-next kernel is broken
on POWER9 and it seems to be related to this patchset. I am looking at
it, maybe we will need to revert it.

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Title:
  [Ubuntu 17.10] POWER9 - Base - Integrate P9 VAS (Virtual Accelerator
  Switchboard) support in kernel

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[Bug 1707875] Re: include support for Python bindings in "perf"

[Breno Leitão]

Hello Canonical,

Any update about this bug? Will it make 17.10?

Thank you,
Breno

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[Bug 1700606] Re: POWER9: CAPI2 enablement - Fixes

[Breno Leitão]

** Changed in: ubuntu-power-systems
   Status: In Progress => Invalid

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[Bug 1716924] Re: [Ubuntu 17.10 FEAT] Include cxlflash package in Ubuntu

[Breno Leitão]

This is a bug that should be assigned to the foundation team.

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  [Ubuntu 17.10 FEAT] Include cxlflash package in Ubuntu

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[Bug 1716491] Re: New PMU fixes for marked events.

[Breno Leitão]

Joseph,

Thanks for the kernel. I tested it and it worked.

ubuntu@ltc-wspoon3:~$ uname -a
Linux ltc-wspoon3 4.10.0-33-generic #37~lp1716491 SMP Tue Sep 12 19:34:42 UTC 
2017 ppc64le ppc64le ppc64le GNU/Linux

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[Bug 1715101] Re: Xenial : installer fails on POWER9

[Breno Leitão]

Fred,

Does it mean we will need to have a 16.04.3 ISO respin? Can we wait un

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[Bug 1709784] Re: KVM on 16.04.3 throws an error

[Breno Leitão]

Christian,

I am looking at 4.4 git repository and version -93 contains exactly the
problem described here, it contains the commit#
46a704f8409f79fd66567ad3f8a7304830a84293 (as
a97e978574f41ffcf1813c180aba2772d46fbb5b), but it does not include
commit# e47057151422a67ce08747176fa21cb3b526a2c9.

That said, we probably want to include
e47057151422a67ce08747176fa21cb3b526a2c9 into 4.4 series as soon as
possible.

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  KVM on 16.04.3 throws an error

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[Bug 1704479] Re: Change CONFIG_IBMVETH to module

[Breno Leitão]

Verification done!

** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty

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  Change CONFIG_IBMVETH to module

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[Bug 1709784] Re: KVM on 16.04.3 throws an error

[Breno Leitão]

I also tested xenial GA kernel:

sid ➜  ~  sudo uname -a
Linux sid 4.4.0-89-generic #112~lp1709784 SMP Thu Aug 10 19:39:43 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux

sid ➜  ~  sudo virsh list
 IdName   State

 2 debian running
 3 1604   running
 4 unstable   running

sid ➜  ~  sudo virsh console 1604
Connected to domain 1604
Escape character is ^]

Ubuntu 16.04.3 LTS 1604 hvc0

1604 login:

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  KVM on 16.04.3 throws an error

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[Bug 1709784] Re: KVM on 16.04.3 throws an error

[Breno Leitão]

I just tested zesty kernel and it worked fine:

# uname -a
Linux sid 4.10.0-30-generic #34~lp1709784 SMP Thu Aug 10 20:01:17 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux

#  sudo virsh list  
   
 IdName   State

 1 unstable   running
 2 debian running
 4 1604   running

#  sudo virsh console 1604
Connected to domain 1604
Escape character is ^]

Ubuntu 16.04.3 LTS 1604 hvc0

1604 login:

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[Bug 1692837] Re: Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large number of virtual adapters

[Breno Leitão]

** Tags removed: verification-needed
** Tags added: verification-done

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  Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large
  number of virtual adapters

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[Bug 1702159] Re: Opal and POWER9 DD2

[Breno Leitão]

I am not able to test this bug on DD2 hardware at this moment, but I
tested on DD1 and POWER8 and I didn't see a regression. Marking it as
validated.

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  Opal and POWER9 DD2

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[Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Breno Leitão]

Tested it on my machine and the original problem was not seen.


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  powerpc: Invalidate ERAT on powersave wakeup for POWER9

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[Bug 1702792] Re: Installation on ppc64le stuck when trying to setup LVM

[Breno Leitão]

** Changed in: debian-installer (Ubuntu)
 Assignee: (unassigned) => Taco Screen team (taco-screen-team)

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  Installation on ppc64le stuck when trying to setup LVM

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[Bug 1704524] Re: Zesty installation on ppc64le not working at all

[Breno Leitão]

** Changed in: debian-installer (Ubuntu)
 Assignee: (unassigned) => Taco Screen team (taco-screen-team)

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  Zesty installation on ppc64le not working at all

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[Bug 1702792] Re: Installation on ppc64le stuck when trying to setup LVM

[Breno Leitão]

Hello Guilherme, could you please attach the installation logs? You can
do it by exiting to shell, at d-i, and grabbing the logs at /var/log.

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  Installation on ppc64le stuck when trying to setup LVM

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[Bug 1704524] Re: Zesty installation on ppc64le not working at all

[Breno Leitão]

Hello Guilherme, could you please attach the installation logs? You can
do it by exiting to shell, at d-i, and grabbing the logs at /var/log.

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  Zesty installation on ppc64le not working at all

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[Bug 1705517] Re: operf not enabled on P9

[Breno Leitão]

Hi Frank,

Regarding your points, here are some answers:

1) These patches were already accepted upstream

2) Debian does not have oprofile anymore. Roberto is working to try to
push it there, but it may take a while.

That said, should we ask the Ubuntu community to help with this request?

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  operf not enabled on P9

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[Bug 1705044] Re: Kernel OPAL regression

[Breno Leitão]

** Changed in: ubuntu-power-systems
   Status: New => Invalid

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

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[Bug 1700606] Re: POWER9: CAPI2 enablement - Fixes

[Breno Leitão]

Canonical is asking us (IBM) to test the kernel in the PPA before
proceeding with the patch inclusion.

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[Bug 1702159] Re: Opal and POWER9 DD2

[Breno Leitão]

Patch sent to kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-July/085402.html

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  Opal and POWER9 DD2

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[Bug 1701272] Re: New NVLINK2 patches

[Breno Leitão]

Patches sent to the kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-June/085279.html

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  New NVLINK2 patches

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[Bug 1700819] Re: ERAT invalidate on context switch removal

[Breno Leitão]

Patch submitted to kernel-team mailing list:

https://lists.ubuntu.com/archives/kernel-team/2017-June/085205.html

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Title:
  ERAT invalidate on context switch removal

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[Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Breno Leitão]

patch sent to kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-June/085197.html

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

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[Bug 1699968] Re: [FFE] Qemu 2.10 in Artful

[Breno Leitão]

Thanks Christian, I support this decision from an IBM point of view.
This FFE will avoid us doing backport of POWER9 virtualization from 2.10
to 2.9.

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[Bug 1699490] Re: Ubuntu 16.04.03: hwinfo --save-config option fails to save the configuration.

[Breno Leitão]

Thanks Frank. I am rejecting this bug at our side for now.

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  configuration.

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[Bug 1692837] Re: Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large number of virtual adapters

[Breno Leitão]

Amartey, could you please test this package at -proposed archive? They
are depending on it to release the package to the official archive.

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  Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large
  number of virtual adapters

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[Bug 1696434] Re: drmgr command fails during the scale-up test on Novalink System (Brazos)

[Breno Leitão]

Amartey, could you please test this package at -proposed archive? They
are depending on it to release the package to the official archive.

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Title:
  drmgr command fails during the scale-up test on Novalink System
  (Brazos)

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[Bug 1691477] Re: Hardware transaction memory corruption

[Breno Leitão]

I tested this fix and now it is fixed on the proposed kernel. I used the
htm torture tool:

https://github.com/leitao/htm_torture/tree/master/narrow

** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty

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  Hardware transaction memory corruption

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[Bug 1698844] Re: Fix /proc/cpuinfo revision for POWER9 DD2

[Breno Leitão]

Sent to the kernel-team mailing list:

https://lists.ubuntu.com/archives/kernel-team/2017-June/084927.html

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  Fix /proc/cpuinfo revision for POWER9 DD2

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[Bug 1692837] Re: Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large number of virtual adapters

[Breno Leitão]

I created a new version for this fix. This is version 1.3.1-2ubuntu0.3
and you could see it on my PPA:

https://launchpad.net/~breno-leitao/+archive/ubuntu/powerpc-ibm-utils

please install the package using:

 # sudo add-apt-repository ppa:breno-leitao/powerpc-ibm-utils
 # sudo apt-get update
 # apt-get install powerpc-ibm-utils

If it fixes the problem, I will ask someone to sponsor this package.

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  Ubuntu 16.04.02: powerpc-ibm-utils: drmgr does not scale with large
  number of virtual adapters

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[Bug 1696434] Re: drmgr command fails during the scale-up test on Novalink System (Brazos)

[Breno Leitão]

I created a new version for this fix. This is version 1.3.1-2ubuntu0.3
and you could see it on my PPA:

https://launchpad.net/~breno-leitao/+archive/ubuntu/powerpc-ibm-utils

please install the package using:

 # sudo add-apt-repository ppa:breno-leitao/powerpc-ibm-utils
 # sudo apt-get update
 # apt-get install powerpc-ibm-utils

If it fixes the problem, I will ask someone to sponsor this package.

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Title:
  drmgr command fails during the scale-up test on Novalink System
  (Brazos)

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[Bug 1692580] Re: ATS fix: Fix opal_npu_destroy_context call

[Breno Leitão]

Patch sent to the kernel-team mailing list:

https://lists.ubuntu.com/archives/kernel-team/2017-May/084305.html

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Title:
  ATS fix: Fix opal_npu_destroy_context call

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[Bug 1690412] Re: powerpc/powernv: Introduce address translation services for Nvlink2

[Breno Leitão]

Yes. This is targeted against 16.04.3 - 4.10 kernel

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  powerpc/powernv: Introduce address translation services for Nvlink2

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[Bug 1690412] Re: powerpc/powernv: Introduce address translation services for Nvlink2

[Breno Leitão]

Patches sent to kernel-team mailing list
https://lists.ubuntu.com/archives/kernel-team/2017-May/084107.html

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Title:
  powerpc/powernv: Introduce address translation services for Nvlink2

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[Bug 1691477] Re: Hardware transaction memory corruption

[Breno Leitão]

Patch sent to kernel-team at https://lists.ubuntu.com/archives/kernel-
team/2017-May/084191.html

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https://bugs.launchpad.net/bugs/1691477

Title:
  Hardware transaction memory corruption

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[Bug 1690225] Re: nvidia-docker on ppc64le-ubuntu16.04 issue due to cross-thread naming if !PR_DUMPABLE

[Breno Leitão]

Patch sent upstream at https://lists.ubuntu.com/archives/kernel-
team/2017-May/084092.html

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Title:
  nvidia-docker on ppc64le-ubuntu16.04  issue due to cross-thread naming
  if !PR_DUMPABLE

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[Bug 1690155] Re: Fix NVLINK2 TCE route

[Breno Leitão]

Patch sent to the mailing list: https://lists.ubuntu.com/archives
/kernel-team/2017-May/084069.html

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Title:
  Fix NVLINK2 TCE route

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[Bug 1686519] Re: POWER9: CAPI2 enablement

[Breno Leitão]

Send to the kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-April/083808.html

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Title:
  POWER9: CAPI2 enablement

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[Bug 1686019] Re: Ubuntu 16.04.3: Qemu fails on P9

[Breno Leitão]

** Changed in: kernel-package (Ubuntu)
   Status: New => Invalid

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Title:
  Ubuntu 16.04.3: Qemu fails on P9

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[Bug 1681429] Re: POWER9: Improve performance on memory management

[Breno Leitão]

Send to the mailing list:

https://lists.ubuntu.com/archives/kernel-team/2017-April/083554.html

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Title:
  POWER9: Improve performance on memory management

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[Bug 1680888] Re: Disable CONFIG_HVC_UDBG on ppc64el

[Breno Leitão]

Sent to the kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-April/083534.html

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Title:
  Disable CONFIG_HVC_UDBG on ppc64el

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[Bug 1675806] Re: POWER9 Radix mode KVM

[Breno Leitão]

I just sent the backported patchset to kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-March/083299.html

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Title:
  POWER9 Radix mode KVM

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[Bug 1675806] Re: POWER9 Radix mode KVM

[Breno Leitão]

Hey Tim,

No, let me try to create one, otherwise I will ask internal help. I will
let you know when I have something better consumable.

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Title:
  POWER9 Radix mode KVM

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[Bug 1667081] Re: Nvlink2: Additional patches

[Breno Leitão]

Hi Seth,

In which yakkety release do you think we will have these patches
integrated?

Thank you,
Breno

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Title:
  Nvlink2: Additional patches

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[Bug 1671169] Re: POWER9: Improve CAS negotiation

[Breno Leitão]

Thanks Tim.

I tested it on one of my power9 machines, and the kernel solves this
issue.

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Title:
  POWER9: Improve CAS negotiation

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[Bug 1670800] Re: Power9 kernel: add virtualization patches

[Breno Leitão]

Hi Tim,

Thanks for providing this kernel, I tested it on one of our machines,
and it is running fine regarding this issue.

Thank you!

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Title:
  Power9 kernel: add virtualization patches

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[Bug 1656908] Re: In Ubuntu 17.04 : after reboot getting message in console like Unable to open file: /etc/keys/x509_ima.der (-2)

[Breno Leitão]

** Tags removed: verification-needed-yakkety
** Tags added: verification-done-yakkety

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Title:
  In Ubuntu 17.04 : after reboot getting message in console like Unable
  to open file: /etc/keys/x509_ima.der (-2)

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[Bug 1555904] Re: opal-prd not installed by default on ppc64el systems

[Breno Leitão]

I would like to mention that this is a very important package for
OpenPower machine. We need to have it installed on every OpenPower
machine that has Ubuntu.

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Title:
  opal-prd not installed by default on ppc64el systems

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[Bug 1666197] Re: POWER9 : Enable Stop 0-2 with ESL=EC=0

[Breno Leitão]

Tim, we would like to target this bug for Yakkety also, please.

Thanks,
Breno

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Title:
  POWER9 : Enable Stop 0-2 with ESL=EC=0

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