centos kernel: apply do_tcp_sendpages fix from the upstream kernel

[Pavel Boldin]

During the Root Cause Analysis of the bug [1] it was discovered that the CentOS Kernel lacks the necessary patch [2] that fixes the NULL-dereferencing bug.

Fix this by applying a modified patch to our kernel.

[1] https://bugs.launchpad.net/fuel/+bug/1449977
[2] http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=64022d0b4e93ea432e95db55a72b8a1c5775f3c0

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 6.1
Change author: Pavel Boldin <email address hidden>
Review: https://review.fuel-infra.org/6798

[Pavel Boldin (pboldin)]

https://bugs.launchpad.net/fuel/+bug/1451907

[Pavel Boldin (pboldin)]

Preliminary results show that this fixes the bug. More to follow from Mellanox team.

[Aviram Bar-Haim (aviramb)]

Reproduced the problem on ISO 429, CentOS with Classic provisioning over Ethernet, with 1 controller.

After installing the following packages I've got from Pavel:
kernel-2.6.32-504.1.3.el6.mos61.x86_64.rpm
kernel-headers-2.6.32-504.1.3.el6.mos61.x86_64.rpm
kernel-devel-2.6.32-504.1.3.el6.mos61.x86_64.rpm

And recompiling OFED on the new kernel + restart networking, I was able to create snapshot and boot a new VM from it successfully.

We'll try to run stress tests over this fix and we'll update ASAP. Thanks Pavel!

[Amichay Polishuk (amichayp)]

Verified : Tested with the same environment, no exception.

More tests (Stress / Rally) will be execute with a closed ISO.

[Andrey Maximov (maximov)]

can you test this change with custom ISO to ensure that kernel version update will not break BVT?

[Pavel Boldin (pboldin)]

@Andrew, I'm running BVTs at the moment: http://jenkins-product.srt.mirantis.net:8080/view/custom_iso/job/6.1.custom.centos.bvt_1/100

[Aviram Bar-Haim (aviramb)]

+ We're checking classic installation after adding the new kernel RPMs to Fuel CentOS localrepo, over ISO 429.

[Pavel Boldin (pboldin)]

Both BVTs are green.

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/6798
Submitter: Michael Semenov <email address hidden>
Branch: 6.1

Commit: a1f1c85928e4394822315c753c759fe61a76def8
Author: Pavel Boldin <email address hidden>
Date: Tue May 19 13:07:07 2015

fix oops in do_tcp_sendpages

Apply the upstream patch http://git.kernel.org/cgit/linux/kernel/git/stable/\
linux-stable.git/commit/?id=64022d0b4e93ea432e95db55a72b8a1c5775f3c0 to fix
the oops in `do_tcp_sendpages'.

Change-Id: Id0f6d1ccd9e0abd856da385f2ad461a022431a7e
Closes-Bug: #1456605
Related-Bug: #1449977

[Amichay Polishuk (amichayp)]

I will check the fix on version - ISO 460, will update my finding here.

[Pavel Boldin (pboldin)]

The fix was checked and released in 6.1.

Upstream kernel, according to source code research, still do suffer from this regression.