linux-kernel - Unstable kernels work after 2.6.3x

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Date:	Thu, 23 Jan 2014 15:03:47 +0400
From:	Alexey Vlasov <renton@...ton.name>
To:	linux-kernel@...r.kernel.org
Subject: Unstable kernels work after 2.6.3x

Hello,

I've already written that after release of version 2.6.32 something
strange happened either in the kernel or with its base features, namely
since then there was not released even a single kernel, which would at
least on my hosting work consistently and without bugs.

That's the history of kernel crashes on one of my servers:
1.1 2013-02-14 22:47:01 - 3.7.3
1.2 2013-03-07 00:48:25 - 3.7.3
1.3 2013-03-07 13:59:45 - 3.7.3
1.4 2013-03-10 01:20 - 3.7.3
1.5 2013-03-14 00:47 - 3.8.2
1.6 2013-03-15 00:57 - 3.8.2
1.10 2013-03-17 04:00 - 3.8.2
1.14 2013-03-24 22:42 - 3.8.2
1.15 2013-03-25 01:30 - 3.8.2
1.16 2013-03-25 02:57 - 3.7.3
1.17 2013-04-02 06:09 - 3.8.4
1.18 2013-04-12 21:50 - 3.8.4
1.22 2013-06-02 20:12 - 3.8.4
1.23 2013-06-09 16:33 - 3.8.4
1.24 2013-07-28 02:00 - 3.9.4
1.25 2013-08-17 16:45 - 3.9.4
1.26 2013-09-03 21:07 - 3.10.10
1.27 2013-09-07 21:07 - 3.11.0
1.28 2013-09-15 06:18 - 3.11.0
1.29 2013-10-01 21:51 - 3.11.0
1.31 2013-10-11 22:02 - 3.11.4
1.34 2013-10-26 06:32 - 3.11.4
1.36 2013-11-05 06:26 - 3.11.4
1.37 2013-11-17 15:06 - 3.11.4
1.38 2013-12-07 08:29 - 3.9.11
(date - kernel version)

And this is a server with an old one:
# uname -a
Linux l7 2.6.25-r9-1gb-s #3 SMP Fri Nov 14 18:15:42 MSK 2008 x86_64
Intel(R) Xeon(R) CPU E5430 @ 2.66GHz GenuineIntel GNU/Linux
# uptime
 13:29:40 up 731 days, 14:26,  5 users,  load average: 27.56, 18.75, 18.86

Another:
# uname -a
Linux l5 2.6.25-r7-1gb #4 SMP Fri Aug 29 18:43:15 MSD 2008 x86_64
Intel(R) Xeon(R) CPU E5345 @ 2.33GHz GenuineIntel GNU/Linux
# uptime
 13:31:48 up 733 days, 16:18,  5 users,  load average: 13.12, 10.79, 10.67

And it's not just some trash standing in the closet, it's a highloaded
server with several thousand websites and that also perform function of
a gateway for VPS customers.

I certainly can, in some way, understand all these hangings and
failures, but it is difficult and sometimes impossible to explain them
to our clients when they see their non-performing web-sites.

Here's one of the latest of bugs:
(3.12.3_kpanic.txt in attach)

I'm completely satisfied with this kernel specifically, if I could
somehow manage to fix this particular bug, it would be great. I don't
want to try again to move to another new kernel, I've already had such an
experience. If it is possible, can you just release a patch for
particularly this kernel?

Thank you in advance.

-- 
BRGDS. Alexey Vlasov.

View attachment "3.12.3_kpanic.txt" of type "text/plain" (9932 bytes)