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Bug#597489: marked as done (kswapd using 100% CPU, unable to reboot (soft lockup in pagevec_lookup))

Your message dated Mon, 12 Aug 2013 18:25:09 +0200
with message-id <20130812162509.GC16008@inutil.org>
and subject line Re: kswapd ownes the whole cpu resources, unable to reboot
has caused the Debian Bug report #597489,
regarding kswapd using 100% CPU, unable to reboot (soft lockup in pagevec_lookup)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
597489: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=597489
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-2.6.32-bpo.5-amd64
Version: 2.6.32-21~bpo50+1
Severity: important


/var/log/kern.log: http://pastebin.com/FVV25wf4
libc6: 2.7-18lenny4
System: Dell PowerEdge R710

Hi - we have some problems with backported kernels for a few weeks. This is the first time that we got a nice output from the kernel. I think because we've updated from 2.6.32-15~bpo50+1.
We had a few crashs with the old package which results in a kill of our network and the server itself - results in an EOI Message we have seen in the remote access unit.
The switch has set itself to the root instance of the spanning tree.

Now in the new case we observed a high load (between 80 and 100) with the new package and a look in the processtable has shown that kswapd is running with a cpu load of 100%. We wanted to reboot the system by hand - but nothing happened and we had to reset it. The network didn't care about that problem.

Feel free and request more information please.

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--- End Message ---
--- Begin Message --- 
On Tue, Mar 27, 2012 at 11:06:34AM -0500, Jonathan Nieder wrote:
> Hi again,
> 
> Jonathan Nieder wrote:
> >> Thomas Poo wrote:
> 
> >>> BUG: soft lockup - CPU#11 stuck for 61s! [kswapd1:144]
> > [...]
> >>> Pid: 144, comm: kswapd1 Not tainted 2.6.32-bpo.5-amd64 #1 PowerEdge R710
> >>> RIP: 0010:[<ffffffff810b26cf>]  [<ffffffff810b26cf>] find_get_pages+0x3f/0xbb
> [...]
> > Thanks again for the pointer.  I'd be interested in seeing this fixed in
> > squeeze but haven't been able to reproduce it.  Would you be able to
> > check the fix?  It works like so:
> 
> Do you still have access to hardware that can reproduce this bug, and
> if so, would you be interested in pursuing a fix in squeeze?
> 
> (A squeeze kernel should work without trouble on a wheezy/sid system,
> so this doesn't involve installing any new packages except for the
> kernel itself.  The one complication I know of is the nouveau X
> driver, as documented in [1].  There is a simple workaround for it
> that I can describe if that case applies to you.)
> 
> If the answer is "no", that's fine, but please do let us know so we
> can plan accordingly.
> 
> Thanks for your help,
> Jonathan
> 
> [1] /usr/share/doc/xserver-xorg-video-nouvea/README.Debian

No further feedback, closing the bug.

Cheers,
        Moritz

--- End Message ---
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