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Tue, 17 Jul 2012 19:46:34 +0200 |
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On Jul 17, 2012, at 19:22 , Orion Poplawski wrote:
> Our SL6.2 KVM and nfs/backup server has been crashing frequently recently (starting around Fri 13th - yikes!) with Kernel panic - Out of memory and no killable processes. The server has 48GB ram, 2GB swap, only about 15GB dedicated to VM guests. I've tried bumping up vm.min_free_kbytes to 262144 to no avail. Nothing strange is getting written to the logs before the crash.
>
> Happening with both 2.6.32-220.23.1 and 2.6.32-279.1.1.
>
> Anyone else seeing this?
Not on our KVM servers (which don't have any other duties though), which have been running -220.23.1 for three weeks.
> Any other ideas?
Is swap space sufficient?
Have you modified vm.overcommit_* ? Doing so may help turning the panics into allocation failures that can be handled.
Do any slab pools keep growing, to an unusual size?
--
Stephan Wiesand
DESY -DV-
Platanenenallee 6
15738 Zeuthen, Germany
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