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SubjectRe: 2.6.29.1: nfsd: page allocation failure - nfsd or kernel problem?
On Thu, 18 Jun 2009, Michael Tokarev wrote:

> > http://bugzilla.kernel.org/show_bug.cgi?id=13518
>
> Does not look similar.
>
> I repeated the issue here. The slab which is growing here is buffer_head.
> It's growing slowly -- right now, after ~5 minutes of constant writes over
> nfs, its size is 428423 objects, growing at about 5000 objects/minute rate.
> When stopping writing, the cache shrinks slowly back to an acceptable
> size, probably when the data gets actually written to disk.
>

Not sure if you're referring to the bugzilla entry or Justin's reported
issue. Justin's issue is actually allocating a skbuff_head_cache slab
while the system is oom.

> It looks like we need a bug entry for this :)
>
> I'll re-try 2.6.30 hopefully tomorrow.
>

You should get the same page allocation failure warning with 2.6.30. You
may want to try my patch in http://lkml.org/lkml/2009/6/17/437 which
suppresses the warnings since, as you previously mentioned, there are no
side effects and the failure is easily recoverable.


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