Re: nfsd: page allocation failure - nfsd or kernelproblem?

From: David Rientjes
Date: Wed Jun 17 2009 - 16:40:12 EST

On Thu, 18 Jun 2009, Michael Tokarev wrote:

> >
> 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 which
suppresses the warnings since, as you previously mentioned, there are no
side effects and the failure is easily recoverable.
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