Re: nfsd: page allocation failure - nfsd or kernel problem?

From: Michael Tokarev
Date: Wed Jun 17 2009 - 04:43:55 EST

Michael Tokarev wrote:
Justin Piszcz wrote:
Package: nfs-kernel-server
Version: 1.1.6-1
Distribution: Debian Testing
Architecture: 64-bit

[6042655.755870] Pid: 7093, comm: nfsd Not tainted #4
[6042655.755872] Call Trace:
[6042655.755874] <IRQ> [<ffffffff802850fd>] __alloc_pages_internal+0x3dd/0x4e0
[6042655.755885] [<ffffffff802a738b>] cache_alloc_refill+0x2fb/0x570
[6042655.755887] [<ffffffff802a76db>] __kmalloc+0xdb/0xe0

Was about to send this same report.

The thing continues servicing files it seems, but after some quite
good delay.

This happens after massive amount of writes. does the
same thing. Here it is, for comparison:

Jun 13 17:06:42 gnome vmunix: nfsd: page allocation failure. order:0, mode:0x20
Jun 13 17:06:42 gnome vmunix: Call Trace:
Jun 13 17:06:42 gnome vmunix: <IRQ> [<ffffffff8029559d>] __alloc_pages_internal+0x3fd/0x500
Jun 13 17:06:42 gnome vmunix: [<ffffffff802bd4c3>] cache_alloc_refill+0x313/0x5c0
Jun 13 17:06:42 gnome vmunix: [<ffffffff802bd873>] __kmalloc+0x103/0x110
Jun 13 17:06:42 gnome vmunix: [<ffffffff803dca6d>] __alloc_skb+0x6d/0x150

Justin, by the way, what's the underlying filesystem on the server?

I've seen this error on 2 machines already (both running 2.6.29.x x86-64),
and in both cases the filesystem on the server was xfs. May this be
related somehow to ?
That one is different, but also about xfs and nfs. I'm trying to
reproduce the problem on different filesystem...

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