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SubjectRe: page swap allocation error/failure in 2.6.25
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On Fri, 2008-07-25 at 17:20 +1000, Alex Samad wrote:
> Hi
>
> I reported this earlier (http://lkml.org/lkml/2008/7/13/41) which I had
> attributed to miss match mtu and route information.
>
> But I have started to see the errors again.
>
>
> Jul 25 13:07:07 hufpuf kernel: [269282.912693] swapper: page allocation
> failure. order:2, mode:0x20
> Jul 25 13:07:07 hufpuf kernel: [269282.912700] Pid: 0, comm: swapper
> Tainted: GF 2.6.25-2-amd64 #1
> Jul 25 13:07:07 hufpuf kernel: [269282.912703]
> Jul 25 13:07:07 hufpuf kernel: [269282.912703] Call Trace:
> Jul 25 13:07:07 hufpuf kernel: [269282.912705] <IRQ>
> [<ffffffff8027709a>] __alloc_pages+0x2f8/0x312
> Jul 25 13:07:07 hufpuf kernel: [269282.912750] [<ffffffff80294c63>]
> kmem_getpages+0xc5/0x193
> Jul 25 13:07:07 hufpuf kernel: [269282.912757] [<ffffffff8029529d>]
> fallback_alloc+0x147/0x1c0
> Jul 25 13:07:07 hufpuf kernel: [269282.912769] [<ffffffff80294ed8>]
> kmem_cache_alloc_node+0x105/0x138
> Jul 25 13:07:07 hufpuf kernel: [269282.912777] [<ffffffff803ac4ae>]
> __alloc_skb+0x64/0x12d


Its harmless if it happens sporadically.

Atomic order 2 allocations are just bound to go wrong under pressure.



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