>>>>> On Thu, 23 Dec 2010 14:03:16 +0100, Caspar Smit said:
> 
> Hi all,
> 
> I have a system running bacula backup for about a year with no problems.
> 
> The last two to three weeks i suddenly had occasional system crashes
> (complete hangs where I need to reset).
> 
> I checked the syslog for any clues and found this error popping up several
> times during backup:
> 
> [198937.504359] swapper: page allocation failure. order:0, mode:0x20
> [198937.504359] Pid: 0, comm: swapper Not tainted 2.6.26-2-amd64 #1
> [198937.504359]
> [198937.504359] Call Trace:
> [198937.504359]  <IRQ>  [<ffffffff80276c15>]
> __alloc_pages_internal+0x3a6/0x3bf
> [198937.504359]  [<ffffffff802957ec>] kmem_getpages+0x96/0x15f
> [198937.504359]  [<ffffffff80295e7c>] fallback_alloc+0x16b/0x1e1
> [198937.504359]  [<ffffffff80295a59>] kmem_cache_alloc_node+0x105/0x138
> [198937.504359]  [<ffffffff803b6771>] __alloc_skb+0x3c/0x12d
> [198937.504359]  [<ffffffff803b7707>] __netdev_alloc_skb+0x29/0x43
> [198937.504359]  [<ffffffffa00bd4ee>] 
> :e1000e:e1000_alloc_rx_buffers+0x83/0x1db

Looks like a bug/misconfiguration in the kernel or e1000 network driver to me.
Google finds lots of cases where "swapper: page allocation failure" occurs in
kmem_getpages inside this driver.


> [198937.504359] 4194304 pages of RAM
> [198937.504359] 75804 reserved pages
> [198937.504359] 3821940 pages shared
> [198937.504359] 10594 pages swap cached

I don't know off-hand what these numbers mean, but 3821940/4194304 pages
shared sounds like it might be a problem if the machine isn't supposed to be
using much RAM.

__Martin

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