On Friday 19 October 2012 15:27:52 m.roth@xxxxxxxxx wrote:
> Tim Nelson wrote:
> > ----- Original Message -----
> >
> >> On Thursday 18 October 2012 21:44:30 Tim Nelson wrote:
> >> > I see this ocasionally on one of my CentOS 6.3 x64 systems:
> >> >
> >> > Oct 18 03:10:52 backup kernel: swapper: page allocation
> >> > failure. order:1, mode:0x20 Oct 18 03:10:52 backup kernel:
> >> > Pid: 0, comm: swapper Not tainted 2.6.32-279.9.1.el6.x86_64 #1
> >> > Oct 18 03:10:52 backup kernel: Call Trace:
> >> > Oct 18 03:10:52 backup kernel: <IRQ> [<ffffffff8112789f>] ?
> >> > __alloc_pages_nodemask+0x77f/0x940 Oct 18 03:10:52 backup
> >> > kernel:
> >>
> >> <snip>
> >>
> >> > Any thoughts on the cause? The system has 16GB of RAM, and
> >> > whenever checked, there is no swap usage. Is this a memory
> >> > error (bad RAM)?
> >>
> >> I have the same problem on a Dell PE R720 with 16GB of RAM doing
> >> lots of networking. It's a file server. It was discussed on the
> >> dell-poweredge mailing list last week
> >> <linux-poweredge@xxxxxxxx>
> >>
> >> The conclusion was that it was harmless but for a discussion and
> >> possible workaround see
> >> <https://bugzilla.redhat.com/show_bug.cgi?id=770545#c16>
> >>
> >> Hope this helps,
>
> Thanks, but I agree with the person in the bugzilla thread, this is
> not "just harmless" - when I see one in the logs, I usually see
> several within a single hour. I *think* that it seems to happen
> more when someone's copying or d/l large datasets, and it makes me
> extrememly worried about the consistency of the data.
Agree it happens when there is a lot of network activity. My box
during the day is a student fileserver and at night it does backups
using BackupPC so a lot of network activity. I haven't seen any
ill-effects but would obviously be happy to get it sorted. I tried the
workaround suggested in the bugzilla thread so I'll see if it has any
effect.
Tony
>
> mark
>
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