On Friday 19 October 2012 15:27:52 m.roth at 5-cent.us 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 at dell.com> > >> > >> 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 > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >