Re: [Bug #14141] order 2 page allocation failures (generic)

Mel Gorman
2009-10-20T10:57:41Z

On Mon, Oct 19, 2009 at 10:17:06PM +0200, Tobias Oetiker wrote:
> Hi Mel,
>
> Today Tobias Oetiker wrote:
>
> > Hi Mel,
> >
> > Today Mel Gorman wrote:
> >
> > > >
> > > > if you can send me a consolidated patch which does apply to
> > > > 2.6.31.4 I will be glad to try ...
> > > >
> > >
> > > Sure
> > >
> > > ==== CUT HERE ====
> > >
> > > From 6c0215af3b7c39ef7b8083ea38ca3ad93cd3f51f Mon Sep 17 00:00:00 2001
> > > From: Mel Gorman <mel@csn.ul.ie>
> > > Date: Mon, 19 Oct 2009 15:40:43 +0100
> > > Subject: [PATCH] Kick off kswapd after direct reclaim and revert congestion changes
> > >
> > > The following patch is http://lkml.org/lkml/2009/10/16/89 on top of
> > > 2.6.31.4 as well as patches 373c0a7e and 8aa7e847 reverted.
> >
> > it seems to help ... the server has been running for 3 hours now
> > without incident, but then again it is not as active as during the
> > day, ... will report tomorrow.
>
> while I was writing, the system found that the patch does not realy
> help:
>
> Oct 19 22:09:52 johan kernel: [11157.121506] smtpd: page allocation failure. order:5, mode:0x4020 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121514] Pid: 19324, comm: smtpd Tainted: G D 2.6.31.4-oep #1 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121518] Call Trace: [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121521] <IRQ> [<ffffffff810cb599>] __alloc_pages_nodemask+0x549/0x650 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121563] [<ffffffffa02bde3b>] ? __nf_ct_refresh_acct+0xab/0x110 [nf_conntrack] [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121572] [<ffffffffa02a8337>] ? ipt_do_table+0x2f7/0x610 [ip_tables] [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121580] [<ffffffff810fac18>] kmalloc_large_node+0x68/0xc0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121585] [<ffffffff810fe90a>] __kmalloc_node_track_caller+0x11a/0x180 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121592] [<ffffffff813ebd42>] ? skb_copy+0x32/0xa0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121596] [<ffffffff813e9606>] __alloc_skb+0x76/0x180 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121600] [<ffffffff813ebd42>] skb_copy+0x32/0xa0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121615] [<ffffffffa07dd33c>] vboxNetFltLinuxPacketHandler+0x5c/0xd0 [vboxnetflt] [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121620] [<ffffffff813f2512>] dev_hard_start_xmit+0x142/0x320 [kern.warning]

Are the number of failures at least reduced or are they occuring at the
same rate? Also, what was the last kernel that worked for you with this
configuration?

Thanks

> Oct 19 22:09:52 johan kernel: [11157.121632] [<ffffffff8140a2c1>] __qdisc_run+0x1a1/0x230 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121637] [<ffffffff813f41e0>] dev_queue_xmit+0x2b0/0x3a0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121642] [<ffffffff8142349b>] ip_finish_output+0x11b/0x2f0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121646] [<ffffffff814236f9>] ip_output+0x89/0xd0 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121650] [<ffffffff81422710>] ip_local_out+0x20/0x30 [kern.warning]
> Oct 19 22:09:52 johan kernel: [11157.121654] [<ffffffff81422ffb>] ip_queue_xmit+0x22b/0x3f0 [kern.warning]
>

--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab