Comment 0 for bug 728835

See:
kernel dmesg 2.6.38-rc[4-7]
https://bugzilla.kernel.org/show_bug.cgi?id=28922
$ uname -a
Linux VGN-NS130FE 2.6.38-020638rc7-generic #201103020909 SMP Wed Mar 2 09:11:42 UTC 2011 x86_64 GNU/Linux

[274762.344172] kswapd0: page allocation failure. order:1, mode:0x4020
[274762.344178] Pid: 26, comm: kswapd0 Not tainted 2.6.38-020638rc4-generic
#201102081010
[274762.344180] Call Trace:
[274762.344183] <IRQ> [<ffffffff8110f213>] ?
__alloc_pages_slowpath+0x553/0x720
[274762.344196] [<ffffffff8110beff>] ? zone_watermark_ok+0x1f/0x30
[274762.344201] [<ffffffff8110f573>] ? __alloc_pages_nodemask+0x193/0x1d0
[274762.344205] [<ffffffff815a8884>] ? _raw_spin_lock_irqsave+0x34/0x50
[274762.344210] [<ffffffff81144a93>] ? alloc_pages_current+0xa3/0x110
[274762.344216] [<ffffffff8114e245>] ? allocate_slab+0x175/0x180
[274762.344219] [<ffffffff8114e840>] ? new_slab+0x30/0x170
[274762.344223] [<ffffffff8114fdb9>] ? __slab_alloc+0x1e9/0x250
[274762.344235] [<ffffffffa01090c9>] ? ath_rxbuf_alloc+0x39/0xc0 [ath]
[274762.344239] [<ffffffff81151428>] ? __kmalloc_node_track_caller+0x188/0x1e0
[274762.344244] [<ffffffffa01090c9>] ? ath_rxbuf_alloc+0x39/0xc0 [ath]
[274762.344248] [<ffffffff814ab22f>] ? __alloc_skb+0x7f/0x170
[274762.344252] [<ffffffffa01090c9>] ? ath_rxbuf_alloc+0x39/0xc0 [ath]
[274762.344260] [<ffffffffa022e884>] ? ath_rx_tasklet+0x294/0x600 [ath9k]
[274762.344266] [<ffffffffa022b2c8>] ? ath9k_tasklet+0xb8/0x180 [ath9k]
[274762.344270] [<ffffffff8106b3ba>] ? tasklet_action+0x6a/0x110
[274762.344273] [<ffffffff8106ad40>] ? __do_softirq+0xb0/0x1c0
[274762.344278] [<ffffffff8102fcfa>] ? ack_apic_level+0x7a/0xf0
[274762.344282] [<ffffffff8100cf1c>] ? call_softirq+0x1c/0x30
[274762.344285] [<ffffffff8100e875>] ? do_softirq+0x65/0xa0
[274762.344288] [<ffffffff8106aed5>] ? irq_exit+0x85/0x90
[274762.344292] [<ffffffff815b0cf9>] ? do_IRQ+0x69/0xe0
[274762.344295] [<ffffffff815a8f13>] ? ret_from_intr+0x0/0x15
[274762.344297] <EOI> [<ffffffff815a88d9>] ?
_raw_spin_unlock_irqrestore+0x19/0x30
[274762.344303] [<ffffffff811484c1>] ? isolate_freepages+0x111/0x1a0
[274762.344306] [<ffffffff81148680>] ? compaction_alloc+0x60/0x70
[274762.344309] [<ffffffff811534c8>] ? unmap_and_move+0x48/0x2f0
[274762.344312] [<ffffffff81153815>] ? migrate_pages+0xa5/0x140
[274762.344315] [<ffffffff81148620>] ? compaction_alloc+0x0/0x70
[274762.344318] [<ffffffff81148cc0>] ? compact_zone+0xa0/0x150
[274762.344321] [<ffffffff81148fca>] ? compact_zone_order+0xca/0x100
[274762.344326] [<ffffffff8111a05b>] ? balance_pgdat+0x4eb/0x5d0
[274762.344330] [<ffffffff8111a26b>] ? kswapd+0x12b/0x1a0
[274762.344333] [<ffffffff8111a140>] ? kswapd+0x0/0x1a0
[274762.344337] [<ffffffff810850e7>] ? kthread+0x97/0xa0
[274762.344341] [<ffffffff8100ce24>] ? kernel_thread_helper+0x4/0x10
[274762.344344] [<ffffffff81085050>] ? kthread+0x0/0xa0
[274762.344347] [<ffffffff8100ce20>] ? kernel_thread_helper+0x0/0x10
[274762.344349] Mem-Info:
[274762.344351] Node 0 DMA per-cpu:
[274762.344354] CPU 0: hi: 0, btch: 1 usd: 0
[274762.344357] CPU 1: hi: 0, btch: 1 usd: 0
[274762.344358] Node 0 DMA32 per-cpu:
[274762.344361] CPU 0: hi: 186, btch: 31 usd: 180
[274762.344363] CPU 1: hi: 186, btch: 31 usd: 181
[274762.344368] active_anon:334552 inactive_anon:83841 isolated_anon:20
[274762.344369] active_file:57732 inactive_file:58043 isolated_file:0
[274762.344370] unevictable:42 dirty:2414 writeback:0 unstable:0
[274762.344371] free:8641 slab_reclaimable:10621 slab_unreclaimable:9673
[274762.344372] mapped:170461 shmem:30731 pagetables:12009 bounce:0
[274762.344375] Node 0 DMA free:11556kB min:36kB low:44kB high:52kB
active_anon:0kB inactive_anon:0kB active_file:768kB inactive_file:1976kB
unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15668kB
mlocked:0kB dirty:0kB writeback:0kB mapped:1204kB shmem:0kB
slab_reclaimable:68kB slab_unreclaimable:312kB kernel_stack:0kB pagetables:4kB
unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[274762.344384] lowmem_reserve[]: 0 2883 2883 2883
[274762.344389] Node 0 DMA32 free:23008kB min:6848kB low:8560kB high:10272kB
active_anon:1338208kB inactive_anon:335364kB active_file:230160kB
inactive_file:230196kB unevictable:168kB isolated(anon):80kB isolated(file):0kB
present:2952660kB mlocked:168kB dirty:9656kB writeback:0kB mapped:680640kB
shmem:122924kB slab_reclaimable:42416kB slab_unreclaimable:38380kB
kernel_stack:3480kB pagetables:48032kB unstable:0kB bounce:0kB
writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[274762.344399] lowmem_reserve[]: 0 0 0 0
[274762.344403] Node 0 DMA: 3*4kB 3*8kB 4*16kB 6*32kB 4*64kB 4*128kB 1*256kB
2*512kB 3*1024kB 3*2048kB 0*4096kB = 11556kB
[274762.344413] Node 0 DMA32: 5438*4kB 8*8kB 14*16kB 0*32kB 1*64kB 1*128kB
3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 23000kB
[274762.344423] 165982 total pagecache pages
[274762.344425] 19473 pages in swap cache
[274762.344427] Swap cache stats: add 650825, delete 631352, find
1249740/1303578
[274762.344429] Free swap = 3180904kB
[274762.344431] Total swap = 3574424kB
[274762.350609] 752624 pages RAM
[274762.350609] 153594 pages reserved
[274762.350609] 275668 pages shared
[274762.350609] 491506 pages non-shared
[274762.350609] SLUB: Unable to allocate memory on node -1 (gfp=0x20)
[274762.350609] cache: kmalloc-8192, object size: 8192, buffer size: 8192,
default order: 3, min order: 1
[274762.350609] node 0: slabs: 173, objs: 677, free: 0
[274762.358458] skbuff alloc of size 3904 failed