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Subjectswapper: page allocation failure. order:2, mode:0x4020 in 2.6.27
Just started with 2.6.27-gentoo-r7 (I think gentoo may have patches 
from 2.6.28) on an x64 system and during an apparently idle time, I
saw this:

Jan 6 23:20:19 [kernel] [358105.255843] swapper: page allocation
failure. order:2, mode:0x4020
Jan 6 23:20:19 [kernel] [358105.255851] Pid: 0, comm: swapper Not
tainted 2.6.27-gentoo-r7 #3
Jan 6 23:20:19 [kernel] [358105.255854]
Jan 6 23:20:19 [kernel] [358105.255854] Call Trace:
Jan 6 23:20:19 [kernel] [358105.255857] <IRQ> [<ffffffff81076bbf>]
__alloc_pages_internal+0x41a/0x439
Jan 6 23:20:19 [kernel] [358105.255872] [<ffffffff8126575c>] ?
__netdev_alloc_skb+0x1d/0x39
Jan 6 23:20:19 [kernel] [358105.255875] [<ffffffff81076c4c>]
__get_free_pages+0x17/0x56
Jan 6 23:20:19 [kernel] [358105.255879] [<ffffffff8109632b>]
__kmalloc_track_caller+0x3b/0xbb
Jan 6 23:20:19 [kernel] [358105.255882] [<ffffffff81264d87>]
__alloc_skb+0x66/0x12c
Jan 6 23:20:19 [kernel] [358105.255885] [<ffffffff8126575c>]
__netdev_alloc_skb+0x1d/0x39
Jan 6 23:20:19 [kernel] [358105.255899] [<ffffffffa00d203c>]
tg3_alloc_rx_skb+0xd1/0x195 [tg3]
Jan 6 23:20:19 [kernel] [358105.255906] [<ffffffffa00d9eb2>]
tg3_poll+0x563/0xa68 [tg3]
Jan 6 23:20:19 [kernel] [358105.255910] [<ffffffff8104b567>] ?
clockevents_program_event+0x73/0x7c
Jan 6 23:20:19 [kernel] [358105.255914] [<ffffffff81268608>]
net_rx_action+0xd3/0x1d0
Jan 6 23:20:19 [kernel] [358105.255917] [<ffffffff81268597>] ?
net_rx_action+0x62/0x1d0
Jan 6 23:20:19 [kernel] [358105.255921] [<ffffffff81035222>]
__do_softirq+0x6d/0xdd
Jan 6 23:20:19 [kernel] [358105.255925] [<ffffffff8100d2cc>]
call_softirq+0x1c/0x28
Jan 6 23:20:19 [kernel] [358105.255928] [<ffffffff8100e405>]
do_softirq+0x34/0x72
Jan 6 23:20:19 [kernel] [358105.255931] [<ffffffff81034f54>]
irq_exit+0x3f/0x82
Jan 6 23:20:19 [kernel] [358105.255933] [<ffffffff8100e6ee>]
do_IRQ+0x146/0x168
Jan 6 23:20:19 [kernel] [358105.255936] [<ffffffff8100c541>]
ret_from_intr+0x0/0xa
Jan 6 23:20:19 [kernel] [358105.255938] <EOI> [<ffffffff812dd3cc>]
? __atomic_notifier_call_chain+0x0/0x87
Jan 6 23:20:19 [kernel] [358105.255947] [<ffffffff81012593>] ?
default_idle+0x2b/0x40
Jan 6 23:20:19 [kernel] [358105.255950] [<ffffffff8100b041>] ?
enter_idle+0x22/0x24
Jan 6 23:20:19 [kernel] [358105.255952] [<ffffffff8100b0d3>] ?
cpu_idle+0x90/0xd8
Jan 6 23:20:19 [kernel] [358105.255956] [<ffffffff812d4ce7>] ?
start_secondary+0x155/0x159
Jan 6 23:20:19 [kernel] [358105.255958]
Jan 6 23:20:19 [kernel] [358105.255959] Mem-Info:
Jan 6 23:20:19 [kernel] [358105.255961] DMA per-cpu:
Jan 6 23:20:19 [kernel] [358105.255963] CPU 0: hi: 0, btch: 1 usd: 0
Jan 6 23:20:19 [kernel] [358105.255965] CPU 1: hi: 0, btch: 1 usd: 0
Jan 6 23:20:19 [kernel] [358105.255967] DMA32 per-cpu:
Jan 6 23:20:19 [kernel] [358105.255968] CPU 0: hi: 186, btch: 31 usd: 126
Jan 6 23:20:19 [kernel] [358105.255970] CPU 1: hi: 186, btch: 31 usd: 148
Jan 6 23:20:19 [kernel] [358105.255972] Normal per-cpu:
Jan 6 23:20:19 [kernel] [358105.255973] CPU 0: hi: 186, btch: 31 usd: 181
Jan 6 23:20:19 [kernel] [358105.255975] CPU 1: hi: 186, btch: 31 usd: 183
Jan 6 23:20:19 [kernel] [358105.255978] Active:218402
inactive:819867 dirty:27016 writeback:0 unstable:0
Jan 6 23:20:19 [kernel] [358105.255980] free:44839 slab:151548
mapped:5449 pagetables:2110 bounce:0
Jan 6 23:20:19 [kernel] [358105.255983] DMA free:5328kB min:4kB
low:4kB high:4kB active:0kB inactive:0kB present:4256kB
pages_scanned:0 all_unreclaimable? yes
Jan 6 23:20:19 [kernel] [358105.255986] lowmem_reserve[]: 0 3480 5484 5484
Jan 6 23:20:19 [kernel] [358105.255991] DMA32 free:169860kB
min:6008kB low:7508kB high:9012kB active:433812kB inactive:1876764kB
present:3563808kB pages_scanned:0 all_unreclaimable? no
Jan 6 23:20:19 [kernel] [358105.255993] lowmem_reserve[]: 0 0 2004 2004
Jan 6 23:20:19 [kernel] [358105.255998] Normal free:4168kB
min:3460kB low:4324kB high:5188kB active:439796kB inactive:1402704kB
present:2052096kB pages_scanned:0 all_unreclaimable? no
Jan 6 23:20:19 [kernel] [358105.256000] lowmem_reserve[]: 0 0 0 0
Jan 6 23:20:19 [kernel] [358105.256004] DMA: 2*4kB 3*8kB 5*16kB
5*32kB 3*64kB 4*128kB 3*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB =
5328kB
Jan 6 23:20:19 [kernel] [358105.256012] DMA32: 42208*4kB 0*8kB
12*16kB 3*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB
0*4096kB = 169760kB
Jan 6 23:20:19 [kernel] [358105.256020] Normal: 914*4kB 1*8kB 2*16kB
1*32kB 1*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB =
4176kB
Jan 6 23:20:19 [kernel] [358105.256029] 1015437 total pagecache pages
Jan 6 23:20:19 [kernel] [358105.256031] 0 pages in swap cache
Jan 6 23:20:19 [kernel] [358105.256032] Swap cache stats: add 0,
delete 0, find 0/0
Jan 6 23:20:19 [kernel] [358105.256034] Free swap = 0kB
Jan 6 23:20:19 [kernel] [358105.256035] Total swap = 0kB
Jan 6 23:20:19 [kernel] [358105.285015] 1572848 pages RAM
Jan 6 23:20:19 [kernel] [358105.285015] 170874 pages reserved
Jan 6 23:20:19 [kernel] [358105.285015] 986700 pages shared
Jan 6 23:20:19 [kernel] [358105.285015] 411152 pages non-shared
--

Maurice Volaski, mvolaski@aecom.yu.edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University


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