I got the message during compiling of the kernel.
(tainted by previous warning)
x86_64, 2Gb of RAM
pdflush: page allocation failure. order:0, mode:0x4000
Pid: 30415, comm: pdflush Tainted: G W 2.6.28-rc7-next-20081209 #3
Call Trace:
[<ffffffff8027c292>] __alloc_pages_internal+0x469/0x488
[<ffffffff802c170d>] ? bvec_alloc_bs+0xdc/0x11a
[<ffffffff8029b3b7>] alloc_slab_page+0x20/0x26
[<ffffffff8029b6b4>] __slab_alloc+0x26c/0x596
[<ffffffff802c170d>] ? bvec_alloc_bs+0xdc/0x11a
[<ffffffff802c170d>] ? bvec_alloc_bs+0xdc/0x11a
[<ffffffff8029bdbb>] kmem_cache_alloc+0x7b/0xbe
[<ffffffff802c170d>] bvec_alloc_bs+0xdc/0x11a
[<ffffffff802c17f4>] bio_alloc_bioset+0xa9/0x101
[<ffffffff802c18b6>] bio_alloc+0x10/0x1f
[<ffffffff80354781>] xfs_alloc_ioend_bio+0x23/0x52
[<ffffffff80354838>] xfs_submit_ioend+0x56/0xd4
[<ffffffff80354e9f>] xfs_page_state_convert+0x5e9/0x642
[<ffffffff803536bb>] ? xfs_count_page_state+0x97/0xb6
[<ffffffff803551cf>] xfs_vm_writepage+0xbe/0xf7
[<ffffffff8027c490>] __writepage+0x15/0x3b
[<ffffffff8027ce0b>] write_cache_pages+0x1cd/0x331
[<ffffffff8027c47b>] ? __writepage+0x0/0x3b
[<ffffffff8027cf91>] generic_writepages+0x22/0x28
[<ffffffff803550f3>] xfs_vm_writepages+0x45/0x4e
[<ffffffff8027cfc2>] do_writepages+0x2b/0x3b
[<ffffffff802b8e98>] __writeback_single_inode+0x186/0x2fa
[<ffffffff802b94c3>] ? generic_sync_sb_inodes+0x2bc/0x30a
[<ffffffff802b9433>] generic_sync_sb_inodes+0x22c/0x30a
[<ffffffff802b972b>] writeback_inodes+0x9d/0xf4
[<ffffffff8027d118>] wb_kupdate+0xa3/0x11e
[<ffffffff8027db96>] pdflush+0x11d/0x1d0
[<ffffffff8027d075>] ? wb_kupdate+0x0/0x11e
[<ffffffff8027da79>] ? pdflush+0x0/0x1d0
[<ffffffff80249cfd>] kthread+0x49/0x76
[<ffffffff8020c8fa>] child_rip+0xa/0x20
[<ffffffff802314de>] ? finish_task_switch+0x0/0xb9
[<ffffffff8020c2c0>] ? restore_args+0x0/0x30
[<ffffffff80249cb4>] ? kthread+0x0/0x76
[<ffffffff8020c8f0>] ? child_rip+0x0/0x20
Mem-Info:
DMA per-cpu:
CPU 0: hi: 0, btch: 1 usd: 0
CPU 1: hi: 0, btch: 1 usd: 0
CPU 2: hi: 0, btch: 1 usd: 0
CPU 3: hi: 0, btch: 1 usd: 0
DMA32 per-cpu:
CPU 0: hi: 186, btch: 31 usd: 109
CPU 1: hi: 186, btch: 31 usd: 154
CPU 2: hi: 186, btch: 31 usd: 76
CPU 3: hi: 186, btch: 31 usd: 39
Active_anon:46892 active_file:71530 inactive_anon:10315
inactive_file:243246 unevictable:0 dirty:15089 writeback:1402 unstable:0
free:1877 slab:116494 mapped:672 pagetables:401 bounce:0
DMA free:1452kB min:40kB low:48kB high:60kB active_anon:0kB
inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB
present:15072kB pages_scanned:0 all_unreclaimable? yes
lowmem_reserve[]: 0 1975 1975 1975
DMA32 free:6056kB min:5664kB low:7080kB high:8496kB
active_anon:187568kB inactive_anon:41260kB active_file:286120kB
inactive_file:972984kB unevictable:0kB present:2023256kB
pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
DMA: 1*4kB 1*8kB 0*16kB 1*32kB 2*64kB 2*128kB 2*256kB 1*512kB 0*1024kB
0*2048kB 0*4096kB = 1452kB
DMA32: 204*4kB 59*8kB 6*16kB 4*32kB 1*64kB 1*128kB 1*256kB 0*512kB
0*1024kB 0*2048kB 1*4096kB = 6056kB
314797 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap = 3911788kB
Total swap = 3911788kB
523088 pages RAM
22877 pages reserved
224954 pages shared
276682 pages non-shared