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Subjectdbench on tmpfs OOM's
My machine OOM'd during a run of 2 simultaneous dbench 512's on 2
separate 12GB tmpfs fs's on a 32x NUMA-Q with 32GB of RAM, 2.5.35
plus minimalistic booting fixes, no swap, and my recently posted false
OOM fix (though it is perhaps not the most desirable fix).

Note: gfp_mask == __GFP_FS | __GFP_HIGHIO | __GFP_IO | __GFP__WAIT
... the __GFP_FS checks can't save us here.


#1 0xc013ce2e in oom_kill () at oom_kill.c:182
#2 0xc013cee8 in out_of_memory () at oom_kill.c:250
#3 0xc0138bec in try_to_free_pages (classzone=0xc0389300, gfp_mask=464,
order=0) at vmscan.c:561
#4 0xc013989b in balance_classzone (classzone=0xc0389300, gfp_mask=464,
order=0, freed=0xf6169ed0) at page_alloc.c:278
#5 0xc0139b97 in __alloc_pages (gfp_mask=464, order=0, zonelist=0xc02a3e94)
at page_alloc.c:401
#6 0xc013cb57 in alloc_pages_pgdat (pgdat=0xc0389000, gfp_mask=464, order=0)
at numa.c:77
#7 0xc013cba3 in _alloc_pages (gfp_mask=464, order=0) at numa.c:105
#8 0xc0139c23 in get_zeroed_page (gfp_mask=45) at page_alloc.c:442
#9 0xc013db12 in shmem_getpage_locked (info=0xd950f900, inode=0xd950f978,
idx=16) at shmem.c:205
#10 0xc013e6ea in shmem_file_write (file=0xf45dd6c0,
buf=0x804bda1 '\001' <repeats 200 times>..., count=65474, ppos=0xf45dd6e0)
at shmem.c:957
#11 0xc014553c in vfs_write (file=0xf45dd6c0,
buf=0x804bda0 '\001' <repeats 200 times>..., count=65475, pos=0xf45dd6e0)
at read_write.c:216
#12 0xc014561e in sys_write (fd=6,
buf=0x804bda0 '\001' <repeats 200 times>..., count=65475)
at read_write.c:246
#13 0xc010771f in syscall_call () at process.c:966

MemTotal: 32107256 kB
MemFree: 27564648 kB
MemShared: 0 kB
Cached: 4196528 kB
SwapCached: 0 kB
Active: 1924400 kB
Inactive: 2381404 kB
HighTotal: 31588352 kB
HighFree: 27563224 kB
LowTotal: 518904 kB
LowFree: 1424 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
Committed_AS: 4330600 kB
PageTables: 12804 kB
ReverseMaps: 133841
TLB flushes: 1709
non flushes: 1093
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