I've recently upgraded my F11 system's RAM from 1Gb to 2Gb, and at the
same time removed the swap device from /etc/fstab. Since then I'm getting
the OOM killer killing off random processes after a few days' use, even
when memory usage is (apparently) low.
Can anyone advise me what's causing this?
Its a 32-bit system, and I have a suspicion its something to do with low
memory, but the tips I've found via Google seem to refer to the kernel
parameter /proc/sys/vm/lower_zone_protection, which no longer exists.
Further googling implies that this has been replaced with
/proc/sys/vm/lowmem_reserve_ratio, but I can't make head nor tail of its
documentation.
Here is the state of my system after firefox and metacity were killed off,
and I'd restarted firefox:
# free -l
total used free shared buffers cached
Mem: 2053480 1364452 689028 0 2048 965144
Low: 875028 866216 8812
High: 1178452 498236 680216
-/+ buffers/cache: 397260 1656220
Swap: 0 0 0
# cat /proc/meminfo
MemTotal: 2053480 kB
MemFree: 662628 kB
Buffers: 1816 kB
Cached: 968580 kB
SwapCached: 0 kB
Active: 704108 kB
Inactive: 586296 kB
Active(anon): 602384 kB
Inactive(anon): 503044 kB
Active(file): 101724 kB
Inactive(file): 83252 kB
Unevictable: 8 kB
Mlocked: 8 kB
HighTotal: 1178452 kB
HighFree: 653708 kB
LowTotal: 875028 kB
LowFree: 8920 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 140 kB
Writeback: 0 kB
AnonPages: 320048 kB
Mapped: 66756 kB
Slab: 55960 kB
SReclaimable: 17312 kB
SUnreclaim: 38648 kB
PageTables: 11492 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 1026740 kB
Committed_AS: 1810392 kB
VmallocTotal: 122880 kB
VmallocUsed: 24236 kB
VmallocChunk: 83532 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 12280 kB
DirectMap2M: 897024 kB
>From /var/log/messages:
Apr 16 12:12:58 pigeon kernel: Xorg invoked oom-killer: gfp_mask=0x201d4, order=0, oomkilladj=0
Apr 16 12:12:58 pigeon kernel: Xorg cpuset=/ mems_allowed=0
Apr 16 12:12:58 pigeon kernel: Pid: 1844, comm: Xorg Not tainted 2.6.30.10-105.2.23.fc11.i686.PAE #1
Apr 16 12:12:58 pigeon kernel: Call Trace:
Apr 16 12:12:58 pigeon kernel: [<c048b7a5>] oom_kill_process+0x6e/0x1f2
Apr 16 12:12:58 pigeon kernel: [<c048bd54>] ? select_bad_process+0x87/0xce
Apr 16 12:12:58 pigeon kernel: [<c048be0e>] __out_of_memory+0x73/0x82
Apr 16 12:12:58 pigeon kernel: [<c048be80>] out_of_memory+0x63/0x88
Apr 16 12:12:58 pigeon kernel: [<c048e0a1>] __alloc_pages_internal+0x2e8/0x38a
Apr 16 12:12:58 pigeon kernel: [<c0488bd1>] __page_cache_alloc+0x16/0x18
Apr 16 12:12:58 pigeon kernel: [<c0489a43>] read_cache_page_async+0x34/0xfd
Apr 16 12:12:58 pigeon kernel: [<c0495eea>] ? shmem_readpage+0x0/0x36
Apr 16 12:12:58 pigeon kernel: [<c0489b1d>] read_cache_page+0x11/0x49
Apr 16 12:12:58 pigeon kernel: [<f821a134>] i915_gem_object_get_pages+0x91/0xdc [i915]
Apr 16 12:12:58 pigeon kernel: [<f821bc8b>] i915_gem_object_bind_to_gtt+0x162/0x1f6 [i915]
Apr 16 12:12:58 pigeon kernel: [<f821cbb5>] i915_gem_mmap_gtt_ioctl+0x189/0x1cc [i915]
Apr 16 12:12:58 pigeon kernel: [<f81bbbf8>] drm_ioctl+0x202/0x292 [drm]
Apr 16 12:12:58 pigeon kernel: [<f821ca2c>] ? i915_gem_mmap_gtt_ioctl+0x0/0x1cc [i915]
Apr 16 12:12:58 pigeon kernel: [<c05485bc>] ? inode_has_perm+0x60/0x6a
Apr 16 12:12:58 pigeon kernel: [<c04bd01e>] vfs_ioctl+0x5c/0x76
Apr 16 12:12:58 pigeon kernel: [<c04bd4a5>] do_vfs_ioctl+0x46d/0x4a7
Apr 16 12:12:58 pigeon kernel: [<c05488d7>] ? selinux_file_ioctl+0x43/0x46
Apr 16 12:12:58 pigeon kernel: [<c04bd525>] sys_ioctl+0x46/0x66
Apr 16 12:12:58 pigeon kernel: [<c0408474>] sysenter_do_call+0x12/0x28
Apr 16 12:12:58 pigeon kernel: Mem-Info:
Apr 16 12:12:58 pigeon kernel: DMA per-cpu:
Apr 16 12:12:58 pigeon kernel: CPU 0: hi: 0, btch: 1 usd: 0
Apr 16 12:12:58 pigeon kernel: CPU 1: hi: 0, btch: 1 usd: 0
Apr 16 12:12:58 pigeon kernel: Normal per-cpu:
Apr 16 12:12:58 pigeon kernel: CPU 0: hi: 186, btch: 31 usd: 185
Apr 16 12:12:58 pigeon kernel: CPU 1: hi: 186, btch: 31 usd: 164
Apr 16 12:12:58 pigeon kernel: HighMem per-cpu:
Apr 16 12:12:58 pigeon kernel: CPU 0: hi: 186, btch: 31 usd: 166
Apr 16 12:12:58 pigeon kernel: CPU 1: hi: 186, btch: 31 usd: 33
Apr 16 12:12:58 pigeon kernel: Active_anon:175891 active_file:49820 inactive_anon:143709
Apr 16 12:12:58 pigeon kernel: inactive_file:16710 unevictable:2 dirty:2 writeback:0 unstable:0
Apr 16 12:12:58 pigeon kernel: free:100672 slab:14946 mapped:17942 pagetables:3270 bounce:0
Apr 16 12:12:58 pigeon kernel: DMA free:3548kB min:64kB low:80kB high:96kB active_anon:2516kB inactive_anon:2704kB active_file:0kB inactive_file:0kB unevictable:0kB present:15868kB pages_scanned:2647 all_unreclaimable? no
Apr 16 12:12:58 pigeon kernel: lowmem_reserve[]: 0 865 2007 2007
Apr 16 12:12:58 pigeon kernel: Normal free:3400kB min:3728kB low:4660kB high:5592kB active_anon:387844kB inactive_anon:387984kB active_file:92kB inactive_file:0kB unevictable:0kB present:885944kB pages_scanned:675605 all_unreclaimable? no
Apr 16 12:12:58 pigeon kernel: lowmem_reserve[]: 0 0 9134 9134
Apr 16 12:12:58 pigeon kernel: HighMem free:395740kB min:512kB low:1740kB high:2972kB active_anon:313204kB inactive_anon:184120kB active_file:199188kB inactive_file:66840kB unevictable:8kB present:1169244kB pages_scanned:0 all_unreclaimable? no
Apr 16 12:12:58 pigeon kernel: lowmem_reserve[]: 0 0 0 0
Apr 16 12:12:58 pigeon kernel: DMA: 1*4kB 20*8kB 19*16kB 16*32kB 6*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 3540kB
Apr 16 12:12:58 pigeon kernel: Normal: 328*4kB 15*8kB 8*16kB 1*32kB 10*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 3384kB
Apr 16 12:12:58 pigeon kernel: HighMem: 2421*4kB 20044*8kB 9039*16kB 2230*32kB 153*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 395812kB
Apr 16 12:12:58 pigeon kernel: 263903 total pagecache pages
Apr 16 12:12:58 pigeon kernel: 0 pages in swap cache
Apr 16 12:12:58 pigeon kernel: Swap cache stats: add 0, delete 0, find 0/0
Apr 16 12:12:58 pigeon kernel: Free swap = 0kB
Apr 16 12:12:58 pigeon kernel: Total swap = 0kB
Apr 16 12:12:58 pigeon kernel: 521939 pages RAM
Apr 16 12:12:58 pigeon kernel: 294613 pages HighMem
Apr 16 12:12:58 pigeon kernel: 8602 pages reserved
Apr 16 12:12:58 pigeon kernel: 157846 pages shared
Apr 16 12:12:58 pigeon kernel: 347371 pages non-shared
Apr 16 12:12:58 pigeon kernel: Out of memory: kill process 6638 (run-mozilla.sh) score 459935 or a child
Apr 16 12:12:58 pigeon kernel: Killed process 6653 (firefox)
(and so on).
--
There's a traditional definition of a shyster: a lawyer who, when the law
is against him, pounds on the facts; when the facts are against him,
pounds on the law; and when both the facts and the law are against him,
pounds on the table.
-- Eben Moglen referring to SCO
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