diagnosing OOM issue

Fri Apr 16 13:40:51 UTC 2010

You should not run a Linux system without swap. If a process tries to allocate memory and no more real memory is available and also no swap OOM will start killing.
It's a workstation I guess? 

-of

Dave Mitchell <davem at iabyn.com> schrieb:

>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
>-- 
>users mailing list
>users at lists.fedoraproject.org
>To unsubscribe or change subscription options:
>https://admin.fedoraproject.org/mailman/listinfo/users
>Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines