-
Files -
include/linux/oom.h,include/linux/mm.h,mm/oom_kill.c -
Entrypoint -
out_of_memory(), (also invoked viapagefault_out_of_memory())
Example:
[ 33.932118] stress-ng-brk invoked oom-killer: gfp_mask=0x100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), order=0, oom_score_adj=1000
[ 33.932127] CPU: 1 PID: 212 Comm: stress-ng-brk Not tainted 5.10.0-rc3-next-20201116-dirty #4
[ 33.932130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.14.0-1 04/01/2014
[ 33.932132] Call Trace:
[ 33.932147] dump_stack+0x57/0x6a
[ 33.932153] dump_header+0x4c/0x32e
[ 33.932160] ? do_try_to_free_pages+0x263/0x330
[ 33.932165] oom_kill_process.cold+0x4e/0xa9
[ 33.932171] ? find_lock_task_mm+0x4c/0x90
[ 33.932176] out_of_memory+0x192/0x660
[ 33.932185] __alloc_pages_slowpath.constprop.0+0xbef/0xcc0
[ 33.932193] __alloc_pages_nodemask+0x2c3/0x2f0
[ 33.932201] alloc_pages_vma+0x64/0x1a0
[ 33.932207] handle_mm_fault+0x64d/0xe70
[ 33.932215] do_user_addr_fault+0x1ce/0x410
[ 33.932223] exc_page_fault+0x4f/0x110
[ 33.932230] ? asm_exc_page_fault+0x8/0x30
[ 33.932234] asm_exc_page_fault+0x1e/0x30
[ 33.932240] RIP: 0033:0x55fde2e8916d
[ 33.932251] Code: Unable to access opcode bytes at RIP 0x55fde2e89143.
[ 33.932254] RSP: 002b:00007ffd669d9a10 EFLAGS: 00010246
[ 33.932259] RAX: 000055fe0d990000 RBX: 000055fe0d990000 RCX: 00007f29ee67fe7b
[ 33.932261] RDX: 00007f29ee74f480 RSI: 000055fde2fe2923 RDI: 000055fe0d991000
[ 33.932264] RBP: 0000000000001000 R08: 0000000000000000 R09: 00007f29ee582010
[ 33.932266] R10: 0000000000000000 R11: 0000000000000206 R12: 000055fde4a91000
[ 33.932269] R13: 0000000000000004 R14: 00007ffd669d9b30 R15: 0000000000000000
[ 33.932272] Mem-Info:
[ 33.932281] active_anon:7174 inactive_anon:484737 isolated_anon:0
active_file:0 inactive_file:84 isolated_file:0
unevictable:6 dirty:0 writeback:0
slab_reclaimable:2894 slab_unreclaimable:2892
mapped:8 shmem:304 pagetables:4146 bounce:0
free:3275 free_pcp:356 free_cma:0
[ 33.932289] Node 0 active_anon:28696kB inactive_anon:1938948kB active_file:0kB inactive_file:336kB unevictable:24kB isolated(anon):0kB isolated(file):0kB ms
[ 33.932291] Node 0 DMA free:7896kB min:44kB low:56kB high:68kB reserved_highatomic:0KB active_anon:0kB inactive_anon:7960kB active_file:0kB inactive_file:0B
[ 33.932300] lowmem_reserve[]: 0 1965 1965 1965
[ 33.932308] Node 0 DMA32 free:5204kB min:5648kB low:7660kB high:9672kB reserved_highatomic:0KB active_anon:28696kB inactive_anon:1930988kB active_file:0kB B
[ 33.932317] lowmem_reserve[]: 0 0 0 0
[ 33.932325] Node 0 DMA: 2*4kB (U) 4*8kB (UM) 1*16kB (M) 1*32kB (U) 2*64kB (UM) 2*128kB (UM) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 1*4096kB (M) = 78B
[ 33.932361] Node 0 DMA32: 37*4kB (UE) 18*8kB (ME) 1*16kB (M) 1*32kB (U) 10*64kB (UME) 21*128kB (UM) 2*256kB (E) 0*512kB 1*1024kB (M) 0*2048kB 0*4096kB = 52B
[ 33.932395] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
[ 33.932398] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
[ 33.932400] 832 total pagecache pages
[ 33.932403] 440 pages in swap cache
[ 33.932405] Swap cache stats: add 357112, delete 356625, find 48/100
[ 33.932407] Free swap = 0kB
[ 33.932409] Total swap = 1048572kB
[ 33.932411] 524155 pages RAM
[ 33.932412] 0 pages HighMem/MovableOnly
[ 33.932414] 15903 pages reserved
[ 33.932415] 0 pages cma reserved
[ 33.932417] Tasks state (memory values in pages):
[ 33.932419] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name
[ 33.932429] [ 99] 0 99 19541 62 188416 229 -250 systemd-journal
[ 33.932435] [ 109] 0 109 7413 1 81920 378 -1000 systemd-udevd
[ 33.932439] [ 134] 81 134 1820 1 49152 140 -900 dbus-daemon
[ 33.932443] [ 136] 0 136 4727 0 77824 282 0 systemd-logind
[ 33.932447] [ 138] 977 138 750 0 45056 88 0 dhcpcd
[ 33.932451] [ 139] 0 139 824 11 49152 75 0 dhcpcd
[ 33.932455] [ 140] 977 140 703 10 45056 57 0 dhcpcd
[ 33.932458] [ 141] 977 141 703 10 45056 57 0 dhcpcd
[ 33.932461] [ 151] 0 151 618 0 45056 32 0 agetty
[ 33.932465] [ 152] 0 152 1692 0 49152 172 0 login
[ 33.932469] [ 156] 977 156 824 9 49152 75 0 dhcpcd
[ 33.932473] [ 159] 1000 159 5054 0 81920 391 0 systemd
[ 33.932477] [ 160] 1000 160 6172 10 86016 631 0 (sd-pam)
[ 33.932480] [ 166] 1000 166 1831 2 61440 487 0 zsh
[ 33.932484] [ 204] 1000 204 9334 18 69632 67 0 stress-ng
[ 33.932488] [ 205] 1000 205 9334 23 69632 64 0 stress-ng-brk
[ 33.932491] [ 206] 1000 206 9334 23 69632 64 0 stress-ng-brk
[ 33.932494] [ 207] 1000 207 9334 34 69632 55 0 stress-ng-stack
[ 33.932498] [ 208] 1000 208 9334 23 69632 64 0 stress-ng-stack
[ 33.932502] [ 209] 1000 209 192035 122496 1531904 60287 1000 stress-ng-brk
[ 33.932506] [ 211] 1000 211 1322987 189734 10596352 139070 1000 stress-ng-stack
[ 33.932510] [ 212] 1000 212 177014 108359 1409024 59406 1000 stress-ng-brk
[ 33.932513] [ 213] 1000 213 291120 70500 2326528 51 1000 stress-ng-stack
[ 33.932517] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,task=stress-ng-stack,pid=211,uid=1000
[ 33.932534] Out of memory: Killed process 211 (stress-ng-stack) total-vm:5291948kB, anon-rss:758932kB, file-rss:0kB, shmem-rss:4kB, UID:1000 pgtables:103480
[ 33.992414] oom_reaper: reaped process 211 (stress-ng-stack), now anon-rss:0kB, file-rss:0kB, shmem-rss:4kB