I want to make kernel oom_killer run and provide the related log entries in dmesg.I set the following settingsecho 1 > /proc/sys/vm/overcommit_memoryand tried to fill up the RAM to it's max, so that OOM_killer will come in picture and will kill the memory-hungry process. Though, it's killing the application but I can not see relevant message in dmesg ?How can I see messages like:[11686.040460] flasherav invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0[11686.040467] flasherav cpuset=/ mems_allowed=0[11686.040472] Pid: 2859, comm: flasherav Not tainted 3.0.0-12-generic #20-Ubuntu[11686.040476] Call Trace:[11686.040488]  [<c10e1c15>] dump_header.isra.7+0x85/0xc0[11686.040493]  [<c10e1e6c>] oom_kill_process+0x5c/0x80[11686.040498]  [<c10e225f>] out_of_memory+0xbf/0x1d0[11686.040503]  [<c10e6123>] __alloc_pages_nodemask+0x6c3/0x6e0[11686.040509]  [<c10e78d3>] ? __do_page_cache_readahead+0xe3/0x170[11686.040514]  [<c10e0fc8>] filemap_fault+0x218/0x390[11686.040519]  [<c1001c24>] ? __switch_to+0x94/0x1a0[11686.040525]  [<c10fb5ee>] __do_fault+0x3e/0x4b0[11686.040530]  [<c1069971>] ? enqueue_hrtimer+0x21/0x80[11686.040535]  [<c10fec2c>] handle_pte_fault+0xec/0x220[11686.040540]  [<c10fee68>] handle_mm_fault+0x108/0x210[11686.040546]  [<c152fa00>] ? vmalloc_fault+0xee/0xee[11686.040551]  [<c152fb5b>] do_page_fault+0x15b/0x4a0[11686.040555]  [<c1069a90>] ? update_rmtp+0x80/0x80[11686.040560]  [<c106a7b6>] ? hrtimer_start_range_ns+0x26/0x30[11686.040565]  [<c106aeaf>] ? sys_nanosleep+0x4f/0x60[11686.040569]  [<c152fa00>] ? vmalloc_fault+0xee/0xee[11686.040574]  [<c152cfcf>] error_code+0x67/0x6c[11686.040580]  [<c1520000>] ? reserve_backup_gdb.isra.11+0x26d/0x2c0[11686.043598] [ 2657]   999  2657     6624      128   1       0             0 telepathy-indic[11686.043602] [ 2659]   999  2659     2246      112   0       0             0 mission-control[11686.043607] [ 2662]   999  2662     5431      346   1       0             0 gdu-notificatio[11686.043612] [ 2664]     0  2664     3716     2392   0       0             0 mount.ntfs[11686.043617] [ 2679]   999  2679    12453      197   1       0             0 zeitgeist-datah[11686.043621] [ 2685]   999  2685     5196     1581   1       0             0 zeitgeist-daemo[11686.043626] [ 2934]   999  2934    16305      710   0       0             0 gnome-terminal[11686.043631] [ 2938]   999  2938      553        0   0       0             0 gnome-pty-helpe[11686.043636] [ 2939]   999  2939     1814      406   0       0             0 bash[11686.043641] Out of memory: Kill process 2603 (flasherav) score 761 or sacrifice child[11686.043647] Killed process 2603 (flasherav) total-vm:1498536kB, anon-rss:721784kB, file-rss:4228kBUPDATE: I modified the grub.cfg to remove loglevel=0 from kernel line. But still no ring bell
Why does the OOM-killer not log details to be visible through dmesg?
linux;kernel;out of memory