>> >[...] >> >> My script has just detected (and killed) another freezed cgroup. I >> >> must say that i'm not 100% sure that cgroup was really freezed but it >> >> has 99% or more memory usage for at least 30 seconds (well, or it has >> >> 99% memory usage in both two cases the script was checking it). Here >> >> are stacks of processes inside it before they were killed: >> >[...] >> >> pid: 26536 >> >> stack: >> >> [<ffffffff81080a45>] refrigerator+0x95/0x160 >> >> [<ffffffff8106ac2b>] get_signal_to_deliver+0x1cb/0x540 >> >> [<ffffffff8100188b>] do_signal+0x6b/0x750 >> >> [<ffffffff81001fc5>] do_notify_resume+0x55/0x80 >> >> [<ffffffff815cb662>] retint_signal+0x3d/0x7b >> >> [<ffffffffffffffff>] 0xffffffffffffffff >> > >> >[...] >> > >> >This task is sitting in the refigerator which means it has been frozen >> >by the freezer cgroup most probably. I am not familiar with the >> >implementation but my recollection is that you have to thaw that group >> >in order the killed process can pass away. >> >> Yes, my script is freezing the cgroup before killing processes inside >> it. Stacks are taken after the freeze, it that problem? > >I thought you had a problem to remove this particular group... >-- >Michal Hocko >SUSE Labs My script detected another freezed cgroup today, sending stacks. Is there anything interesting? pid: 947 stack: [<ffffffff810ceefe>] sleep_on_page_killable+0xe/0x40 [<ffffffff810cee57>] __lock_page_killable+0x67/0x70 [<ffffffff810d1067>] generic_file_aio_read+0x4d7/0x790 [<ffffffff81116a8a>] do_sync_read+0xea/0x130 [<ffffffff81117a40>] vfs_read+0xf0/0x220 [<ffffffff81117c71>] sys_read+0x51/0x90 [<ffffffff815cbce6>] system_call_fastpath+0x18/0x1d [<ffffffffffffffff>] 0xffffffffffffffff pid: 949 stack: [<ffffffff810ceefe>] sleep_on_page_killable+0xe/0x40 [<ffffffff810cee57>] __lock_page_killable+0x67/0x70 [<ffffffff810d1067>] generic_file_aio_read+0x4d7/0x790 [<ffffffff81116a8a>] do_sync_read+0xea/0x130 [<ffffffff81117a40>] vfs_read+0xf0/0x220 [<ffffffff81117c71>] sys_read+0x51/0x90 [<ffffffff815cbce6>] system_call_fastpath+0x18/0x1d [<ffffffffffffffff>] 0xffffffffffffffff pid: 985 stack: [<ffffffff810ceefe>] sleep_on_page_killable+0xe/0x40 n[<ffffffff810cee57>] __lock_page_killable+0x67/0x70 [<ffffffff810d1067>] generic_file_aio_read+0x4d7/0x790 [<ffffffff81116a8a>] do_sync_read+0xea/0x130 [<ffffffff81117a40>] vfs_read+0xf0/0x220 [<ffffffff81117c71>] sys_read+0x51/0x90 [<ffffffff815cbce6>] system_call_fastpath+0x18/0x1d [<ffffffffffffffff>] 0xffffffffffffffff pid: 987 stack: [<ffffffff810ceefe>] sleep_on_page_killable+0xe/0x40 [<ffffffff810cee57>] __lock_page_killable+0x67/0x70 [<ffffffff810d1067>] generic_file_aio_read+0x4d7/0x790 [<ffffffff81116a8a>] do_sync_read+0xea/0x130 [<ffffffff81117a40>] vfs_read+0xf0/0x220 [<ffffffff81117c71>] sys_read+0x51/0x90 [<ffffffff815cbce6>] system_call_fastpath+0x18/0x1d [<ffffffffffffffff>] 0xffffffffffffffff pid: 1031 stack: [<ffffffff8110f255>] mem_cgroup_oom_synchronize+0x165/0x190 [<ffffffff810d269e>] pagefault_out_of_memory+0xe/0x120 [<ffffffff81026f5e>] mm_fault_error+0x9e/0x150 [<ffffffff81027414>] do_page_fault+0x404/0x490 [<ffffffff815cb7bf>] page_fault+0x1f/0x30 [<ffffffffffffffff>] 0xffffffffffffffff pid: 1032 stack: [<ffffffffffffffff>] 0xffffffffffffffff pid: 1036 stack: [<ffffffff8110f255>] mem_cgroup_oom_synchronize+0x165/0x190 [<ffffffff810d269e>] pagefault_out_of_memory+0xe/0x120 [<ffffffff81026f5e>] mm_fault_error+0x9e/0x150 [<ffffffff81027414>] do_page_fault+0x404/0x490 [<ffffffff815cb7bf>] page_fault+0x1f/0x30 [<ffffffffffffffff>] 0xffffffffffffffff pid: 1038 stack: [<ffffffff8110f255>] mem_cgroup_oom_synchronize+0x165/0x190 [<ffffffff810d269e>] pagefault_out_of_memory+0xe/0x120 [<ffffffff81026f5e>] mm_fault_error+0x9e/0x150 [<ffffffff81027414>] do_page_fault+0x404/0x490 [<ffffffff815cb7bf>] page_fault+0x1f/0x30 [<ffffffffffffffff>] 0xffffffffffffffff -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>