On Thu 09-02-17 20:54:49, Yisheng Xie wrote: > Hi all, > I get an oom on a linux 3.10 kvm guest OS. when it triggers the oom > it have about 24G free memory(and host OS have about 10G free memory) > and watermark is sure ok. > > I also check about about memcg limit value, also cannot find the > root cause. > > Is there anybody ever meet similar problem and have any idea about it? > > Any comment is more than welcome! > > Thanks > Yisheng Xie > > ------------- > [ 81.234289] DefSch0200 invoked oom-killer: gfp_mask=0xd0, order=0, oom_score_adj=0 > [ 81.234295] DefSch0200 cpuset=/ mems_allowed=0 > [ 81.234299] CPU: 3 PID: 8284 Comm: DefSch0200 Tainted: G O E ----V------- 3.10.0-229.42.1.105.x86_64 #1 > [ 81.234301] Hardware name: OpenStack Foundation OpenStack Nova, BIOS rel-1.8.1-0-g4adadbd-20161111_105425-HGH1000008200 04/01/2014 > [ 81.234303] ffff880ae2900000 000000002b3489d7 ffff880b6cec7c58 ffffffff81608d3d > [ 81.234307] ffff880b6cec7ce8 ffffffff81603d1c 0000000000000000 ffff880b6cd09000 > [ 81.234311] ffff880b6cec7cd8 000000002b3489d7 ffff880b6cec7ce0 ffffffff811bdd77 > [ 81.234314] Call Trace: > [ 81.234323] [<ffffffff81608d3d>] dump_stack+0x19/0x1b > [ 81.234327] [<ffffffff81603d1c>] dump_header+0x8e/0x214 > [ 81.234333] [<ffffffff811bdd77>] ? mem_cgroup_iter+0x177/0x2b0 > [ 81.234339] [<ffffffff8115d83e>] check_panic_on_oom+0x2e/0x60 > [ 81.234342] [<ffffffff811c17bf>] mem_cgroup_oom_synchronize+0x34f/0x580 OK, so this is a memcg OOM killer which panics because the configuration says so. The OOM report doesn't say so and that is the bug. dump_header is memcg aware and mem_cgroup_out_of_memory initializes oom_control properly. Is this Vanilla kernel? -- Michal Hocko SUSE Labs -- 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>
