On Tue 17-07-18 19:05:47, ufo19890607@xxxxxxxxx wrote: > From: yuzhoujian <yuzhoujian@xxxxxxxxxxxxxxx> > > OOM report contains several sections. The first one is the allocation > context that has triggered the OOM. Then we have cpuset context > followed by the stack trace of the OOM path. Followed by the oom > eligible tasks and the information about the chosen oom victim. > > One thing that makes parsing more awkward than necessary is that we do > not have a single and easily parsable line about the oom context. This > patch is reorganizing the oom report to > 1) who invoked oom and what was the allocation request > [ 131.751307] panic invoked oom-killer: gfp_mask=0x6280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), order=0, oom_score_adj=0 > > 2) OOM stack trace > [ 131.752399] CPU: 16 PID: 8581 Comm: panic Not tainted 4.18.0-rc5+ #48 > [ 131.753154] Hardware name: Inspur SA5212M4/YZMB-00370-107, BIOS 4.1.10 11/14/2016 > [ 131.753806] Call Trace: > [ 131.754473] dump_stack+0x5a/0x73 > [ 131.755129] dump_header+0x53/0x2dc > [ 131.755775] oom_kill_process+0x228/0x420 > [ 131.756430] ? oom_badness+0x2a/0x130 > [ 131.757063] out_of_memory+0x11a/0x4a0 > [ 131.757710] __alloc_pages_slowpath+0x7cc/0xa1e > [ 131.758392] ? apic_timer_interrupt+0xa/0x20 > [ 131.759040] __alloc_pages_nodemask+0x277/0x290 > [ 131.759710] alloc_pages_vma+0x73/0x180 > [ 131.760388] do_anonymous_page+0xed/0x5a0 > [ 131.761067] __handle_mm_fault+0xbb3/0xe70 > [ 131.761749] handle_mm_fault+0xfa/0x210 > [ 131.762457] __do_page_fault+0x233/0x4c0 > [ 131.763136] do_page_fault+0x32/0x140 > [ 131.763832] ? page_fault+0x8/0x30 > [ 131.764523] page_fault+0x1e/0x30 > > 3) oom context (contrains and the chosen victim). > [ 131.771164] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0-1,task=panic,pid=8608,uid=0 > > An admin can easily get the full oom context at a single line which > makes parsing much easier. > > Signed-off-by: yuzhoujian <yuzhoujian@xxxxxxxxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Btw. you can usually keep Acked-by for such a small change. If you are not sure just ask off list. > --- > Changes since v13: > - remove the spaces for printing pid and uid. -- Michal Hocko SUSE Labs
