next-20200515: Xorg killed due to "OOM"

[Michal Hocko]

On Tue 26-05-20 11:10:54, Pavel Machek wrote:
[...]
> [38617.276517] oom_reaper: reaped process 31769 (chromium), now anon-rss:0kB, file-rss:0kB, shmem-rss:7968kB
> [38617.277232] Xorg invoked oom-killer: gfp_mask=0x0(), order=0, oom_score_adj=0
> [38617.277247] CPU: 0 PID: 2978 Comm: Xorg Not tainted 5.7.0-rc5-next-20200515+ #117
> [38617.277256] Hardware name: LENOVO 17097HU/17097HU, BIOS 7BETD8WW (2.19 ) 03/31/2011
> [38617.277266] Call Trace:
> [38617.277286]  dump_stack+0x54/0x6e
> [38617.277300]  dump_header+0x45/0x321
> [38617.277313]  oom_kill_process.cold+0x9/0xe
> [38617.277324]  ? out_of_memory+0x167/0x420
> [38617.277336]  out_of_memory+0x1f2/0x420
> [38617.277348]  pagefault_out_of_memory+0x34/0x56
> [38617.277361]  mm_fault_error+0x4a/0x130
> [38617.277372]  do_page_fault+0x3ce/0x416

The reason the OOM killer has been invoked is that the page fault
handler has returned VM_FAULT_OOM. So this is not a result of the page
allocator struggling to allocate a memory. It would be interesting to
check which code path has returned this. 
-- 
Michal Hocko
SUSE Labs