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.