On Thu 2020-05-28 11:05:17, Michal Hocko wrote: > 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. Should the core WARN_ON if that happens and there's enough memory, or something like that? I grepped, and there are not too many users of VM_FAULT_OOM. These might be relevant: drivers/gpu/drm/ttm/ttm_bo_vm.c: * VM_FAULT_OOM on out-of-memory drivers/gpu/drm/ttm/ttm_bo_vm.c: ret = VM_FAULT_OOM; drivers/gpu/drm/ttm/ttm_bo_vm.c: ret = VM_FAULT_OOM; drivers/gpu/drm/i915/gem/i915_gem_mman.c: return VM_FAULT_OOM; drivers/gpu/drm/vkms/vkms_gem.c: ret = VM_FAULT_OOM; drivers/gpu/drm/vgem/vgem_drv.c: ret = VM_FAULT_OOM; Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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