Am 09.09.19 um 14:08 schrieb Michal Hocko: > On Mon 09-09-19 13:01:36, Michal Hocko wrote: >> and that matches moments when we reclaimed memory. There seems to be a >> steady THP allocations flow so maybe this is a source of the direct >> reclaim? > > I was thinking about this some more and THP being a source of reclaim > sounds quite unlikely. At least in a default configuration because we > shouldn't do anything expensinve in the #PF path. But there might be a > difference source of high order (!costly) allocations. Could you check > how many allocation requests like that you have on your system? > > mount -t debugfs none /debug > echo "order > 0" > /debug/tracing/events/kmem/mm_page_alloc/filter > echo 1 > /debug/tracing/events/kmem/mm_page_alloc/enable > cat /debug/tracing/trace_pipe > $file Just now or when PSI raises? Greets, Stefan
