Hi, Sorry for the delay. I had time to do a full system upgrade yesterday evening and fortunately Archlinux already ships 5.10.10, today I used my computer as usual to test it. I haven't experienced the symptoms, but since I disabled transparent huge pages it showed up sporadically. If I face it again I will let you know.
On Tue, Jan 26, 2021 at 10:17 AM Mel Gorman <[email protected]> wrote: > > On Mon, Jan 25, 2021 at 07:54:38PM +0100, Tibor Bana wrote: > > Greetings! > > > > I don't know if it still actual, but I am strugling with this problem right > > now and searching the internet for solutions. > > I read the thread and saw that you are strugling to reproduce the problem, > > and I can reproduce it almost every day. > > > > - Install vmware player, and a linux guest. > > - Configure the virtual machine to have a good amount of memory and cpu > > - run resource intensive tasks on the guest > > - when the host used up almost it's all memory and start to reuse caches > > kcompactd will kick in. > > > > As I know the problem is related to transparent huge pages, but I tried to > > disable it. > > Today I saw the problem again and kcompactd shown an interesting status in > > top. It hasn't used any memory, all zeroes but it used up one core > > completely. > > > > My machine is a core-i7 with 4 physical cores and hyper threading and 24GB > > Memory > > 5.9.11-arch2-1 #1 SMP PREEMPT Sat, 28 Nov 2020 02:07:22 +0000 x86_64 > > GNU/Linux > > > > Hope this can help, to point out the problem. > > > > Is 5.10.10 affected because it included two patches related to halting > compaction that are relevant. > > d20bdd571ee5c9966191568527ecdb1bd4b52368 mm/compaction: stop isolation if too > many pages are isolated and we have pages to migrate > 38935861d85a4d9a353d1dd5a156c97700e2765d mm/compaction: count pages and stop > correctly during page isolation > > -- > Mel Gorman > SUSE Labs
