On Monday 16 of November 2015, Michal Hocko wrote: > On Sun 15-11-15 15:49:35, Arkadiusz Miśkiewicz wrote: > > On Sunday 15 of November 2015, Tetsuo Handa wrote: > > > Arkadiusz Miskiewicz wrote: > > > > On Sunday 15 of November 2015, Tetsuo Handa wrote: > > > > > I think that the vmstat statistics now have correct values. > > > > > > > > > > > But are these patches solving the problem or just hiding it? > > > > > > > > > > Excuse me but I can't judge. > > > > > > > > > > If you are interested in monitoring how vmstat statistics are > > > > > changing under stalled condition, you can try below patch. > > > > > > > > Here is log with this and all previous patches applied: > > > > http://ixion.pld-linux.org/~arekm/log-mm-5.txt.gz > > > > > > Regarding "Node 0 Normal" (min:7104kB low:8880kB high:10656kB), > > > all free: values look sane to me. I think that your problem was solved. > > > > Great, thanks! > > > > Will all (or part) of these patches > > > > http://sprunge.us/GYBb > > Migrate reserves are not a stable material I am afraid. "vmstat: > explicitly schedule per-cpu work on the CPU we need it to run on" > was not marked for stable either but I am not sure why it should make > any difference for your load. I understand that testing this is really > tedious but it would be better to know which of the patches actually > made a difference. Ok. In mean time I've tried 4.3.0 kernel + patches (the same as before + one more) on second server which runs even more rsnapshot processes and also uses xfs on md raid 6. Patches: http://sprunge.us/DfIQ (debug patch from Tetsuo) http://sprunge.us/LQPF (backport of things from git + one from ml) The problem is now with high order allocations probably: http://ixion.pld-linux.org/~arekm/log-mm-2srv-1.txt.gz System is doing very slow progress and for example depmod run took 2 hours http://sprunge.us/HGbE Sometimes I was able to ssh-in, dmesg took 10-15 minutes but sometimes it worked fast for short period. Ideas? ps. I also had one problem with low order allocation but only once and wasn't able to reproduce so far. I was running kernel with backport patches but no debug patch, so got only this in logs: http://sprunge.us/WPXi -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
