On Thursday 12 of November 2015, Tetsuo Handa wrote: > On 2015/11/12 15:06, Arkadiusz Miśkiewicz wrote: > > On Wednesday 11 of November 2015, Tetsuo Handa wrote: > >> Arkadiusz Mi?kiewicz wrote: > >>> This patch is against which tree? (tried 4.1, 4.2 and 4.3) > >> > >> Oops. Whitespace-damaged. This patch is for vanilla 4.1.2. > >> Reposting with one condition corrected. > > > > Here is log: > > > > http://ixion.pld-linux.org/~arekm/log-mm-1.txt.gz > > > > Uncompresses is 1.4MB, so not posting here. > > Thank you for the log. The result is unexpected for me. [...] > > vmstat_update() and submit_flushes() remained pending for about 110 > seconds. If xlog_cil_push_work() were spinning inside GFP_NOFS allocation, > it should be reported as MemAlloc: traces, but no such lines are recorded. > I don't know why xlog_cil_push_work() did not call schedule() for so long. > Anyway, applying > http://lkml.kernel.org/r/20151111160336.GD1432@xxxxxxxxxxxxxx should solve > vmstat_update() part. To apply that patch on top of 4.1.13 I also had to apply patches listed below. So in summary appllied: http://sprunge.us/GYBb http://sprunge.us/XWUX http://sprunge.us/jZjV (Could try http://lkml.kernel.org/r/20151111160336.GD1432@xxxxxxxxxxxxxx only if there is version for 4.1 tree somewhere) commit 0aaa29a56e4fb0fc9e24edb649e2733a672ca099 Author: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Date: Fri Nov 6 16:28:37 2015 -0800 mm, page_alloc: reserve pageblocks for high-order atomic allocations on demand commit 974a786e63c96a2401a78ddba926f34c128474f1 Author: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Date: Fri Nov 6 16:28:34 2015 -0800 mm, page_alloc: remove MIGRATE_RESERVE commit c2d42c16ad83006a706d83e51a7268db04af733a Author: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Date: Thu Nov 5 18:48:43 2015 -0800 mm/vmstat.c: uninline node_page_state() commit 176bed1de5bf977938cad26551969eca8f0883b1 Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Date: Thu Oct 15 13:01:50 2015 -0700 vmstat: explicitly schedule per-cpu work on the CPU we need it to run on [...] > > Well, what steps should we try next for isolating the problem? > > Swap is not used at all. Turning off swap might help. Disabled swap. > > [ 8633.753574] Free swap = 117220800kB > [ 8633.753576] Total swap = 117220820kB > > Turning off perf might also help. > > [ 5001.394085] perf interrupt took too long (2505 > 2495), lowering > kernel.perf_event_max_sample_rate to 50100 Didn't find a way to disable perf. kernel .config option gets autoenabled by some dependency. So left this untouched. With mentioned patches I wasn't able to reproduce memory allocation problem (still trying though). Current debug log: http://ixion.pld-linux.org/~arekm/log-mm-2.txt.gz -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
