[CCing linux-mm] On Sun 25-12-16 21:52:52, Klaus Ethgen wrote: > Hello, > > The last days I compiled version 4.9 for my i386 laptop. (Lenovo x61s) Do you have memory cgroups enabled in runtime (aka does the same happen with cgroup_disable=memory)? > First, everything seems to be sane but after some sleep and awake > (suspend to ram) cycles I seen some really weird behaviour ending in OOM > or even complete freeze of the laptop. > > What I was able to see is that it went to swap even if there is plenty > of memory left. The OOMs was also with many memory left. Could you paste those OOM reports from the kernel log? > Once I also catched kswapd0 with running insane with 100% CPU > utilization. > > I first had in mind the CONFIG_SLAB_FREELIST_RANDOM setting and disabled > it. This didn't made the problem to go away but it helped a little. > Nevertheless, further OOM or other strange behaviour happened. > > I went back to 4.8.15 now with the same config from 4.9 and everything > gets back to normal. > > So it seems for me that there are some really strange memory leaks in > 4.9. The biggest problem is, that I do not know how to reproduce it > reliable. The only what I know is that it happened after several > suspends. (Not necessarily the first.) > > Am I the only one seeing that behavior or do anybody have an idea what > could went wrong? no there were some reports recently and 32b with memory cgroups are broken since 4.8 when the zone LRU's were moved to nodes. >x > For the reference I put the .configs of the two compilings as attachment > to this mail. > > Please keep me in CC as I am not subscribed to LKML. > > Regards > Klaus -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>