On Mon 26-12-16 19:57:03, Nils Holland wrote: > On Mon, Dec 26, 2016 at 01:48:40PM +0100, Michal Hocko wrote: > > On Fri 23-12-16 23:26:00, Nils Holland wrote: > > > On Fri, Dec 23, 2016 at 03:47:39PM +0100, Michal Hocko wrote: > > > > > > > > Nils, even though this is still highly experimental, could you give it a > > > > try please? > > > > > > Yes, no problem! So I kept the very first patch you sent but had to > > > revert the latest version of the debugging patch (the one in > > > which you added the "mm_vmscan_inactive_list_is_low" event) because > > > otherwise the patch you just sent wouldn't apply. Then I rebooted with > > > memory cgroups enabled again, and the first thing that strikes the eye > > > is that I get this during boot: > > > > > > [ 1.568174] ------------[ cut here ]------------ > > > [ 1.568327] WARNING: CPU: 0 PID: 1 at mm/memcontrol.c:1032 mem_cgroup_update_lru_size+0x118/0x130 > > > [ 1.568543] mem_cgroup_update_lru_size(f4406400, 2, 1): lru_size 0 but not empty > > > > Ohh, I can see what is wrong! a) there is a bug in the accounting in > > my patch (I double account) and b) the detection for the empty list > > cannot work after my change because per node zone will not match per > > zone statistics. The updated patch is below. So I hope my brain already > > works after it's been mostly off last few days... > > I tried the updated patch, and I can confirm that the warning during > boot is gone. Also, I've tried my ordinary procedure to reproduce my > testcase, and I can say that a kernel with this new patch also works > fine and doesn't produce OOMs or similar issues. > > I had the previous version of the patch in use on a machine non-stop > for the last few days during normal day-to-day workloads and didn't > notice any issues. Now I'll keep a machine running during the next few > days with this patch, and in case I notice something that doesn't look > normal, I'll of course report back! Thanks for your testing! Can I add your Tested-by: Nils Holland <nholland@xxxxxxxxx> ? -- 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>