On Sun, Apr 17, 2016 at 2:53 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > On Fri 15-04-16 15:31:22, Rik van Riel wrote: >> On Fri, 2016-04-15 at 12:15 -0700, Andrew Morton wrote: >> > (switched to email. Please respond via emailed reply-to-all, not via >> > the >> > bugzilla web interface). >> > >> > This is ... interesting. >> >> First things first. What is the value of >> /proc/sys/vm/zone_reclaim? > > Also snapshots of /proc/vmstat taken every 1s or so while you see the > trashing would be helpful. It's been so long since I reported this bug that I don't recall exactly what I was doing. I think I was running Synopsys. I tried artificially reproducing this by just allocating a huge amount of memory and touching all the pages, but the problem didn't manifest. I wonder if Synopsys was allocating pages it didn't touch or mmaping files or some other weird thing. > -- > Michal Hocko > SUSE Labs -- Timothy Normand Miller, PhD Assistant Professor of Computer Science, Binghamton University http://www.cs.binghamton.edu/~millerti/ Open Graphics Project -- 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>