On Fri 02-10-15 06:36:57, Guenter Roeck wrote: > On 10/01/2015 01:49 PM, Andrew Morton wrote: > >On Thu, 1 Oct 2015 09:06:15 -0700 Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > > >>Seen with next-20151001, running qemu, simulating Opteron_G1 with a non-SMP configuration. > >>On a re-run, I have seen it with the same image, but this time when simulating IvyBridge, > >>so it is not CPU dependent. I did not previously see the problem. > >> > >>Log is at > >>http://server.roeck-us.net:8010/builders/qemu-x86-next/builds/259/steps/qemubuildcommand/logs/stdio > >> > >>I'll try to bisect. The problem is not seen with every boot, so that may take a while. > > > >Caused by mhocko's "mm, fs: obey gfp_mapping for add_to_page_cache()", > >I expect. > > > I tried to bisect to be sure, but the problem doesn't happen often enough, and I got some > false negatives. I assume bisect is no longer necessary. If I need to try again, please > let me know. The updated patch has been posted here: http://lkml.kernel.org/r/20151002085324.GA2927%40dhcp22.suse.cz Andrew's analysis seems decent so I am pretty sure it should fix the issue. -- 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>