2015-12-14 13:05 GMT+03:00 Michal Hocko <mhocko@xxxxxxx>: > On Mon 14-12-15 11:24:33, Kirill A. Shutemov wrote: >> On Thu, Dec 10, 2015 at 05:48:01PM +0200, Mika Westerberg wrote: >> > Hi Kirill, >> > >> > I got following crash on my desktop machine while building swift. It >> > reproduces pretty easily on 4.4-rc4. >> > >> > Before it happens the ld process is killed by OOM killer. I attached the >> > whole dmesg. >> > >> > [ 254.740603] page:ffffea00111c31c0 count:2 mapcount:0 mapping: (null) index:0x0 >> > [ 254.740636] flags: 0x5fff8000048028(uptodate|lru|swapcache|swapbacked) >> > [ 254.740655] page dumped because: VM_BUG_ON_PAGE(!PageLocked(page)) >> > [ 254.740679] ------------[ cut here ]------------ >> > [ 254.740690] kernel BUG at mm/memcontrol.c:5270! >> >> >> Hm. I don't see how this can happen. > > What a coincidence. I have just posted a similar report: > http://lkml.kernel.org/r/20151214100156.GA4540@xxxxxxxxxxxxxx except I > have hit the VM_BUG_ON from a different path. My suspicion is that > somebody unlocks the page while we are waiting on the writeback. > I am trying to reproduce this now. Guys, this is fixed in rc5 - dfd01f026058a ("sched/wait: Fix the signal handling fix"). http://lkml.kernel.org/r/<20151212162342.GF11257@xxxxxxxxxxxxxxxxxxx> -- 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>