On 11/16/2016 02:39 PM, E V wrote: > System panic'd overnight running 4.9rc5 & rsync. Attached a photo of > the stack trace, and the 38 call traces in a 2 minute window shortly > before, to the bugzilla case for those not on it's e-mail list: > > https://bugzilla.kernel.org/show_bug.cgi?id=186671 The panic screenshot has only the last part, but the end marker says it's OOM with no killable processes. The DEBUG_VM config thus didn't trigger anything, and still there's tons of pagecache, mostly clean, that's not being reclaimed. Could you now try this? - enable CONFIG_PAGE_OWNER - boot with kernel option: page_owner=on - after the first oom, "cat /sys/kernel/debug/page_owner > file" - provide the file (compressed, it will be quite large) Vlastimil -- 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>