|Summary:||2.6.28-rc4 mem_cgroup_charge_common panic|
|Product:||Memory Management||Reporter:||Rafael J. Wysocki (rjw)|
|Component:||Other||Assignee:||KAMEZAWA Hiroyuki (kamezawa.hiroyu)|
|Bug Depends on:|
Description Rafael J. Wysocki 2008-11-15 15:32:54 UTC
Subject : 2.6.28-rc4 mem_cgroup_charge_common panic Submitter : Badari Pulavarty <firstname.lastname@example.org> Date : 2008-11-10 21:43 References : http://marc.info/?l=linux-kernel&m=122635343008147&w=4 Handled-By : KAMEZAWA Hiroyuki <email@example.com> This entry is being used for tracking a regression from 2.6.27. Please don't close it until the problem is fixed in the mainline.
Comment 1 KAMEZAWA Hiroyuki 2008-11-16 16:03:10 UTC
It seems than memory cgroup's support for memory-hotplug is not good. Can be avoided when memcg is not used (by config or boot option). In my test box, x86-64 which doesn't have physical memory hotplug feature, I can't reproduce the issue. Just online/offline memory doesn't show panic. Some bugfix patches (from review) are in mmotm and I'm now looking for how to test. Thanks, -Kame
Comment 2 Badari Pulavarty 2008-11-17 13:32:02 UTC
Kame's patch to change init_section_page_cgroup() seems to have fixed this problem. This is on top of mmotm. Tests ran fine over the weekend (60+ hours).
Comment 3 Rafael J. Wysocki 2008-11-22 13:40:04 UTC
Can you provide a pointer to the patch, please?
Comment 4 Rafael J. Wysocki 2008-11-22 13:42:05 UTC
Never mind. :-) Fixed by commit 33c5d3d64589c5d379db5a5615735f6d08438369 .
Comment 5 Badari Pulavarty 2008-11-25 15:29:24 UTC
Hmm.. I see this problem again on 2.6.28-rc6. Did the fix ever made into mainline ?
Comment 6 Rafael J. Wysocki 2008-11-25 16:42:55 UTC
Apparently it did, so it was not a fix. :-(
Comment 7 Rafael J. Wysocki 2008-12-03 15:28:47 UTC