On Sat 16-04-16 18:37:53, Frederik Himpe wrote: > With Linux 3.5.0 I suddenly had Firefox which suddenly seemed > to get stuck, and then I tried to kill it. I also noticed that > the ps aux command was hanging. Then I found this in my kernel > logs: > > > Apr 16 20:21:53 piranha kernel: [27926.414148] BUG: Bad page state in process > Compositor pfn:16834f > Apr 16 20:21:53 piranha kernel: [27926.414153] page:ffffea0005a0d3c0 count:0 > mapcount:0 mapping: (null) index:0x0 > Apr 16 20:21:53 piranha kernel: [27926.414155] flags: 0x1ffff8000000000()
Flags look weird > Apr 16 20:21:53 piranha kernel: [27926.414156] page dumped because: page > still charged to cgroup > Apr 16 20:21:53 piranha kernel: [27926.414157] > page->mem_cgroup:4000000000000000 And we think that the page is still charged because page->mem_cgroup != NULL. The value is not a pointer though. It seems like somebody is corrupting the struct page. Hard to tell who that might be though from the available information. This will be nasty to track down I am afraid. How reproducible is it? -- Michal Hocko SUSE Labs
