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Date: Sat, 23 Apr 2016 19:10:48 +0200 From: Frederik Himpe <fhimpe@...enet.be> To: Michal Hocko <mhocko@...nel.org> Cc: linux-kernel@...r.kernel.org Subject: Re: 3.5.0: BUG: Bad page state in process Compositor pfn:16834f On za, 2016-04-16 at 16:29 -0400, Michal Hocko wrote: > On Sat 16-04-16 18:37:53, Frederik Himpe wrote: > > > > > > 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? I do not know how to reproduce this. I upgraded to 4.5.1, and with this kernel however I experienced already multiple hard freezes. I suspect they are the same problem, but there is nothing in the kernel logs. So 4.5 series is definitely unstable on this system. -- Frederik Himpe <fhimpe@...enet.be>
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