Messages in this thread | | | Date | Thu, 17 Feb 2011 17:35:31 +0100 | From | Ingo Molnar <> | Subject | Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 |
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* Linus Torvalds <torvalds@linux-foundation.org> wrote:
> And in addition, I don't see why others wouldn't see it (I've got > DEBUG_PAGEALLOC and SLUB_DEBUG_ON turned on myself, and I know others > do too).
I've done extensive randconfig testing and no crash triggers for typical workloads on a typical dual-core PC. If there's a generic crashes in there my tests tend to trigger them at least 10x as often as regular testers ;-) But the tests are still only statistical so the race could simply be special and missed by the tests.
> So I'm wondering what triggers it. Must be something subtle.
I think what Michal did before he got the corruption seemed somewhat atypical: suspend/resume and udevd wifi twiddling, right?
Now, Eric's crashes look similar - and he does not seem to have done anything special to trigger the crashes.
Eric, could you possibly describe your system in a bit more detail, does it do suspend and does the box use wifi actively? Anything atypical in your setup or usage that doesnt match a bog-standard whitebox PC with LAN? Swap to file? NFS? FUSE? Anything that is even just borderline atypical.
Thanks,
Ingo
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