Messages in this thread | | | Date | Tue, 29 Apr 2014 15:29:04 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: [BUG] kernel BUG at mm/vmacache.c:85! |
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On 04/29/2014 03:55 AM, Linus Torvalds wrote: > On Mon, Apr 28, 2014 at 3:14 PM, Davidlohr Bueso <davidlohr@hp.com> wrote: >> >> I think that returning some stale/bogus vma is causing those segfaults >> in udev. It shouldn't occur in a normal scenario. What puzzles me is >> that it's not always reproducible. This makes me wonder what else is >> going on... > > I've replaced the BUG_ON() with a WARN_ON_ONCE(), and made it be > unconditional (so you don't have to trigger the range check). > > That might make it show up earlier and easier (and hopefully closer to > the place that causes it). Maybe that makes it easier for Srivatsa to > reproduce this. It doesn't make *my* machine do anything different, > though. > > Srivatsa? It's in current -git. >
I tried this, but still nothing so far. I rebooted 10-20 times, and also tried multiple runs of multi-threaded ebizzy and kernel compilations, but none of this hit the warning.
Is there anything more specific I can run to increase the chances of hitting this? I guess a test-case might be too much to ask since I'm the first one hitting this, but if anybody has suggestions of scenarios which have a higher likelihood of hitting this (like running multi- threaded workloads or whatever), I could probably give it a try as well.
Thank you!
Regards, Srivatsa S. Bhat
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