Date: Wed, 15 Aug 2007 12:41:29 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Nex Mon <sugarfreemonkey@gmail.com> Subject: Re: questions on nonsleepable lock Message-ID: <200708151241.29534.jhb@freebsd.org> In-Reply-To: <1fc8a2a60708142327p3f9ff079l345d47f9ceb6f489@mail.gmail.com> References: <1fc8a2a60708142327p3f9ff079l345d47f9ceb6f489@mail.gmail.com>
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On Wednesday 15 August 2007 02:27:56 am Nex Mon wrote: > Hello All, > > Can someone point me out or explain the technical details of this kernel > panic: > > sleeping thread (tid 100093, pid 2676) owns nonsleepable lock > panic: sleeping thread > -- > -- > > > Is this caused by incorrect use of mutex or semaphores? Is this > related to kernel scheduling? Can this be addressed at the > user process? I've tried looking throught the freebsd mailing list > archives and documentations but coudn't find a real good answer to > solve or prevent this problem. > > Im using freebsd 6.1 with SMP enabled on a Xeon dual core hardware. The > system has several busy applications running, But the load average is very > minimal, around 8.55 and no process hogging the CPU. So I expect my system > should be running smoothly without in problem. > > I appreciate any help. I know there was at least one bug that could result in this, but the root cause was either a deadlock or use after free, etc. It should be fixed in 6-stable. I can't recall further what it is though. -- John Baldwin
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