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Re: Bug#479952: libc6/s390 - __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.

On Sat, Oct 25, 2008 at 1:21 PM, Julien Danjou <acid@debian.org> wrote:
> Is there anything from an outsider that could help?

I've seen this on-and-off again on the hppa-linux port. The issue has,
in my experience, been a compiler problem. My standard operating
procedure is to methodically add volatile to the atomic.h operations
until it goes away, and then work out the compiler mis-optimization.

The bug is almost always a situation where the lll_unlock is scheduled
before owner = 0, and the assert catches the race condition where you
unlock but have not yet cleared the owner.



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