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Re: Synchronizing auxiliary mutex data
- From: Andreas Schwab <schwab at suse dot de>
- To: Andrew Pinski <pinskia at gmail dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 28 Jun 2017 09:17:23 +0200
- Subject: Re: Synchronizing auxiliary mutex data
- Authentication-results: sourceware.org; auth=none
- References: <mvmtw3cflej.fsf@suse.de> <CA+=Sn1kNf34GKQ+staJ-KbKHdVc0KqVBwWQRLQHBpUrOe8dvpw@mail.gmail.com>
On Jun 27 2017, Andrew Pinski <pinskia@gmail.com> wrote:
> On Mon, Jun 19, 2017 at 1:10 AM, Andreas Schwab <schwab@suse.de> wrote:
>> What is synchronizing the auxiliary data in pthread_mutex_t.__data
>> (__owner and __count) between threads?
>
> I suspect you are running into a problem where you are getting a
> deadlock and/or lock has happened on two different CPUs?
No. Something is reading stale data.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
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