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Re: Synchronizing auxiliary mutex data
- From: Andrew Pinski <pinskia at gmail dot com>
- To: Andreas Schwab <schwab at suse dot de>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Tue, 27 Jun 2017 16:43:26 -0700
- Subject: Re: Synchronizing auxiliary mutex data
- Authentication-results: sourceware.org; auth=none
- References: <mvmtw3cflej.fsf@suse.de>
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?
Since mutex also depends on futex, what kernel version? RT full enabled?
If it a kernel version from sometime last year and RT full enabled you
might want to test
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbb26055defd03d59f678cb5f2c992abe05b064a
>
> Andreas.
>
> --
> Andreas Schwab, SUSE Labs, schwab@suse.de
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> "And now for something completely different."