Synchronizing auxiliary mutex data

[Andrew Pinski]

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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