* john stultz <[email protected]> wrote:
> So we've been seeing PI mutex deadlocks with a few of our
> applications using the -rt kernel. After narrowing things down, we
> were finding that the applications were indirectly calling
> futex_unlock_pi(), which on occasion would return -EFAULT, which is
> promptly ignored by glibc. This would cause the application to
> continue on as if it has unlocked the mutex, until it tried to
> reacquire it and deadlock.
> --- a/kernel/futex.c
> +++ b/kernel/futex.c
> @@ -2011,6 +2011,7 @@ pi_faulted:
> attempt);
> if (ret)
> goto out_unlock;
> + uval = 0;
> goto retry_locked;
this looks good to me. Oleg has posted a few more fixes as well - have
you tried those too?
Ingo
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