On Thu, 2007-05-31 at 16:24 +0200, Ingo Molnar wrote: > * 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?
Do you have a URL or subject line for the discussion? I'll take a look and give them a whirl. thanks -john - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
