* Thomas Gleixner <[email protected]> wrote:
> +++ linux-2.6.22-rc4/kernel/rtmutex.c 2007-06-08 01:39:38.000000000 +0200
> @@ -189,6 +189,19 @@ int rt_mutex_adjust_prio_chain(struct ta
> if (!waiter || !waiter->task)
> goto out_unlock_pi;
>
> + /*
> + * Check the orig_waiter state. After we dropped the locks,
> + * the previous owner of the lock might have released the lock
> + * and made us the pending owner:
> + */
> + if (orig_waiter && !orig_waiter->task)
> + goto out_unlock_pi;
> +
> + /*
> + * Drop out, when the task has no waiters. Note,
> + * top_waiter can be NULL, when we are in the deboosting
> + * mode!
> + */
> if (top_waiter && (!task_has_pi_waiters(task) ||
> top_waiter != task_top_pi_waiter(task)))
> goto out_unlock_pi;
nice fix! I'm wondering why we never triggered this case with in-kernel
locks in -rt?
Acked-by: Ingo Molnar <[email protected]>
Ingo
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