On 02/28/2013 09:46 AM, Petr Cervenka wrote:
> Hello.
>
> I have a problem with a mutex shared by 3 real-time user tasks. Once in a
> while (~hours) the mutex get locked with the first task as owner and the
> other two tasks are fronzen on rt_mutex_aquire calls. But I have double
> checked, that every "acquire" of that mutex is followed by "release".
>
> Typical example:
> Lets call those tasks REG, SEND, RECEIVE
>
> RECV: acquire
> RECV: release
>
> RECV: acquire
> RECV: release
>
> RECV: acquire - FREEZE
>
> REG: acquire
> REG: release
>
> REG: acquire
> REG: release
>
> REG: acquire
> REG: release
>
> SEND: acquire - FREEZE
>
> There are also other threads, sync. objects, network sockets, ... in the
> system, but the threads are frozen by this particular mutex.
> rt_task_unblock call unblocks the tasks, return value of rt_mutex_acquire is
> -4 (-EINTR), as expected.
> Used version of Xenomai 2.5.6, skin native. Was there any known issue similar
> to that behavior?
> Also it seems that rt_mutex_create is called before mlockall call? Could it
> be a problem?
It is a bit old to recall. Could you try and reproduce the problem with
2.6.2.1 ?
--
Gilles.
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