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From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Linux RT question - __up_mutex calling pi_setprio
Date: Fri, 25 Feb 2005 22:24:22 -0500	[thread overview]
Message-ID: <1109388262.1452.44.camel@localhost.localdomain> (raw)

Hi Ingo,

I have a couple of questions about __up_mutex in rt.c. I'm still using
RT-V0.7.38-06 and this may have changed. I haven't checked.

1) can old_owner ever not be the same as current. IOW can a process
unlock a lock owned by another process?

2) Is it really necessary to call pi_setprio on the old_owner (I guess
if the previous question is true, then this would be too).  If the
process is unlocking a lock, I don't expect it to be also blocked on a
lock so it would not need to iterate the priority list. Wouldn't just
calling mutex_setprio be sufficient?

Thanks,

-- Steve



                 reply	other threads:[~2005-02-26  3:26 UTC|newest]

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