linux-kernel - Re: Use of mutex in interrupt context flawed/impossible, need advice.

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Message-ID: <20071122174936.75c8e65c@brian.englab.brq.redhat.com>
Date:	Thu, 22 Nov 2007 17:49:36 +0100
From:	Michal Schmidt <mschmidt@...hat.com>
To:	"Leon Woestenberg" <leon.woestenberg@...il.com>
Cc:	"Oliver Neukum" <oliver@...kum.org>, linux-kernel@...r.kernel.org
Subject: Re: Use of mutex in interrupt context flawed/impossible, need
 advice.

On Thu, 22 Nov 2007 17:19:44 +0100
"Leon Woestenberg" <leon.woestenberg@...il.com> wrote:

> I forgot to mention that I would like to be prepared for, and use the
> -rt patch soon. I understand (maybe wrongly?) that semaphores are not
> real-time pre-emptible, mutexes and spinlocks are.

Semaphores are preemptible, but they don't do priority inheritance.

Michal
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