linux-kernel - Re: [PATCH -rt] Preemption problem in kernel RT Patch

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Message-ID: <20070724191515.GC13268@elte.hu>
Date:	Tue, 24 Jul 2007 21:15:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Beauchemin, Mark" <Mark.Beauchemin@...amorenet.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH -rt] Preemption problem in kernel RT Patch


* Beauchemin, Mark <Mark.Beauchemin@...amorenet.com> wrote:

> I'm not sure why the check for recursion has been removed.  In the 
> backtrace below, I think it would be caught by this check and not 
> recursively call the spinlock code.

ah ... i think i did it like that because i didnt realize that there 
would be a recursive call sequence, i was concentrating on recursive 
locking.

incidentally, this code got cleaned up in .23-rc1-rt0, and now it looks 
quite similar to your suggested fix. Could you double-check that it 
solves your problem?

	Ingo
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