linux-kernel - Re: [PATCH -rt] mm: protect activate_mm() by preempt_[disable|enable]

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Message-ID: <1337133410.6724.25.camel@gandalf.stny.rr.com>
Date:	Tue, 15 May 2012 21:56:50 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Yong Zhang <yong.zhang0@...il.com>
Cc:	Josh Cartwright <joshc@...ux.com>, linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH -rt] mm: protect activate_mm() by
 preempt_[disable|enable]_rt()

On Wed, 2012-05-16 at 09:38 +0800, Yong Zhang wrote:
> On Tue, May 15, 2012 at 05:36:19PM -0400, Josh Cartwright wrote:
> > Frank Rowand posted a very similar fix in December of last year that
> > we've been carrying to fix the same issue:
> > 
> >    http://permalink.gmane.org/gmane.linux.kernel/1229806
> > 
> > It looks like there was some deliberation as to whether or not it should
> > be pulled into stable-rt.  Perhaps its time to revisit this discussion?
> 
> Yeah, thanks for pointing it out, I didn't know there is discussion about
> it.
> 

I believe we can go with Yong's patch. I don't think the #ifdef is
necessary. Just do the preempt_disable_rt().

-- Steve


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