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Date: Fri, 16 Mar 2007 10:15:14 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Paulo Marques <pmarques@grupopie.com>
Cc: Ingo Molnar <mingo@elte.hu>, Alexey Dobriyan <adobriyan@sw.ru>,
       linux-kernel@vger.kernel.org, devel@openvz.org, tglx@linutronix.de,
       viro@zeniv.linux.org.uk, rusty@rustcorp.com.au
Subject: Re: [PATCH RESEND 2/2] Fix some kallsyms_lookup() vs rmmod races
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On Fri, 16 Mar 2007 17:16:39 +0000 Paulo Marques <pmarques@grupopie.com> wrote:

> Does freeze_processes() / unfreeze_processes() solve this by only 
> freezing processes that have voluntarily scheduled (opposed to just 
> being preempted)?

It goes much much further than that.  Those processes need to actually
perform an explicit call to try_to_freeze().