linux-kernel - Re: [PATCH] fix rcu vs hotplug race

lists.openwall.net		lists / announce john-users owl-users popa3d-users / xvendor oss-security / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4
Open Source and information security mailing list archives

This website is powered by Openwall GNU/*/Linux security-enhanced OS

[<prev] [next>] [<thread-prev] [thread-next>] [month] [year] [list]

Date:	Tue, 1 Jul 2008 11:58:54 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] fix rcu vs hotplug race

On Tue, Jul 01, 2008 at 08:16:01AM +0200, Ingo Molnar wrote:
> 
> * Gautham R Shenoy <ego@...ibm.com> wrote:
> 
> > So, it's the design of stop_machine() that's preventing someone from 
> > updating the cpu_online_map while force_quiescent_state() is 
> > performing the cpu_is_online() check. Becase we always call 
> > force_quiescent_state() with irqs disabled :)
> 
> Paul, do you concur? I'll apply the commit in the form below to 
> tip/core/urgent if Paul agrees.
> 
> 	Ingo

Ingo,

I believe Gautham's fix at http://lkml.org/lkml/2008/6/27/9 is better
and also explains it better.

Thanks.
-- 
regards,
Dhaval
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/