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From: Dhaval Giani <dhaval@linux.vnet.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Gautham R Shenoy <ego@in.ibm.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@in.ibm.com>,
	laijs@cn.fujitsu.com, Peter Zijlstra <a.p.zijlstra@chello.nl>,
	lkml <linux-kernel@vger.kernel.org>,
	Rusty Russel <rusty@rustcorp.com.au>
Subject: Re: [PATCH] fix rcu vs hotplug race
Date: Tue, 1 Jul 2008 11:58:54 +0530	[thread overview]
Message-ID: <20080701062854.GD6131@linux.vnet.ibm.com> (raw)
In-Reply-To: <20080701061600.GF14658@elte.hu>

On Tue, Jul 01, 2008 at 08:16:01AM +0200, Ingo Molnar wrote:
> 
> * Gautham R Shenoy <ego@in.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

  reply	other threads:[~2008-07-01  6:29 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-23 10:37 [PATCH] fix rcu vs hotplug race Dhaval Giani
2008-06-23 10:58 ` Ingo Molnar
2008-06-23 11:49   ` Gautham R Shenoy
2008-06-24 11:01     ` Ingo Molnar
2008-06-26 15:27       ` Paul E. McKenney
2008-06-27  4:47         ` Gautham R Shenoy
2008-06-27  5:18           ` Dipankar Sarma
2008-06-27  5:49             ` Dhaval Giani
2008-06-27 14:58               ` Paul E. McKenney
2008-07-01  5:39                 ` Gautham R Shenoy
2008-07-01  6:16                   ` Ingo Molnar
2008-07-01  6:28                     ` Dhaval Giani [this message]
2008-07-01  6:35                       ` Ingo Molnar
2008-07-01  6:52                         ` Ingo Molnar
2008-07-01  7:48                           ` Ingo Molnar
2008-07-01  8:32                             ` Ingo Molnar
2008-07-01 19:46                   ` Paul E. McKenney
2008-08-01 21:01                   ` Paul E. McKenney

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