From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: linux-kernel@vger.kernel.org,
Dipankar Sarma <dipankar@in.ibm.com>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
Date: Fri, 9 Dec 2005 08:26:54 +0530 [thread overview]
Message-ID: <20051209025654.GA29806@in.ibm.com> (raw)
In-Reply-To: <439889FA.BB08E5E1@tv-sign.ru>
On Thu, Dec 08, 2005 at 10:31:06PM +0300, Oleg Nesterov wrote:
> I think cpu should call cpu_quiet() after adding itself to nohz mask
> to eliminate this race.
That would require rsp->lock to be taken on every idle CPU that wishes to go
tickless. IMO that may not be a good idea.
--
Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017
next prev parent reply other threads:[~2005-12-09 2:56 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-08 19:31 [PATCH] Fix RCU race in access of nohz_cpu_mask Oleg Nesterov
2005-12-09 2:46 ` Srivatsa Vaddagiri
2005-12-09 19:17 ` Oleg Nesterov
2005-12-10 15:19 ` Srivatsa Vaddagiri
2005-12-10 18:55 ` Oleg Nesterov
2005-12-11 17:41 ` Semantics of smp_mb() [was : Re: [PATCH] Fix RCU race in access of nohz_cpu_mask ] Srivatsa Vaddagiri
2005-12-11 21:21 ` Andrew James Wade
2005-12-11 23:45 ` Rusty Russell
2005-12-12 0:49 ` Keith Owens
2005-12-12 8:41 ` Srivatsa Vaddagiri
2005-12-12 19:33 ` Oleg Nesterov
2005-12-13 5:20 ` Paul E. McKenney
2005-12-13 5:07 ` Andrew James Wade
2005-12-13 5:43 ` Paul E. McKenney
2005-12-13 11:20 ` Andi Kleen
2005-12-13 16:20 ` Paul E. McKenney
2005-12-13 22:27 ` Keith Owens
2005-12-13 22:50 ` Paul E. McKenney
2005-12-14 1:12 ` Andi Kleen
2005-12-14 1:46 ` Paul E. McKenney
2005-12-15 21:15 ` Semantics of smp_mb() Roland Dreier
2005-12-16 7:46 ` Semantics of smp_mb() [was : Re: [PATCH] Fix RCU race in access of nohz_cpu_mask ] Jeremy Higdon
2006-03-13 18:39 ` Paul E. McKenney
2006-03-31 4:56 ` Jeremy Higdon
2006-03-31 6:18 ` Paul E. McKenney
2006-03-31 23:38 ` Jesse Barnes
2005-12-12 3:10 ` [PATCH] Fix RCU race in access of nohz_cpu_mask Paul E. McKenney
2005-12-12 4:32 ` Andrew Morton
2005-12-12 4:38 ` David S. Miller
2005-12-12 4:47 ` Nick Piggin
2005-12-12 4:49 ` Paul Mackerras
2005-12-12 6:27 ` Keith Owens
2005-12-09 2:56 ` Srivatsa Vaddagiri [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-12-05 11:02 Srivatsa Vaddagiri
2005-12-08 0:37 ` Andrew Morton
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