From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@osdl.org>,
Oleg Nesterov <oleg@tv-sign.ru>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: PATCH? hrtimer_wakeup: fix a theoretical race wrt rt_mutex_slowlock()
Date: Tue, 07 Nov 2006 07:53:53 +1100 [thread overview]
Message-ID: <1162846433.28571.341.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.58.0611060732020.14553@gandalf.stny.rr.com>
On Mon, 2006-11-06 at 07:35 -0500, Steven Rostedt wrote:
> It is relevant. In powerpc, can one write happen before another write?
>
>
> x = 1;
> barrier(); (only compiler barrier)
> b = 2;
>
>
> And have CPU 2 see b=2 before seeing x=1?
Yes. Definitely.
> If so, then I guess this is indeed a bug on powerpc.
Ben.
next prev parent reply other threads:[~2006-11-06 20:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-05 19:34 PATCH? hrtimer_wakeup: fix a theoretical race wrt rt_mutex_slowlock() Oleg Nesterov
2006-11-05 22:29 ` Linus Torvalds
2006-11-05 22:53 ` Steven Rostedt
2006-11-05 23:08 ` Oleg Nesterov
2006-11-06 3:08 ` Linus Torvalds
2006-11-06 12:09 ` Oleg Nesterov
2006-11-06 12:26 ` Steven Rostedt
2006-11-05 22:53 ` Oleg Nesterov
2006-11-06 8:57 ` Benjamin Herrenschmidt
2006-11-06 12:35 ` Steven Rostedt
2006-11-06 20:53 ` Benjamin Herrenschmidt [this message]
2006-11-06 21:17 ` Steven Rostedt
2006-11-06 21:41 ` Benjamin Herrenschmidt
2006-11-06 12:31 ` Steven Rostedt
2006-11-06 14:15 ` Oleg Nesterov
2006-11-06 14:11 ` Steven Rostedt
2006-11-06 15:05 ` Steven Rostedt
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