From: Arjan van de Ven <arjan@infradead.org>
To: liu pf <kernelfans@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Should we use preempt_disable() in sleep_on_common()?
Date: Wed, 2 Dec 2009 23:07:46 -0800 [thread overview]
Message-ID: <20091202230746.611f7fc5@infradead.org> (raw)
In-Reply-To: <563a732e0912022249y1e831c6cv7f2d5d376b8a5f63@mail.gmail.com>
On Thu, 3 Dec 2009 14:49:14 +0800
liu pf <kernelfans@gmail.com> wrote:
> Hi:
>
> I am puzzled with the following scenario. Could anyone enlighten me?
sleep_on family of APIs is very racy and just cannot be used correctly;
I'm not surprised that there's a preempt race in it, but trust me, it's
not the biggest race... never ever use these APIs!!!
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2009-12-03 7:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-03 6:49 liu pf
2009-12-03 7:07 ` Arjan van de Ven [this message]
2009-12-03 7:12 ` Dmitry Torokhov
2009-12-03 7:15 ` Dmitry Torokhov
2009-12-03 8:15 ` liu pf
2009-12-03 8:22 ` Dmitry Torokhov
2009-12-03 8:53 ` liu pf
2009-12-03 7:57 ` Dmitry Adamushko
2009-12-03 8:01 ` liu pf
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