From: Arjan van de Ven <arjanv@redhat.com>
To: tsuchiya yoshihiro <yt@labs.fujitsu.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: SLEEP_ON_BKLCHECK
Date: Thu, 14 Apr 2005 08:46:30 +0200 [thread overview]
Message-ID: <1113461190.6293.1.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <425DBC76.60804@labs.fujitsu.com>
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On Thu, 2005-04-14 at 09:42 +0900, tsuchiya yoshihiro wrote:
> Hi,
> In Fedora Core3, interruptible_sleep_on() checks if the system is
> lock_kernel()'ed
> by SLEEP_ON_BKLCHECK. Same thing is done in RedHatEL4.
> Also I found a patch including SLEEP_ON_BKLCHECK was posted before,
> but is not included in 2.6.11.
> Why SLEEP_ON_BKLCHECK checks lock_kernel ?
Because you really need to hold the BKL when you call sleep_on() family
of APIs, otherwise you have a very big race.
Also note that you in your code really should not call any of the
sleep_on() family of functions at all! It is a very very deprecated and
defective API!!!!
Can you give the URL to the code where you use this in?
(it is GPL code, right?)
Greetings,
Arjan van de Ven
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next prev parent reply other threads:[~2005-04-14 6:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-14 0:42 SLEEP_ON_BKLCHECK tsuchiya yoshihiro
2005-04-14 6:46 ` Arjan van de Ven [this message]
2005-04-14 7:17 ` SLEEP_ON_BKLCHECK tsuchiya yoshihiro
2005-04-14 7:21 ` SLEEP_ON_BKLCHECK Arjan van de Ven
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