From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Joe Korty <joe.korty@ccur.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] bug in 2.4 bh_kmap_irq() breaks IDE under preempt patch
Date: 12 Mar 2003 23:27:28 +0000 [thread overview]
Message-ID: <1047511647.23902.29.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <200303122213.WAA17415@rudolph.ccur.com>
On Wed, 2003-03-12 at 22:13, Joe Korty wrote:
> The bug is that bh_map_irq *conditionally* calls kmap_atomic (which
> disables preemption as one of its functions), while bh_unmap_irq
> *unconditionally* calls kunmap_atomic (which enables it). This
Thats a pre-empt bug ont a bh_map_irq bug. I'm glad you've found it
however. It explains a few things and will be useful for people wanting
pre-empt 2.4 .
next prev parent reply other threads:[~2003-03-12 22:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 22:13 Joe Korty
2003-03-12 23:27 ` Alan Cox [this message]
2003-03-13 9:26 ` Jens Axboe
2003-03-13 10:26 ` Marc-Christian Petersen
2003-03-13 10:28 ` Jens Axboe
2003-03-13 11:50 ` Marc-Christian Petersen
2003-03-13 14:59 ` Joe Korty
2003-03-13 15:05 ` Jens Axboe
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