From: Jens Axboe <axboe@suse.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Subject: Re: [PATCH] ide-dma blacklist behaviour broken
Date: Wed, 6 Oct 2004 16:41:52 +0200 [thread overview]
Message-ID: <20041006144152.GK3638@suse.de> (raw)
In-Reply-To: <1097069227.29255.2.camel@localhost.localdomain>
On Wed, Oct 06 2004, Alan Cox wrote:
> On Mer, 2004-10-06 at 06:45, Jens Axboe wrote:
> > > We should actually probably nuke most of the IDE blacklist, much of the
> > > CD-ROM blacklist arose because we DMA rather than PIO'd the ATAPI CDB.
> >
> > Hmm? When have we ever done that?
>
> 2.0, 2.2, 2.4 to about 2.4.18 or so (Khalid Aziz eventually pinned it
> down and fixed it).
Ah, I think you are misreading it. It wasn't the DMA'ing of the atapi
cdb, that was always pio'ed to the drive. But DMA for the command itself
was turned on before the cdb had been transferred.
--
Jens Axboe
next prev parent reply other threads:[~2004-10-06 14:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-05 14:20 [PATCH] ide-dma blacklist behaviour broken Jens Axboe
2004-10-05 15:37 ` Christoph Hellwig
2004-10-05 15:46 ` Jens Axboe
2004-10-05 22:46 ` Alan Cox
2004-10-06 5:45 ` Jens Axboe
2004-10-06 13:27 ` Alan Cox
2004-10-06 14:41 ` Jens Axboe [this message]
2004-10-06 13:58 ` Alan Cox
2004-10-06 15:01 ` Jens Axboe
2004-10-05 19:30 ` Juri Haberland
2004-10-10 0:42 ` Bartlomiej Zolnierkiewicz
2004-10-10 8:14 ` Jens Axboe
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