From: Jens Axboe <axboe@suse.de>
To: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Christophe Saout <christophe@saout.de>,
linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Possibly wrong BIO usage in ide_multwrite
Date: Mon, 5 Jan 2004 17:49:02 +0100 [thread overview]
Message-ID: <20040105164902.GA3483@suse.de> (raw)
In-Reply-To: <200401051747.45039.bzolnier@elka.pw.edu.pl>
On Mon, Jan 05 2004, Bartlomiej Zolnierkiewicz wrote:
> > calling end_request with a null sector count, ide_end_request will then
> > take hard_nr_sectors which will end the whole request even if only one
> > bio was finished, huh? Am I missing something here?
>
> No, it is used mainly to fail requests.
>
> This hack should be later removed with care
> (there is some strange comment about locking).
IIRC, it's due to it not always being safe to inspect rq state outside
of ide_lock. So that makes 0 a magic value that just means 'end the
first chunk' for ide_end_request().
--
Jens Axboe
next prev parent reply other threads:[~2004-01-05 16:49 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1072977507.4170.14.camel@leto.cs.pocnet.net>
2004-01-01 11:27 ` Possibly wrong BIO usage in ide_multwrite Bartlomiej Zolnierkiewicz
2004-01-02 3:20 ` Christophe Saout
2004-01-02 4:43 ` CPRM ?? " Andre Hedrick
2004-01-02 11:30 ` Jens Axboe
2004-01-03 7:53 ` Andre Hedrick
2004-01-03 10:57 ` Jens Axboe
2004-01-03 19:55 ` Andre Hedrick
2004-01-04 10:42 ` Jens Axboe
2004-01-04 22:02 ` Andre Hedrick
2004-01-05 10:17 ` Jens Axboe
2004-01-02 12:45 ` Christophe Saout
2004-01-03 7:51 ` Andre Hedrick
2004-01-03 22:02 ` Bartlomiej Zolnierkiewicz
2004-01-04 17:30 ` Christophe Saout
2004-01-05 16:12 ` Bartlomiej Zolnierkiewicz
2004-01-05 16:48 ` Christophe Saout
2004-01-05 3:52 ` Christophe Saout
2004-01-05 17:08 ` Bartlomiej Zolnierkiewicz
2004-01-05 22:51 ` Christophe Saout
2004-01-05 23:59 ` Bartlomiej Zolnierkiewicz
2004-01-06 11:33 ` Christophe Saout
2004-01-06 14:38 ` Bartlomiej Zolnierkiewicz
2004-01-06 15:21 ` Christophe Saout
2004-01-05 4:03 ` Christophe Saout
2004-01-05 16:47 ` Bartlomiej Zolnierkiewicz
2004-01-05 16:49 ` Jens Axboe [this message]
2004-01-05 17:13 ` Bartlomiej Zolnierkiewicz
2004-01-05 18:16 ` Jens Axboe
2004-01-05 18:27 ` Bartlomiej Zolnierkiewicz
2004-01-01 23:02 ` Andre Hedrick
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