From: Jens Axboe <axboe@suse.de>
To: Stephen Lord <lord@sgi.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Marcin Dalecki <dalecki@evision.ag>
Subject: Re: A new ide warning message
Date: Fri, 2 Aug 2002 13:47:14 +0200 [thread overview]
Message-ID: <20020802114713.GD1055@suse.de> (raw)
In-Reply-To: <1028288066.1123.5.camel@laptop.americas.sgi.com>
On Fri, Aug 02 2002, Stephen Lord wrote:
>
> In 2.5.30 I started getting these warning messages out ide during
> the mount of an XFS filesystem:
>
> ide-dma: received 1 phys segments, build 2
>
> Can anyone translate that into English please.
Well I added that message when switching to the 2.5 style request
mapping functions, and I think the message is perfectly clear :-). Never
the less, it means that a segment that came into the ide layer with an
advertised size of 1 segment was returned from blk_rq_map_sg() as having
_two_. This can be a problem with dynamically allocated sg table (not
that ide uses those, but still).
It's a bug and usually a critical one when this happens. I'd be inclined
to think that Adam's changes in this path are to blame for this error.
Oh, and I'd be _really_ careful if you have trusted data on that drive
(surely not when running 2.5 ide on it :-)
--
Jens Axboe
next prev parent reply other threads:[~2002-08-02 11:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-02 11:34 A new ide warning message Stephen Lord
2002-08-02 11:38 ` Marcin Dalecki
2002-08-02 11:53 ` Jens Axboe
2002-08-02 11:59 ` Jens Axboe
2002-08-02 13:47 ` Bartlomiej Zolnierkiewicz
2002-08-02 14:20 ` Jens Axboe
2002-08-02 16:01 ` Bartlomiej Zolnierkiewicz
2002-08-02 16:11 ` Jens Axboe
2002-08-03 18:41 ` Marcin Dalecki
2002-08-02 11:47 ` Jens Axboe [this message]
2002-08-02 11:48 ` Marcin Dalecki
2002-08-02 11:55 ` Jens Axboe
2002-08-02 12:05 ` Stephen Lord
2002-08-02 12:12 ` Marcin Dalecki
2002-08-02 12:30 ` Jens Axboe
2002-08-02 12:31 ` Marcin Dalecki
2002-08-02 12:41 ` Jens Axboe
2002-08-02 13:50 ` Steve Lord
2002-08-02 18:34 ` Bartlomiej Zolnierkiewicz
-- strict thread matches above, loose matches on Subject: below --
2002-08-03 3:28 Adam J. Richter
2002-08-03 3:32 Adam J. Richter
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