From: Jens Axboe <axboe@suse.de>
To: martin@dalecki.de
Cc: Stephen Lord <lord@sgi.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: A new ide warning message
Date: Fri, 2 Aug 2002 13:53:21 +0200 [thread overview]
Message-ID: <20020802115321.GE1055@suse.de> (raw)
In-Reply-To: <3D4A6F43.4010908@evision.ag>
On Fri, Aug 02 2002, Marcin Dalecki wrote:
> U?ytkownik Stephen Lord napisa?:
> >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.
>
> It can be found in pcidma.c.
> It is repoting that we have one physical segment needed by
> the request in question but the sctter gather list allocation
> needed to break it up for mapping in two.
You don't seem to realise that this is a BUG (somewhere, could even be
in the generic mapping functions)! blk_rq_map_sg() must never map a
request to more entries that rq->nr_segments, that's just very wrong.
That's why I'm suspecting the recent pcidma changes. Just a feeling, I
have not looked at them.
--
Jens Axboe
next prev parent reply other threads:[~2002-08-02 11:49 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 [this message]
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
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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