From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jens Axboe <axboe@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Block layer question - indicating EOF on block devices
Date: Thu, 02 Dec 2004 13:01:43 +0000 [thread overview]
Message-ID: <1101992502.5624.8.camel@localhost.localdomain> (raw)
In-Reply-To: <20041202081828.GC10454@suse.de>
On Iau, 2004-12-02 at 08:18, Jens Axboe wrote:
> The upper buffer layer could do something intelligent if EOF is set on
> the bio, it really should. The problem is that there's no -EXXX to flag
> EOF from the driver, it would be nicest if one could just do:
>
> end_that_request_chunk(req, 1, good_bytes);
> end_that_request_chunk(req, -EOF, residual);
>
We have a set of internal error codes around -512 for things like
"please use
the default ioctl behaviour". The error codes don't seem to get
propogated up through the page cache however when I tried using this (I
just "borrowed"
-ENOMEDIUM for testing) with the idea of catching it at the top.
next prev parent reply other threads:[~2004-12-02 14:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-30 15:50 Block layer question - indicating EOF on block devices Alan Cox
2004-12-01 2:43 ` Andrew Morton
2004-12-01 14:54 ` Alan Cox
2004-12-02 8:18 ` Jens Axboe
2004-12-02 13:01 ` Alan Cox [this message]
2004-12-02 14:07 ` Jens Axboe
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