From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Pierre Ossman <drzeus-list@drzeus.cx>, Jens Axboe <axboe@suse.de>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: How to map high memory for block io
Date: Fri, 27 Jan 2006 21:04:33 +0100 [thread overview]
Message-ID: <43DA7CD1.4040301@drzeus.cx> (raw)
In-Reply-To: <20060127194318.GA1433@flint.arm.linux.org.uk>
Russell King wrote:
>
> I don't see what the problem is. A sg entry is a list of struct page
> pointers, an offset, and a size. As such, it can't describe a transfer
> which crosses a page because such a structure does not imply that one
> struct page follows another struct page.
>
>
If the pages do not strictly follow each other then there is a lot of
broken code in the kernel. drivers/mmc/mmci.c and drivers/block/ub.c
being two occurences since both assume they can access the entire entry
through a single mapping.
Rgds
Pierre
next prev parent reply other threads:[~2006-01-27 20:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-27 6:45 How to map high memory for block io Pierre Ossman
2006-01-27 10:26 ` Jens Axboe
2006-01-27 10:33 ` Pierre Ossman
2006-01-27 10:43 ` Jens Axboe
2006-01-27 12:14 ` Pierre Ossman
2006-01-27 12:39 ` Jens Axboe
2006-01-27 13:16 ` Pierre Ossman
2006-01-27 13:48 ` Pierre Ossman
2006-01-27 14:00 ` Jens Axboe
2006-01-27 14:14 ` Pierre Ossman
2006-01-27 18:37 ` Pierre Ossman
2006-01-27 19:43 ` Russell King
2006-01-27 20:04 ` Pierre Ossman [this message]
2006-01-27 20:10 ` Jens Axboe
2006-01-27 20:14 ` Russell King
2006-01-27 20:22 ` Jens Axboe
2006-01-27 20:26 ` Russell King
2006-01-27 20:38 ` Pierre Ossman
2006-01-27 21:58 ` Pierre Ossman
2006-01-27 22:54 ` Russell King
2006-01-28 19:17 ` Jens Axboe
2006-01-28 19:32 ` Pierre Ossman
2006-01-29 15:22 ` Jens Axboe
2006-01-30 7:57 ` Pierre Ossman
2006-01-30 8:09 ` Jens Axboe
2006-01-31 18:39 ` Pierre Ossman
2006-03-01 23:29 ` Russell King
2006-03-02 7:21 ` Jens Axboe
2006-03-02 7:26 ` Pierre Ossman
2006-03-02 9:41 ` Russell King
2006-03-02 9:52 ` Pierre Ossman
2006-03-02 10:04 ` Russell King
2006-03-02 10:26 ` Pierre Ossman
2006-03-02 11:45 ` Russell King
2007-01-30 20:41 ` Pierre Ossman
2006-01-27 20:28 ` Pierre Ossman
2006-01-27 20:12 ` Pierre Ossman
2006-01-27 20:16 ` Russell King
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