From: Christoph Hellwig <hch@infradead.org>
To: Jens Axboe <axboe@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>,
James Bottomley <James.Bottomley@SteelEye.com>,
SCSI Mailing List <linux-scsi@vger.kernel.org>,
g.liakhovetski@gmx.de
Subject: Re: [PATCH] dc395x: Fix support for highmem
Date: Wed, 16 Mar 2005 17:02:59 +0000 [thread overview]
Message-ID: <20050316170259.GA25056@infradead.org> (raw)
In-Reply-To: <20050316165338.GX7842@suse.de>
On Wed, Mar 16, 2005 at 05:53:39PM +0100, Jens Axboe wrote:
> The list doesn't really need dma mapping at that point, the problem here
> is that the driver needs to punt to pio mode because of foo. So calling
> pci/dma_map_* is pointless, since the CPU will have to do the transfer
> anyways. What the driver is really looking for at this point, is a way
> to map the pages in the sglist to a virtual address.
Given that there's quite a few cases of this "problem" it would be nice
to have common helpers for it. Especially as it's really difficult when
we allow merging of sg list entries
next prev parent reply other threads:[~2005-03-16 17:03 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200503160209.j2G29cAf010870@hera.kernel.org>
2005-03-16 7:58 ` [PATCH] dc395x: Fix support for highmem Jens Axboe
2005-03-16 15:13 ` James Bottomley
2005-03-16 16:04 ` Jens Axboe
2005-03-16 16:48 ` Matthew Wilcox
2005-03-16 16:53 ` Jens Axboe
2005-03-16 17:02 ` Christoph Hellwig [this message]
2005-03-16 17:04 ` Jens Axboe
2005-03-16 18:44 ` Mike Christie
2005-03-16 18:53 ` iSCSI and scatterlists Matthew Wilcox
2005-03-16 19:59 ` Dmitry Yusupov
2005-03-16 18:53 ` [PATCH] dc395x: Fix support for highmem Jens Axboe
2005-03-20 9:14 ` Christoph Hellwig
2005-03-20 20:51 ` Guennadi Liakhovetski
2005-03-21 7:55 ` Jens Axboe
[not found] ` <7044.1111398919@www16.gmx.net>
2005-03-21 10:38 ` gl
2005-03-21 10:44 ` Jens Axboe
2005-03-21 11:00 ` gl
2005-03-30 21:22 ` Guennadi Liakhovetski
2005-03-30 22:13 ` James Bottomley
2005-03-31 8:58 ` gl
2005-04-09 22:48 ` Guennadi Liakhovetski
2005-04-21 21:49 ` Guennadi Liakhovetski
2005-04-22 11:36 ` Jens Axboe
2005-04-23 9:35 ` Guennadi Liakhovetski
2005-04-23 10:06 ` Guennadi Liakhovetski
2005-04-23 19:01 ` James Bottomley
2005-04-24 0:22 ` Guennadi Liakhovetski
2005-04-24 14:31 ` Guennadi Liakhovetski
2005-04-24 22:11 ` James Bottomley
2005-04-25 19:56 ` Guennadi Liakhovetski
2005-03-16 20:24 ` Guennadi Liakhovetski
2005-03-17 7:40 ` Jens Axboe
[not found] ` <22734.1111050528@www13.gmx.net>
2005-03-17 9:41 ` gl
2005-03-17 10:08 ` Jens Axboe
2005-03-17 10:56 ` gl
2005-03-17 20:51 ` Guennadi Liakhovetski
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