From: Jens Axboe <jens.axboe@oracle.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: James.Bottomley@HansenPartnership.com, linux-scsi@vger.kernel.org
Subject: Re: [PATCH] [14/20] Don't disable direct_io for unchecked_isa_dma in st.c
Date: Fri, 14 Mar 2008 14:51:35 +0100 [thread overview]
Message-ID: <20080314135135.GT17940@kernel.dk> (raw)
In-Reply-To: <20080307175414.08C981B41AE@basil.firstfloor.org>
On Fri, Mar 07 2008, Andi Kleen wrote:
>
> Block layer bounces anyways.
Are you sure? Seems to me that st builds its own list with
get_user_pages() for direct io, where will that get bounced? The block
layer will only bounce things that are mapped directly, so if st used
blk_rq_map_kern() and inserted that request in the queue, we could
proceed with killing that check in st.
--
Jens Axboe
next prev parent reply other threads:[~2008-03-14 13:51 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-07 17:53 [PATCH] [0/20] Remove isa_unchecked_dma and some more GFP_DMAs in the mid layer v3 Andi Kleen
2008-03-07 17:54 ` [PATCH] [1/20] Add sense_buffer_isa to host template Andi Kleen
2008-03-07 17:54 ` [PATCH] [2/20] Remove unchecked_isa in BusLogic Andi Kleen
2008-03-07 17:54 ` [PATCH] [3/20] Remove unchecked_isa_dma in advansys.c Andi Kleen
2008-03-07 17:54 ` [PATCH] [4/20] Remove unchecked_isa_dma in gdth Andi Kleen
2008-03-07 17:54 ` [PATCH] [5/20] Remove unchecked_isa_dma in eata.c Andi Kleen
2008-03-07 17:54 ` [PATCH] [6/20] Remove unchecked_isa_dma in aha1542 Andi Kleen
2008-03-07 17:54 ` [PATCH] [7/20] Remove unchecked_isa_dma in aha152x/wd7000/sym53c416/u14-34f/NCR53c406a Andi Kleen
2008-03-07 17:54 ` [PATCH] [8/20] Remove random noop unchecked_isa_dma users Andi Kleen
2008-03-07 17:54 ` [PATCH] [9/20] Add blk_kmalloc/blk_alloc_pages Andi Kleen
2008-03-13 22:06 ` James Bottomley
2008-03-14 13:48 ` Jens Axboe
2008-03-14 13:59 ` Andi Kleen
2008-03-17 8:27 ` Jens Axboe
2008-03-17 8:36 ` Andi Kleen
2008-03-17 8:38 ` Jens Axboe
2008-03-17 8:53 ` Andi Kleen
2008-03-17 9:18 ` Boaz Harrosh
2008-03-17 10:03 ` Andi Kleen
2008-03-17 20:29 ` Jens Axboe
2008-03-17 20:45 ` Andi Kleen
2008-03-17 20:46 ` Jens Axboe
2008-03-17 21:34 ` Andi Kleen
2008-03-18 7:26 ` Jens Axboe
2008-04-02 3:37 ` FUJITA Tomonori
2008-04-02 8:43 ` Boaz Harrosh
2008-04-02 11:08 ` FUJITA Tomonori
2008-04-02 11:32 ` Boaz Harrosh
2008-03-17 13:59 ` James Bottomley
2008-03-07 17:54 ` [PATCH] [11/20] Remove unchecked_isa_dma support for hostdata Andi Kleen
2008-03-07 17:54 ` [PATCH] [12/20] Remove unchecked_isa_dma checks in sg.c Andi Kleen
2008-03-07 17:54 ` [PATCH] [13/20] Use blk_kmalloc in scsi_scan Andi Kleen
2008-03-07 17:54 ` [PATCH] [14/20] Don't disable direct_io for unchecked_isa_dma in st.c Andi Kleen
2008-03-14 13:51 ` Jens Axboe [this message]
2008-03-14 14:24 ` Christoph Hellwig
2008-03-16 12:39 ` Boaz Harrosh
2008-03-16 12:44 ` Andi Kleen
2008-03-17 8:28 ` Jens Axboe
2008-03-27 17:26 ` Mike Christie
2008-03-17 8:27 ` Jens Axboe
2008-03-17 10:55 ` FUJITA Tomonori
2008-03-17 12:21 ` Boaz Harrosh
2008-03-07 17:54 ` [PATCH] [15/20] Remove automatic block layer bouncing for unchecked_isa_dma Andi Kleen
2008-03-07 17:54 ` [PATCH] [16/20] Convert sr driver over the blk_kmalloc Andi Kleen
2008-03-07 17:54 ` [PATCH] [17/20] Remove unchecked_isa_dma from sysfs Andi Kleen
2008-03-07 17:54 ` [PATCH] [18/20] Switch to a single SCSI command pool Andi Kleen
2008-03-07 17:54 ` [PATCH] [19/20] Finally kill unchecked_isa_dma Andi Kleen
2008-03-07 17:54 ` [PATCH] [20/20] Convert DMA buffers in ch.c to allocate via the block layer Andi Kleen
2008-03-11 17:55 ` [PATCH] [0/20] Remove isa_unchecked_dma and some more GFP_DMAs in the mid layer v3 Boaz Harrosh
2008-03-12 0:56 ` Andi Kleen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080314135135.GT17940@kernel.dk \
--to=jens.axboe@oracle.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=andi@firstfloor.org \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).