From: Jens Axboe <jens.axboe@oracle.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Dmitry Monakhov <dmonakhov@sw.ru>,
torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Mel Gorman <mel@skynet.ie>,
William Lee Irwin III <wli@holomorphy.com>,
David Chinner <dgc@sgi.com>, Badari Pulavarty <pbadari@gmail.com>,
Maxim Levitsky <maximlevitsky@gmail.com>,
Fengguang Wu <fengguang.wu@gmail.com>,
swin wang <wangswin@gmail.com>,
totty.lu@gmail.com, "H. Peter Anvin" <hpa@zytor.com>,
joern@lazybastard.org,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [11/36] Use page_cache_xxx in fs/buffer.c
Date: Fri, 31 Aug 2007 09:11:43 +0200 [thread overview]
Message-ID: <20070831071142.GI29452@kernel.dk> (raw)
In-Reply-To: <Pine.LNX.4.64.0708310003280.14375@schroedinger.engr.sgi.com>
On Fri, Aug 31 2007, Christoph Lameter wrote:
> On Fri, 31 Aug 2007, Jens Axboe wrote:
>
> > > So if we try to push a too large buffer down with submit_bh() we get a
> > > failure.
> >
> > Only partly, you may be violating a number of other restrictions (size
> > is many things, not just length of the data).
>
> Could you be more specific?
Size of a single segment, for instance. Or if the bio crosses a dma
boundary. If your block is 64kb and the maximum segment size is 32kb,
then you would need to clone the bio and split it into two.
Things like that. This isn't a problem with single page requests, as we
based the lower possible boundaries on that.
--
Jens Axboe
next prev parent reply other threads:[~2007-08-31 7:11 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070828190551.415127746@sgi.com>
[not found] ` <20070828190735.292638294@sgi.com>
2007-08-30 0:11 ` [31/36] Large Blocksize: Core piece Mingming Cao
2007-08-30 0:12 ` Christoph Lameter
2007-08-30 0:47 ` [RFC 1/4] Large Blocksize support for Ext2/3/4 Mingming Cao
2007-08-30 0:59 ` Christoph Lameter
2007-09-01 0:01 ` Mingming Cao
2007-09-01 0:12 ` [RFC 1/2] JBD: slab management support for large block(>8k) Mingming Cao
2007-09-01 18:39 ` Christoph Hellwig
2007-09-02 11:40 ` Christoph Lameter
2007-09-02 15:28 ` Christoph Hellwig
2007-09-03 7:55 ` Christoph Lameter
2007-09-03 13:40 ` Christoph Hellwig
2007-09-03 19:31 ` Christoph Lameter
2007-09-03 19:33 ` Christoph Hellwig
2007-09-14 18:53 ` [PATCH] JBD slab cleanups Mingming Cao
2007-09-14 18:58 ` Christoph Lameter
2007-09-17 19:29 ` Mingming Cao
2007-09-17 19:34 ` Christoph Hellwig
2007-09-17 22:01 ` Badari Pulavarty
2007-09-17 22:57 ` Mingming Cao
2007-09-18 9:04 ` Christoph Hellwig
2007-09-18 16:35 ` Mingming Cao
2007-09-18 18:04 ` Dave Kleikamp
2007-09-19 1:00 ` Mingming Cao
2007-09-19 2:19 ` Andrew Morton
2007-09-19 19:15 ` Mingming Cao
2007-09-19 19:22 ` [PATCH] JBD: use GFP_NOFS in kmalloc Mingming Cao
2007-09-19 21:34 ` Andrew Morton
2007-09-19 21:55 ` Mingming Cao
2007-09-20 4:25 ` Andreas Dilger
2007-09-19 19:26 ` [PATCH] JBD slab cleanups Dave Kleikamp
2007-09-19 19:28 ` Dave Kleikamp
2007-09-19 20:47 ` Mingming Cao
2007-09-19 19:48 ` Andreas Dilger
2007-09-19 22:03 ` Mingming Cao
2007-09-01 0:12 ` [RFC 2/2] JBD: blocks reservation fix for large block support Mingming Cao
2007-08-30 0:47 ` [RFC 2/4]ext2: fix rec_len overflow with 64KB block size Mingming Cao
[not found] ` <20070828190730.220393749@sgi.com>
2007-08-30 9:20 ` [11/36] Use page_cache_xxx in fs/buffer.c Dmitry Monakhov
2007-08-30 18:14 ` Christoph Lameter
2007-08-31 1:47 ` Christoph Lameter
2007-08-31 6:56 ` Jens Axboe
2007-08-31 7:03 ` Christoph Lameter
2007-08-31 7:11 ` Jens Axboe [this message]
2007-08-31 7:17 ` Christoph Lameter
2007-08-31 7:26 ` Jens Axboe
2007-08-31 7:33 ` Christoph Lameter
2007-08-31 7:43 ` Jens Axboe
2007-08-31 7:52 ` Christoph Lameter
2007-08-31 8:12 ` Jens Axboe
2007-08-31 15:22 ` Christoph Lameter
2007-08-31 16:35 ` Jörn Engel
2007-08-31 19:00 ` Jens Axboe
2007-08-31 8:36 ` Dmitry Monakhov
2007-08-31 15:28 ` Christoph Lameter
[not found] ` <20070828192034.GA13883@lst.de>
[not found] ` <Pine.LNX.4.64.0708281254070.16473@schroedinger.engr.sgi.com>
2007-09-01 1:11 ` [00/36] Large Blocksize Support V6 Christoph Lameter
2007-09-01 19:17 ` Peter Zijlstra
2007-09-02 11:44 ` Christoph Lameter
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=20070831071142.GI29452@kernel.dk \
--to=jens.axboe@oracle.com \
--cc=clameter@sgi.com \
--cc=dgc@sgi.com \
--cc=dmonakhov@sw.ru \
--cc=ebiederm@xmission.com \
--cc=fengguang.wu@gmail.com \
--cc=hch@lst.de \
--cc=hpa@zytor.com \
--cc=joern@lazybastard.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maximlevitsky@gmail.com \
--cc=mel@skynet.ie \
--cc=pbadari@gmail.com \
--cc=torvalds@linux-foundation.org \
--cc=totty.lu@gmail.com \
--cc=wangswin@gmail.com \
--cc=wli@holomorphy.com \
/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).