From: Christoph Lameter <clameter@sgi.com>
To: Jens Axboe <jens.axboe@oracle.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 08:22:45 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0708310821140.16456@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070831081201.GO29452@kernel.dk>
On Fri, 31 Aug 2007, Jens Axboe wrote:
> > Ok. So another solution maybe to limit the blocksizes that can be used
> > with a device?
>
> That'd work for creation, but not for moving things around.
What do you mean by moving things around? Creation binds a filesystem to a
device.
> > Hmmmm.. We could keep the existing scheme too and check that device
> > drivers split things up if they are too large? Isnt it possible today
> > to create a huge bio of 2M for huge pages and send it to a device?
>
> Not sure, aren't the constituents of compound pages the basis for IO?
get_user_pages() serializes compound pages into the base pages. But doesnt
the I/O layer coalesce these later into 2M chunks again?
next prev parent reply other threads:[~2007-08-31 15:22 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
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 [this message]
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
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