From: Ted Ts'o <tytso@mit.edu>
Subject: Re: [PATCH -v2 0/6] ext4: use the bio layer directly
Date: Sat, 23 Oct 2010 19:03:39 -0400
Message-ID: <20101023230338.GD24650@thunk.org>
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On Sat, Oct 23, 2010 at 04:40:14PM -0400, Theodore Ts'o wrote:
> This set of patches passes xfstests for both 1k and 4k block sizes.  For
> streaming I/O writes, it reduces the number of block I/O queue
> submissions by a factor of 1024 in the ideal case.  (i.e., instead of
> submitting 4k requests at a time, we can now submit up to 512k writes at
> a time, a 128 factor of improvement.)

Sigh, this paragraph isn't quite right.  Let me reword:

This set of patches passes xfstests for both 1k and 4k block sizes.  For
streaming I/O writes, it reduces the number of block I/O queue
submissions by a factor of 128 in the ideal case.  (i.e., instead of
submitting 4k requests at a time, we can now submit up to 512k writes at
a time.)

						- Ted