linux-kernel - [RFC PATCH 0/8] current relay cleanup patchset

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Date:	Thu, 25 Sep 2008 01:07:05 -0500
From:	Tom Zanussi <zanussi@...cast.net>
To:	Martin Bligh <mbligh@...gle.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, prasad@...ux.vnet.ibm.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Steven Rostedt <rostedt@...dmis.org>, od@...e.com,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>, hch@....de,
	David Wilder <dwilder@...ibm.com>
Subject: [RFC PATCH 0/8] current relay cleanup patchset

Here's the current relay cleanup patchset.  The first two patches make
the write path completely replaceable, the third adds flags along with
some related cleanup, and the next 5 remove the padding in several
stages. 

It's a work in progress, but because I wanted the intermediate stages to
actually work and not break anything, some of these patches, especially
05, are just temporary and will be removed in the next iteration.

I didn't have time to clean up the first 3 either - I'll also do that
the next time around.

Anyway, removing the padding has simplified the read/splice code
significantly; it's always been a source of headaches so I'm glad it's
gone, and it doesn't seem to have broken anything - a quick test using
blktrace in both read() and splice() modes didn't show any problems.

In the next round I plan to do vmap and sub-buffer removal.

Tom

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