linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

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Message-ID: <20100528105333.40a1efbe@lxorguk.ukuu.org.uk>
Date:	Fri, 28 May 2010 10:53:33 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	tytso@....edu
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Florian Mickler <florian@...kler.org>, felipe.balbi@...ia.com,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

Ted

As a PS to the previous email the situation has I think more choices than
you portray.

Given the need for various constraints imposed by drivers for things like
RT it's entirely possible that a solution ends up being something like


Kernel proper:
Turn suspend block kernel API into an expression of constraints (or
				whatever else seems to work)
Throw the user space in the bin

Google:
Use the constraints in a sledgehammer manner (hey it solves your problem
			in that form so why not)
Patch in a private user space API


That makes things much much easier as we don't risk getting a horribly
broken API into the kernel that is hard to remove, while hopefully
meaning its rather easier for google to merge drivers and other code as
well as to maintain a smaller patch set.

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