Date: Tue, 31 Oct 2006 22:41:46 +0100
From: =?iso-8859-1?Q?J=F6rn?= Engel <joern@wohnheim.fh-wedel.de>
To: Pierre Ossman <drzeus-list@drzeus.cx>, Arnd Bergmann <arnd@arndb.de>,
       Christoph Hellwig <hch@lst.de>, Jiri Slaby <jirislaby@gmail.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Adrian Bunk <bunk@stusta.de>, Dominik Brodowski <linux@brodo.de>,
       Harald Welte <laforge@netfilter.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Jean Delvare <khali@linux-fr.org>
Subject: Re: feature-removal-schedule obsoletes
Message-ID: <20061031214146.GB30739@wohnheim.fh-wedel.de>
References: <45324658.1000203@gmail.com> <20061016133352.GA23391@lst.de> <200610242124.49911.arnd@arndb.de> <4543162B.7030701@drzeus.cx> <20061031155756.GA23021@wohnheim.fh-wedel.de> <20061031193212.GC26625@flint.arm.linux.org.uk>
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On Tue, 31 October 2006 19:32:12 +0000, Russell King wrote:
> On Tue, Oct 31, 2006 at 04:57:56PM +0100, J?rn Engel wrote:
> > 
> > Why does the MMC block driver use a thread?  Is there a technical
> > reason for this or could it be done in original process context as
> > well, removing some code and useless cpu scheduler overhead?
> 
> As I understand it, there is no guarantee that a block drivers request
> function will be called in process context - it could be called in
> interrupt context.

Makes some sense.  I would still like to understand when a request
function is called from interrupt context, but if it is, the thread is
certainly necessary.

J?rn

-- 
This above all: to thine own self be true.
-- Shakespeare
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