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Date: Fri, 25 Apr 2008 17:12:50 -0400
From: Christoph Hellwig <hch@infradead.org>
To: Daniel Walker <dwalker@mvista.com>
Cc: Matthew Wilcox <matthew@wil.cx>, linux-kernel@vger.kernel.org,
       Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: Announce: Semaphore-Removal tree
Message-ID: <20080425211250.GA13858@infradead.org>
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On Fri, Apr 25, 2008 at 01:38:37PM -0700, Daniel Walker wrote:
> I was reviewing your patches, and I don't like the semaphore to spinlock
> changes.. There's no reason to start adding spinlocks, unless it's
> really performance sensitive which none of those places are.. 

Yes, there is.  The spinlock is our most efficient locking primitive
for the normal mostly un-contentded case.  Please get out of your
realtime-ghetto.