linux-kernel - Re: Announce: Semaphore-Removal tree

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Message-ID: <20080425211250.GA13858@infradead.org>
Date:	Fri, 25 Apr 2008 17:12:50 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Matthew Wilcox <matthew@....cx>, linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: Announce: Semaphore-Removal tree

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.

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