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Date: Sat, 10 Aug 2002 20:01:17 +0100
From: Christoph Hellwig <hch@infradead.org>
To: Jeff Garzik <jgarzik@mandrakesoft.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
       Jamie Lokier <lk@tantalophile.demon.co.uk>,
       Andrew Morton <akpm@zip.com.au>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch 6/12] hold atomic kmaps across generic_file_read
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	Jeff Garzik <jgarzik@mandrakesoft.com>,
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In-Reply-To: <3D556101.8080006@mandrakesoft.com>; from jgarzik@mandrakesoft.com on Sat, Aug 10, 2002 at 02:52:49PM -0400
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On Sat, Aug 10, 2002 at 02:52:49PM -0400, Jeff Garzik wrote:
> While working on a race-free rewrite of cp/mv/rm (suggested by Al), I 
> did overall-time benchmarks on read+write versus sendfile/stat versus 
> mmap/stat, and found that pretty much the fastest way under Linux 2.2, 
> 2.4, and solaris was read+write of PAGE_SIZE, or PAGE_SIZE*2 chunks. 
> [obviously, 2.2 and solaris didn't do sendfile test]

Solaris 9 (and Solaris 8 with a certain patch) support Linux-style
sendfile().  Linux 2.5 on the other hand doesn't support sendfile to
files anymore..

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