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Message-ID: <3D5563A5.2050007@mandrakesoft.com>
Date: Sat, 10 Aug 2002 15:04:05 -0400
From: Jeff Garzik <jgarzik@mandrakesoft.com>
Organization: MandrakeSoft
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To: Christoph Hellwig <hch@infradead.org>
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
References: <Pine.LNX.4.44.0208101134510.2197-100000@home.transmeta.com> <3D556101.8080006@mandrakesoft.com> <20020810200116.A15236@infradead.org>
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Christoph Hellwig wrote:
> 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..



Really?  Bummer :)  That was a useful hack for some cases...

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