From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Andrew Morton <akpm@zip.com.au>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch 6/12] hold atomic kmaps across generic_file_read
Date: Sat, 10 Aug 2002 18:55:08 +0100 [thread overview]
Message-ID: <20020810185508.A423@kushida.apsleyroad.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0208101041500.2197-100000@home.transmeta.com>; from torvalds@transmeta.com on Sat, Aug 10, 2002 at 10:46:30AM -0700
Linus Torvalds wrote:
> For people like that, wouldn't it be nice to just be able to tell them: if
> you do X, we guarantee that you'll get optimal zero-copy performance for
> reading a file.
Don't forget to include the need for mmap(... MAP_ANON ...) prior to the
read.
Given the user will need to establish a new mapping anyway, why pussy
foot around with subtleties? Just add a MAP_PREFAULT flag to mmap(),
which reads the whole file and maps it before returning.
-- Jamie
next prev parent reply other threads:[~2002-08-10 17:52 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-10 0:57 [patch 6/12] hold atomic kmaps across generic_file_read Andrew Morton
2002-08-10 1:33 ` Linus Torvalds
2002-08-10 3:53 ` Andrew Morton
2002-08-10 3:53 ` Linus Torvalds
2002-08-10 6:12 ` Andrew Morton
2002-08-10 7:25 ` Linus Torvalds
2002-08-10 9:08 ` Andrew Morton
2002-08-10 12:44 ` Daniel Phillips
2002-08-10 17:01 ` Linus Torvalds
2002-08-10 18:16 ` Daniel Phillips
2002-08-10 18:32 ` Linus Torvalds
2002-08-10 18:46 ` Daniel Phillips
2002-08-10 14:16 ` Rik van Riel
2002-08-10 17:03 ` Linus Torvalds
2002-08-10 17:36 ` Jamie Lokier
2002-08-10 17:46 ` Linus Torvalds
2002-08-10 17:55 ` Jamie Lokier [this message]
2002-08-10 18:42 ` Linus Torvalds
2002-08-10 18:52 ` Jeff Garzik
2002-08-10 19:01 ` Christoph Hellwig
2002-08-10 19:04 ` Jeff Garzik
2002-08-12 15:20 ` Ingo Oeser
2002-08-12 0:18 ` Albert D. Cahalan
2002-08-12 14:11 ` Jeff Garzik
2002-08-12 14:46 ` David Woodhouse
2002-08-10 19:10 ` Jamie Lokier
2002-08-10 22:42 ` Linus Torvalds
2002-08-11 3:17 ` Simon Kirby
2002-08-11 6:07 ` Andrew Morton
2002-08-11 8:46 ` Simon Kirby
2002-08-11 9:36 ` Andrew Morton
2002-08-11 9:49 ` Andrew Morton
2002-08-11 10:28 ` Andrew Morton
2002-08-11 18:52 ` Linus Torvalds
2002-08-12 3:28 ` Andrew Morton
2002-08-12 3:27 ` Linus Torvalds
2002-08-12 4:08 ` Andrew Morton
2002-08-12 6:20 ` Simon Kirby
2002-08-12 6:44 ` Andrew Morton
2002-08-12 19:43 ` Trond Myklebust
2002-08-12 20:43 ` Andrew Morton
2002-08-11 8:00 ` Daniel Phillips
2002-08-11 19:00 ` Linus Torvalds
2002-08-11 19:43 ` Daniel Phillips
2002-08-11 0:34 ` Andrew Morton
2002-08-11 0:56 ` Linus Torvalds
2002-08-11 1:27 ` Andrew Morton
2002-08-12 7:45 ` Rusty Russell
2002-08-12 9:45 ` Daniel Phillips
2002-08-12 20:29 ` Linus Torvalds
2002-08-12 21:21 ` Daniel Phillips
2002-08-12 17:30 ` Linus Torvalds
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