From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Jens Axboe <axboe@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, torvalds@osdl.org
Subject: Re: [PATCH][RFC] splice support
Date: Thu, 30 Mar 2006 18:25:58 +1000 [thread overview]
Message-ID: <442B9616.3050400@yahoo.com.au> (raw)
In-Reply-To: <20060330081008.GO13476@suse.de>
Jens Axboe wrote:
> On Thu, Mar 30 2006, Andrew Morton wrote:
>>Maybe the code handles that by making sure that all the pages in the range
>>are already in pagecache - I didn't check. But that would take some heroic
>>locking.
>
>
> It doesn't, I'm assuming that find_get_pages() returns consequtive pages
> atm. Would seem like the sane interface :-)
>
It doesn't.
You could do a find_get_pages_and_holes (or something along those
lines), which would fetch contiguous pagecache and stick NULLs
if pages don't exist.
Would require a bit of radix-tree support to do it nicely, but you
could get started with a naive find_get_page loop.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-03-30 18:58 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-29 12:28 [PATCH][RFC] splice support Jens Axboe
2006-03-29 12:30 ` Jens Axboe
2006-03-29 13:15 ` Jeff Garzik
2006-03-29 13:27 ` Jens Axboe
2006-03-29 21:49 ` Nathan Scott
2006-03-29 20:06 ` Linus Torvalds
2006-03-29 20:42 ` Jens Axboe
2006-03-29 20:43 ` Jens Axboe
2006-03-29 21:14 ` Linus Torvalds
2006-03-30 6:17 ` Jens Axboe
2006-03-29 22:37 ` Andrew Morton
2006-03-30 0:50 ` Linus Torvalds
2006-03-30 1:04 ` Jeff Garzik
2006-03-30 1:20 ` Andrew Morton
2006-03-30 6:18 ` Jens Axboe
2006-03-30 2:08 ` Andrew Morton
2006-03-30 3:44 ` Nick Piggin
2006-03-30 7:21 ` Jens Axboe
2006-03-30 7:30 ` Andrew Morton
2006-03-30 7:33 ` Jens Axboe
2006-03-30 8:02 ` Jan Engelhardt
2006-03-30 3:10 ` Nick Piggin
2006-03-30 7:16 ` Jens Axboe
2006-03-30 8:09 ` Jan Engelhardt
2006-03-30 7:45 ` Jens Axboe
2006-03-30 8:02 ` Andrew Morton
2006-03-30 8:10 ` Jens Axboe
2006-03-30 8:25 ` Nick Piggin [this message]
2006-03-30 8:27 ` Andrew Morton
2006-03-30 8:50 ` Nick Piggin
2006-03-30 8:51 ` Jens Axboe
2006-03-30 9:15 ` Jens Axboe
2006-03-30 9:40 ` Andrew Morton
2006-03-30 9:45 ` Jens Axboe
2006-03-30 9:56 ` Andrew Morton
2006-03-30 10:01 ` Jens Axboe
2006-03-30 2:36 ` Nick Piggin
2006-03-30 7:00 ` Jens Axboe
2006-03-30 7:33 ` Nick Piggin
2006-03-30 8:54 ` KAMEZAWA Hiroyuki
2006-03-30 13:53 ` Jens Axboe
2006-03-30 14:05 ` KAMEZAWA Hiroyuki
2006-03-30 14:38 ` Jens Axboe
2006-03-30 14:55 ` KAMEZAWA Hiroyuki
-- strict thread matches above, loose matches on Subject: below --
2005-12-19 9:16 Jens Axboe
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