From: Pavel Machek <pavel@ucw.cz>
To: Nigel Cunningham <ncunningham@linuxmail.org>
Cc: Andrew Morton <akpm@osdl.org>, "Rafael J. Wysocki" <rjw@sisk.pl>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Use extents for recording what swap is allocated.
Date: Mon, 23 Oct 2006 17:32:57 +0200 [thread overview]
Message-ID: <20061023153257.GC8414@elf.ucw.cz> (raw)
In-Reply-To: <1161576857.3466.9.camel@nigel.suspend2.net>
Hi!
> Switch from bitmaps to using extents to record what swap is allocated;
> they make more efficient use of memory, particularly where the allocated
> storage is small and the swap space is large.
> This is also part of the ground work for implementing support for
> supporting multiple swap devices.
bitmaps were more efficient and longer than original code... I did not
_like_ them, but they are in now. I'd hate to change the code again,
for what, 0.5% gain?
...and this is still longer than bitmaps.
And SNAPSHOT_GET_SWAP_PAGE seems to support multiple swap spaces
already.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2006-10-23 15:34 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-23 4:14 [PATCH] Use extents for recording what swap is allocated Nigel Cunningham
2006-10-23 15:32 ` Pavel Machek [this message]
2006-10-23 23:04 ` Nigel Cunningham
2006-10-24 8:43 ` Rafael J. Wysocki
2006-10-24 20:08 ` Rafael J. Wysocki
2006-10-24 21:34 ` Pavel Machek
2006-10-24 21:58 ` Rafael J. Wysocki
2006-10-24 22:15 ` Nigel Cunningham
2006-10-24 22:19 ` Pavel Machek
2006-10-24 22:30 ` Nigel Cunningham
2006-10-25 8:11 ` Pavel Machek
2006-10-25 8:28 ` Nigel Cunningham
2006-10-25 8:42 ` Pavel Machek
2006-10-25 9:01 ` Nigel Cunningham
2006-10-25 9:10 ` Pavel Machek
2006-10-25 10:05 ` Nigel Cunningham
2006-10-25 12:46 ` Rafael J. Wysocki
2006-10-27 11:37 ` Pavel Machek
2006-10-24 22:13 ` Nigel Cunningham
2006-10-24 22:45 ` Rafael J. Wysocki
2006-10-24 23:05 ` Nigel Cunningham
2006-10-31 11:39 ` Nigel Cunningham
2006-10-24 20:42 ` Christoph Hellwig
2006-10-24 20:58 ` Rafael J. Wysocki
2006-10-24 22:06 ` Nigel Cunningham
2006-10-24 22:47 ` Christoph Hellwig
2006-10-24 23:03 ` Nigel Cunningham
2006-10-25 9:17 ` Jens Axboe
2006-10-25 10:07 ` Nigel Cunningham
2006-10-25 10:20 ` Jens Axboe
2006-10-31 11:38 ` Nigel Cunningham
2006-11-01 12:36 ` Pavel Machek
2006-11-01 21:19 ` Nigel Cunningham
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