From: "Clayton Weaver" <cgweav@fastmail.fm>
To: linux-kernel@vger.kernel.org
Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window)
Date: Sat, 05 Nov 2011 10:08:23 -0700 [thread overview]
Message-ID: <1320512903.28230.140660995069181@webmail.messagingengine.com> (raw)
(NB: My only dog in this hunt is the length of this thread.)
When swapping to rotating media, all swapped pages have the same
age. Is there any performance reason to keep this property when
swapping to in-memory swap space that has rotating media or
some other longer-latency swap space for worst-case swap storage?
Is there any performance reason to extend lru logic to this type
of low-latency/high-latency swap?
Seems like an obvious question.
Will all of these potential frontswap backends want page compression?
(Should it be factored out into a common page compression
implementation that anything can use? Does this already exist? How
many pages should it operate on at one time, batched together to get
higher average compression ratios?)
--
Clayton Weaver
cgweav at fastmail dot fm
next reply other threads:[~2011-11-05 17:08 UTC|newest]
Thread overview: 175+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-05 17:08 Clayton Weaver [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-11-04 12:37 [GIT PULL] mm: frontswap (for 3.2 window) Clayton Weaver
2011-10-27 18:52 Dan Magenheimer
2011-10-27 18:52 ` Dan Magenheimer
[not found] ` <alpine.DEB.2.00.1110271318220.7639@chino.kir.corp.google.com20111027211157.GA1199@infradead.org>
2011-10-27 19:30 ` Kurt Hackel
2011-10-27 19:30 ` Kurt Hackel
2011-10-27 20:18 ` David Rientjes
2011-10-27 20:18 ` David Rientjes
2011-10-27 21:11 ` Christoph Hellwig
2011-10-27 21:11 ` Christoph Hellwig
2011-10-27 21:49 ` Dan Magenheimer
2011-10-27 21:49 ` Dan Magenheimer
2011-10-27 21:52 ` Christoph Hellwig
2011-10-27 21:52 ` Christoph Hellwig
2011-10-27 22:21 ` Dan Magenheimer
2011-10-27 22:21 ` Dan Magenheimer
2011-10-28 7:12 ` Sasha Levin
2011-10-28 7:12 ` Sasha Levin
[not found] ` <CAOzbF4fnD=CGR-nizZoBxmFSuAjFC3uAHf3wDj5RLneJvJhrOQ@mail.gmail.comCAOJsxLGOTw7rtFnqeHvzFxifA0QgPVDHZzrEo=-uB2Gkrvp=JQ@mail.gmail.com>
[not found] ` <552d2067-474d-4aef-a9a4-89e5fd8ef84f@default20111031181651.GF3466@redhat.com>
[not found] ` <60592afd-97aa-4eaf-b86b-f6695d31c7f1@default20111031223717.GI3466@redhat.com>
[not found] ` <1b2e4f74-7058-4712-85a7-84198723e3ee@default20111101012017.GJ3466@redhat.com>
[not found] ` <6a9db6d9-6f13-4855-b026-ba668c29ddfa@default20111101180702.GL3466@redhat.com>
[not found] ` <b8a0ca71-a31b-488a-9a92-2502d4a6e9bf@default20111102013122.GA18879@redhat.com>
2011-10-28 7:30 ` Cyclonus J
2011-10-28 7:30 ` Cyclonus J
2011-10-28 14:26 ` Pekka Enberg
2011-10-28 14:26 ` Pekka Enberg
2011-10-28 15:21 ` Dan Magenheimer
2011-10-28 15:21 ` Dan Magenheimer
[not found] ` <CAOJsxLEE-qf9me1SAZLFiEVhHVnDh7BDrSx1+abe9R4mfkhD=g@mail.gmail.com20111028163053.GC1319@redhat.com>
2011-10-28 15:36 ` Pekka Enberg
2011-10-28 15:36 ` Pekka Enberg
2011-10-28 16:30 ` Johannes Weiner
2011-10-28 16:30 ` Johannes Weiner
2011-10-28 17:01 ` Pekka Enberg
2011-10-28 17:01 ` Pekka Enberg
2011-10-28 17:07 ` Dan Magenheimer
2011-10-28 17:07 ` Dan Magenheimer
2011-10-28 18:28 ` John Stoffel
2011-10-28 18:28 ` John Stoffel
2011-10-28 20:19 ` Dan Magenheimer
2011-10-28 20:19 ` Dan Magenheimer
2011-10-28 20:52 ` John Stoffel
2011-10-28 20:52 ` John Stoffel
2011-10-30 19:18 ` Dan Magenheimer
2011-10-30 19:18 ` Dan Magenheimer
2011-10-30 20:06 ` Dave Hansen
2011-10-30 20:06 ` Dave Hansen
2011-10-30 21:50 ` Dan Magenheimer
2011-10-30 21:50 ` Dan Magenheimer
2011-11-02 19:45 ` Rik van Riel
2011-11-02 19:45 ` Rik van Riel
2011-11-02 20:45 ` Dan Magenheimer
2011-11-02 20:45 ` Dan Magenheimer
2011-11-06 22:32 ` Valdis.Kletnieks
2011-11-08 12:15 ` Ed Tomlinson
2011-11-08 12:15 ` Ed Tomlinson
2011-10-31 8:12 ` James Bottomley
2011-10-31 8:12 ` James Bottomley
2011-10-31 15:39 ` Dan Magenheimer
2011-10-31 15:39 ` Dan Magenheimer
2011-11-01 10:13 ` James Bottomley
2011-11-01 10:13 ` James Bottomley
2011-11-01 18:10 ` Dan Magenheimer
2011-11-01 18:10 ` Dan Magenheimer
2011-11-01 18:48 ` Dave Hansen
2011-11-01 18:48 ` Dave Hansen
2011-11-01 21:32 ` Dan Magenheimer
2011-11-01 21:32 ` Dan Magenheimer
2011-11-02 7:44 ` James Bottomley
2011-11-02 7:44 ` James Bottomley
2011-11-02 19:39 ` Dan Magenheimer
2011-11-02 19:39 ` Dan Magenheimer
2011-10-31 18:44 ` Andrea Arcangeli
2011-10-31 18:44 ` Andrea Arcangeli
2011-10-30 21:47 ` Johannes Weiner
2011-10-30 21:47 ` Johannes Weiner
2011-10-30 23:19 ` Dan Magenheimer
2011-10-30 23:19 ` Dan Magenheimer
2011-10-31 18:34 ` Andrea Arcangeli
2011-10-31 18:34 ` Andrea Arcangeli
2011-10-31 21:45 ` Dan Magenheimer
2011-10-31 21:45 ` Dan Magenheimer
2011-10-28 16:37 ` Dan Magenheimer
2011-10-28 16:37 ` Dan Magenheimer
2011-10-28 16:59 ` Pekka Enberg
2011-10-28 16:59 ` Pekka Enberg
2011-10-28 17:20 ` Dan Magenheimer
2011-10-28 17:20 ` Dan Magenheimer
2011-10-31 18:16 ` Andrea Arcangeli
2011-10-31 18:16 ` Andrea Arcangeli
2011-10-31 20:58 ` Dan Magenheimer
2011-10-31 20:58 ` Dan Magenheimer
2011-10-31 22:37 ` Andrea Arcangeli
2011-10-31 22:37 ` Andrea Arcangeli
2011-10-31 23:36 ` Dan Magenheimer
2011-10-31 23:36 ` Dan Magenheimer
2011-11-01 1:20 ` Andrea Arcangeli
2011-11-01 1:20 ` Andrea Arcangeli
2011-11-01 16:41 ` Dan Magenheimer
2011-11-01 16:41 ` Dan Magenheimer
2011-11-01 18:07 ` Andrea Arcangeli
2011-11-01 18:07 ` Andrea Arcangeli
2011-11-01 21:00 ` Dan Magenheimer
2011-11-01 21:00 ` Dan Magenheimer
2011-11-02 1:31 ` Andrea Arcangeli
2011-11-02 1:31 ` Andrea Arcangeli
2011-11-02 19:06 ` Dan Magenheimer
2011-11-02 19:06 ` Dan Magenheimer
2011-11-03 0:32 ` Andrea Arcangeli
2011-11-03 0:32 ` Andrea Arcangeli
2011-11-03 22:29 ` Dan Magenheimer
2011-11-03 22:29 ` Dan Magenheimer
2011-11-02 20:51 ` Rik van Riel
2011-11-02 20:51 ` Rik van Riel
2011-11-02 21:14 ` Dan Magenheimer
2011-11-02 21:14 ` Dan Magenheimer
2011-11-15 16:29 ` Rik van Riel
2011-11-15 16:29 ` Rik van Riel
2011-11-15 17:33 ` Jeremy Fitzhardinge
2011-11-15 17:33 ` Jeremy Fitzhardinge
2011-11-16 14:49 ` Konrad Rzeszutek Wilk
2011-11-16 14:49 ` Konrad Rzeszutek Wilk
2011-11-01 10:16 ` James Bottomley
2011-11-01 10:16 ` James Bottomley
2011-11-01 18:21 ` Dan Magenheimer
2011-11-01 18:21 ` Dan Magenheimer
2011-11-02 8:14 ` James Bottomley
2011-11-02 8:14 ` James Bottomley
2011-11-02 20:08 ` Dan Magenheimer
2011-11-02 20:08 ` Dan Magenheimer
2011-11-03 10:30 ` Theodore Tso
2011-11-03 10:30 ` Theodore Tso
2011-11-03 14:59 ` Dan Magenheimer
2011-11-03 14:59 ` Dan Magenheimer
2011-11-02 15:44 ` Avi Kivity
2011-11-02 15:44 ` Avi Kivity
2011-11-02 16:02 ` Andrea Arcangeli
2011-11-02 16:02 ` Andrea Arcangeli
2011-11-02 16:13 ` Avi Kivity
2011-11-02 16:13 ` Avi Kivity
2011-11-02 20:27 ` Dan Magenheimer
2011-11-02 20:27 ` Dan Magenheimer
2011-11-02 20:19 ` Dan Magenheimer
2011-11-02 20:19 ` Dan Magenheimer
2011-10-27 21:44 ` Avi Miller
2011-10-27 21:44 ` Avi Miller
2011-10-27 22:33 ` Brian King
2011-10-27 22:33 ` Brian King
2011-10-28 5:17 ` Nitin Gupta
2011-10-28 5:17 ` Nitin Gupta
2011-10-29 13:43 ` Ed Tomlinson
2011-10-29 13:43 ` Ed Tomlinson
2011-10-31 8:13 ` KAMEZAWA Hiroyuki
2011-10-31 8:13 ` KAMEZAWA Hiroyuki
2011-10-31 16:38 ` Dan Magenheimer
2011-10-31 16:38 ` Dan Magenheimer
2011-11-01 0:50 ` KAMEZAWA Hiroyuki
2011-11-01 0:50 ` KAMEZAWA Hiroyuki
2011-11-01 15:25 ` Dan Magenheimer
2011-11-01 15:25 ` Dan Magenheimer
2011-11-01 21:43 ` Andrew Morton
2011-11-01 21:43 ` Andrew Morton
2011-11-01 22:25 ` Dan Magenheimer
2011-11-01 22:25 ` Dan Magenheimer
2011-11-02 21:03 ` Rik van Riel
2011-11-02 21:03 ` Rik van Riel
2011-11-02 21:42 ` Dan Magenheimer
2011-11-02 21:42 ` Dan Magenheimer
2011-11-02 1:14 ` KAMEZAWA Hiroyuki
2011-11-02 1:14 ` KAMEZAWA Hiroyuki
2011-11-02 15:12 ` Dan Magenheimer
2011-11-02 15:12 ` Dan Magenheimer
2011-11-04 4:19 ` KAMEZAWA Hiroyuki
2011-11-04 4:19 ` KAMEZAWA Hiroyuki
2011-11-03 16:49 ` Jan Beulich
2011-11-03 16:49 ` Jan Beulich
2011-11-04 0:54 ` Andrew Morton
2011-11-04 0:54 ` Andrew Morton
2011-11-04 8:49 ` Jan Beulich
2011-11-04 8:49 ` Jan Beulich
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