From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Wu Fengguang <wfg@mail.ustc.edu.cn>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
Christoph Lameter <christoph@lameter.com>,
Rik van Riel <riel@redhat.com>, Nick Piggin <npiggin@suse.de>,
Andrea Arcangeli <andrea@suse.de>,
Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
Magnus Damm <magnus.damm@gmail.com>
Subject: Re: [PATCH 06/12] mm: balance active/inactive list scan rates
Date: Thu, 01 Dec 2005 12:39:28 +0100 [thread overview]
Message-ID: <1133437168.25941.10.camel@localhost.localdomain> (raw)
In-Reply-To: <20051201102035.606043000@localhost.localdomain>
On Thu, 2005-12-01 at 18:18 +0800, Wu Fengguang wrote:
> plain text document attachment
> (mm-balance-active-inactive-list-aging.patch)
> shrink_zone() has two major design goals:
> 1) let active/inactive lists have equal scan rates
> 2) do the scans in small chunks
>
> The new design:
> 1) keep perfect balance
> let active_list follow inactive_list in scan rate
>
> 2) always scan in SWAP_CLUSTER_MAX sized chunks
> simple and efficient
>
> 3) will scan at least one chunk
> the expected behavior from the callers
>
> The perfect balance may or may not yield better performance, though it
> a) is a more understandable and dependable behavior
> b) together with inter-zone balancing, makes the zoned memories consistent
Nice, this patch effectively separates zone balancing from
active/inactive balancing. I was thinking about doing this this morning
in order to nicely abstract out all the page-replacement code.
Thanks!
next prev parent reply other threads:[~2005-12-01 11:39 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-01 10:18 [PATCH 00/12] Balancing the scan rate of major caches Wu Fengguang
2005-12-01 10:18 ` [PATCH 01/12] vm: kswapd incmin Wu Fengguang
2005-12-01 10:33 ` Andrew Morton
2005-12-01 11:40 ` Wu Fengguang
2005-12-01 10:18 ` [PATCH 02/12] mm: supporting variables and functions for balanced zone aging Wu Fengguang
2005-12-01 10:37 ` Andrew Morton
2005-12-01 12:11 ` Wu Fengguang
2005-12-01 22:28 ` Marcelo Tosatti
2005-12-01 23:03 ` Andrew Morton
2005-12-02 1:19 ` Wu Fengguang
2005-12-02 1:30 ` Andrew Morton
2005-12-02 2:04 ` Wu Fengguang
2005-12-02 2:18 ` Andrea Arcangeli
2005-12-02 2:37 ` Wu Fengguang
2005-12-02 2:52 ` Andrea Arcangeli
2005-12-02 4:45 ` Andrew Morton
2005-12-02 6:38 ` Wu Fengguang
2005-12-02 2:27 ` Nick Piggin
2005-12-02 2:36 ` Andrea Arcangeli
2005-12-02 2:43 ` Wu Fengguang
2005-12-02 5:49 ` Andrew Morton
2005-12-02 7:18 ` Wu Fengguang
2005-12-02 7:27 ` Andrew Morton
2005-12-02 15:13 ` Marcelo Tosatti
2005-12-02 21:39 ` Andrew Morton
2005-12-03 0:26 ` Marcelo Tosatti
2005-12-04 6:06 ` Wu Fengguang
2005-12-02 1:26 ` Marcelo Tosatti
2005-12-02 3:40 ` Andrew Morton
2005-12-01 10:18 ` [PATCH 03/12] mm: balance zone aging in direct reclaim path Wu Fengguang
2005-12-01 10:18 ` [PATCH 04/12] mm: balance zone aging in kswapd " Wu Fengguang
2005-12-01 10:18 ` [PATCH 05/12] mm: balance slab aging Wu Fengguang
2005-12-01 10:18 ` [PATCH 06/12] mm: balance active/inactive list scan rates Wu Fengguang
2005-12-01 11:39 ` Peter Zijlstra [this message]
2005-12-01 10:18 ` [PATCH 07/12] mm: remove unnecessary variable and loop Wu Fengguang
2005-12-01 10:18 ` [PATCH 08/12] mm: remove swap_cluster_max from scan_control Wu Fengguang
2005-12-01 10:18 ` [PATCH 09/12] mm: accumulate sc.nr_scanned/sc.nr_reclaimed Wu Fengguang
2005-12-01 10:18 ` [PATCH 10/12] mm: merge sc.may_writepage and sc.may_swap into sc.flags Wu Fengguang
2005-12-01 10:18 ` [PATCH 11/12] mm: add page reclaim debug traces Wu Fengguang
2005-12-01 10:18 ` [PATCH 12/12] mm: fix minor scan count bugs Wu Fengguang
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