From: Andrea Arcangeli <andrea@suse.de>
To: Wu Fengguang <wfg@mail.ustc.edu.cn>,
Andrew Morton <akpm@osdl.org>,
marcelo.tosatti@cyclades.com, linux-kernel@vger.kernel.org,
christoph@lameter.com, riel@redhat.com, a.p.zijlstra@chello.nl,
npiggin@suse.de, magnus.damm@gmail.com
Subject: Re: [PATCH 02/12] mm: supporting variables and functions for balanced zone aging
Date: Fri, 2 Dec 2005 03:18:11 +0100 [thread overview]
Message-ID: <20051202021811.GB28539@opteron.random> (raw)
In-Reply-To: <20051202020407.GA4445@mail.ustc.edu.cn>
On Fri, Dec 02, 2005 at 10:04:07AM +0800, Wu Fengguang wrote:
> btw, maybe it's time to lower the low_mem_reserve.
> There should be no need to keep ~50M free memory with the balancing patch.
low_mem_reserve is indipendent from shrink_cache, because shrink_cache can't
free unfreeable pinned memory.
If you want to remove low_mem_reserve you'd better start by adding
migration of memory across the zones with pte updates etc... That would
at least mitigate the effect of anonymous memory w/o swap. But
low_mem_reserve is still needed for all other kind of allocations like
kmalloc or pci_alloc_consistent (i.e. not relocatable) etc...
next prev parent reply other threads:[~2005-12-02 2:18 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 [this message]
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
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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