From: Andrea Arcangeli <andrea@cpushare.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>
Subject: Re: [PATCH 10 of 11] limit reclaim if enough pages have been freed
Date: Tue, 8 Jan 2008 08:28:12 +0100 [thread overview]
Message-ID: <20080108072812.GA22800@v2.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0801071135380.23617@schroedinger.engr.sgi.com>
On Mon, Jan 07, 2008 at 11:37:19AM -0800, Christoph Lameter wrote:
> On Thu, 3 Jan 2008, Andrea Arcangeli wrote:
>
> > No need to wipe out an huge chunk of the cache.
>
> Wiping out a larger chunk of the cache avoids triggering reclaim too
> frequently.
The idea is that if you want to wipe a larger chunk to batch reclaim
more aggressively you can add a new param in addition to
swap-cluster-max. But wiping such a chunk as large as it is now sounds
bad for latency reasons (think also -rt... ok any -rt guarantee is
gone the moment you enter the VM, but still this spot is easy to fix
and benefits all my kernels with PREEMPT=n too).
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next prev parent reply other threads:[~2008-01-08 7:28 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-03 2:09 [PATCH 00 of 11] oom deadlock fixes Andrea Arcangeli
2008-01-03 2:09 ` [PATCH 01 of 11] limit shrink zone scanning Andrea Arcangeli
2008-01-07 19:11 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 02 of 11] avoid oom deadlock in nfs_create_request Andrea Arcangeli
2008-01-07 19:13 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 03 of 11] prevent oom deadlocks during read/write operations Andrea Arcangeli
2008-01-07 19:15 ` Christoph Lameter
2008-01-07 19:26 ` Andrea Arcangeli
2008-01-03 2:09 ` [PATCH 04 of 11] avoid selecting already killed tasks Andrea Arcangeli
2008-01-03 9:40 ` David Rientjes
2008-01-03 13:41 ` Andrea Arcangeli
2008-01-03 18:47 ` David Rientjes
2008-01-03 19:54 ` Andrea Arcangeli
2008-01-03 20:49 ` David Rientjes
2008-01-07 19:17 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 05 of 11] reduce the probability of an OOM livelock Andrea Arcangeli
2008-01-07 19:32 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 06 of 11] balance_pgdat doesn't return the number of pages freed Andrea Arcangeli
2008-01-07 19:33 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 07 of 11] don't depend on PF_EXITING tasks to go away Andrea Arcangeli
2008-01-03 9:52 ` David Rientjes
2008-01-03 13:29 ` Andrea Arcangeli
2008-01-03 2:09 ` [PATCH 08 of 11] stop useless vm trashing while we wait the TIF_MEMDIE task to exit Andrea Arcangeli
2008-01-03 2:09 ` [PATCH 09 of 11] oom select should only take rss into account Andrea Arcangeli
2008-01-07 19:35 ` Christoph Lameter
2008-01-03 2:09 ` [PATCH 10 of 11] limit reclaim if enough pages have been freed Andrea Arcangeli
2008-01-07 19:37 ` Christoph Lameter
2008-01-08 7:28 ` Andrea Arcangeli [this message]
2008-01-03 2:09 ` [PATCH 11 of 11] not-wait-memdie Andrea Arcangeli
2008-01-03 9:55 ` David Rientjes
2008-01-03 13:06 ` Andrea Arcangeli
2008-01-03 18:54 ` David Rientjes
2008-01-07 19:43 ` Christoph Lameter
2008-01-08 1:57 ` David Rientjes
2008-01-08 3:25 ` Nick Piggin
2008-01-08 3:37 ` David Rientjes
2008-01-08 7:42 ` Nick Piggin
2008-01-08 7:45 ` Andrea Arcangeli
2008-01-08 7:37 ` Andrea Arcangeli
2008-01-08 7:31 ` Andrea Arcangeli
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