From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
miklos@szeredi.hu, neilb@suse.de, dgc@sgi.com,
tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com,
trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com
Subject: Re: [PATCH 10/10] mm: per device dirty threshold
Date: Mon, 23 Apr 2007 17:58:20 +0200 [thread overview]
Message-ID: <1177343900.26937.6.camel@twins> (raw)
In-Reply-To: <Pine.LNX.4.64.0704230847400.10624@schroedinger.engr.sgi.com>
On Mon, 2007-04-23 at 08:48 -0700, Christoph Lameter wrote:
> On Sat, 21 Apr 2007, Peter Zijlstra wrote:
>
> > > > This is enormously wrong for CONFIG_NR_CPUS=1024 on a 2-way.
> >
> > Right, I knew about that but, uhm.
> >
> > I wanted to make that num_online_cpus(), and install a hotplug notifier
> > to fold the percpu delta back into the total on cpu offline.
>
> Use nr_cpu_ids instead. Contains the maximum possible cpus on this
> hardware and allows to handle the hotplug case easily.
Ooh, thats handy... /me ditches the hotplug code again.
That is, unless its very common to have half empty boxens.. ?
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next prev parent reply other threads:[~2007-04-23 15:58 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-20 15:51 [PATCH 00/10] per device dirty throttling -v5 Peter Zijlstra
2007-04-20 15:51 ` [PATCH 01/10] revert per-backing_dev-dirty-and-writeback-page-accounting Peter Zijlstra
2007-04-20 15:51 ` [PATCH 02/10] nfs: remove congestion_end() Peter Zijlstra
2007-04-20 15:51 ` [PATCH 03/10] lib: dampen the percpu_counter FBC_BATCH Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 10:58 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 04/10] lib: percpu_counter_mod64 Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:02 ` Peter Zijlstra
2007-04-21 19:21 ` Andrew Morton
2007-04-21 19:30 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 05/10] mm: bdi init hooks Peter Zijlstra
2007-04-20 15:52 ` [PATCH 06/10] mm: scalable bdi statistics counters Peter Zijlstra
2007-04-20 15:52 ` [PATCH 07/10] mm: count reclaimable pages per BDI Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:04 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 08/10] mm: count writeback " Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:07 ` Peter Zijlstra
2007-04-22 7:19 ` Andrew Morton
2007-04-22 9:08 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 09/10] mm: expose BDI statistics in sysfs Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:08 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 10/10] mm: per device dirty threshold Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 10:38 ` Miklos Szeredi
2007-04-21 10:54 ` Andrew Morton
2007-04-21 20:25 ` Miklos Szeredi
2007-04-23 6:14 ` Peter Zijlstra
2007-04-23 6:29 ` Miklos Szeredi
2007-04-23 6:39 ` Andrew Morton
2007-04-21 12:01 ` Peter Zijlstra
2007-04-21 12:15 ` Peter Zijlstra
2007-04-21 19:50 ` Peter Zijlstra
2007-04-23 15:48 ` Christoph Lameter
2007-04-23 15:58 ` Peter Zijlstra [this message]
2007-04-23 16:08 ` Christoph Lameter
2007-04-22 7:26 ` Andrew Morton
2007-04-24 2:58 ` Neil Brown
2007-04-24 7:09 ` Peter Zijlstra
2007-04-24 8:19 ` Miklos Szeredi
2007-04-24 8:31 ` Peter Zijlstra
2007-04-24 9:14 ` Miklos Szeredi
2007-04-24 9:26 ` Peter Zijlstra
2007-04-24 9:47 ` Miklos Szeredi
2007-04-24 10:00 ` Andrew Morton
2007-04-24 10:12 ` Peter Zijlstra
2007-04-24 10:19 ` Miklos Szeredi
2007-04-24 10:24 ` Peter Zijlstra
2007-04-24 10:40 ` Andrew Morton
2007-04-24 11:22 ` Miklos Szeredi
2007-04-24 11:50 ` Andrew Morton
2007-04-24 12:07 ` Miklos Szeredi
2007-04-22 9:57 ` [PATCH 00/10] per device dirty throttling -v5 Andrew Morton
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