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.. ?
WARNING: multiple messages have this Message-ID (diff)
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.. ?
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2007-04-23 15:58 UTC|newest]
Thread overview: 110+ 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 ` 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 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 02/10] nfs: remove congestion_end() Peter Zijlstra
2007-04-20 15:51 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 03/10] lib: dampen the percpu_counter FBC_BATCH Peter Zijlstra
2007-04-20 15:51 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 10:58 ` Peter Zijlstra
2007-04-21 10:58 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 04/10] lib: percpu_counter_mod64 Peter Zijlstra
2007-04-20 15:51 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:02 ` Peter Zijlstra
2007-04-21 11:02 ` Peter Zijlstra
2007-04-21 19:21 ` Andrew Morton
2007-04-21 19:21 ` Andrew Morton
2007-04-21 19:30 ` Peter Zijlstra
2007-04-21 19:30 ` Peter Zijlstra
2007-04-20 15:51 ` [PATCH 05/10] mm: bdi init hooks Peter Zijlstra
2007-04-20 15:51 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 06/10] mm: scalable bdi statistics counters Peter Zijlstra
2007-04-20 15:52 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 07/10] mm: count reclaimable pages per BDI Peter Zijlstra
2007-04-20 15:52 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:04 ` Peter Zijlstra
2007-04-21 11:04 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 08/10] mm: count writeback " Peter Zijlstra
2007-04-20 15:52 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:07 ` Peter Zijlstra
2007-04-21 11:07 ` Peter Zijlstra
2007-04-22 7:19 ` Andrew Morton
2007-04-22 7:19 ` Andrew Morton
2007-04-22 9:08 ` Peter Zijlstra
2007-04-22 9:08 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 09/10] mm: expose BDI statistics in sysfs Peter Zijlstra
2007-04-20 15:52 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 11:08 ` Peter Zijlstra
2007-04-21 11:08 ` Peter Zijlstra
2007-04-20 15:52 ` [PATCH 10/10] mm: per device dirty threshold Peter Zijlstra
2007-04-20 15:52 ` Peter Zijlstra
2007-04-21 9:55 ` Andrew Morton
2007-04-21 9:55 ` Andrew Morton
2007-04-21 10:38 ` Miklos Szeredi
2007-04-21 10:38 ` Miklos Szeredi
2007-04-21 10:54 ` Andrew Morton
2007-04-21 10:54 ` Andrew Morton
2007-04-21 20:25 ` Miklos Szeredi
2007-04-21 20:25 ` Miklos Szeredi
2007-04-23 6:14 ` Peter Zijlstra
2007-04-23 6:14 ` Peter Zijlstra
2007-04-23 6:29 ` Miklos Szeredi
2007-04-23 6:29 ` Miklos Szeredi
2007-04-23 6:39 ` Andrew Morton
2007-04-23 6:39 ` Andrew Morton
2007-04-21 12:01 ` Peter Zijlstra
2007-04-21 12:01 ` Peter Zijlstra
2007-04-21 12:15 ` Peter Zijlstra
2007-04-21 12:15 ` Peter Zijlstra
2007-04-21 19:50 ` Peter Zijlstra
2007-04-21 19:50 ` Peter Zijlstra
2007-04-23 15:48 ` Christoph Lameter
2007-04-23 15:48 ` Christoph Lameter
2007-04-23 15:58 ` Peter Zijlstra [this message]
2007-04-23 15:58 ` Peter Zijlstra
2007-04-23 16:08 ` Christoph Lameter
2007-04-23 16:08 ` Christoph Lameter
2007-04-22 7:26 ` Andrew Morton
2007-04-22 7:26 ` Andrew Morton
2007-04-24 2:58 ` Neil Brown
2007-04-24 2:58 ` Neil Brown
2007-04-24 7:09 ` Peter Zijlstra
2007-04-24 7:09 ` Peter Zijlstra
2007-04-24 8:19 ` Miklos Szeredi
2007-04-24 8:19 ` Miklos Szeredi
2007-04-24 8:31 ` Peter Zijlstra
2007-04-24 8:31 ` Peter Zijlstra
2007-04-24 9:14 ` Miklos Szeredi
2007-04-24 9:14 ` Miklos Szeredi
2007-04-24 9:26 ` Peter Zijlstra
2007-04-24 9:26 ` Peter Zijlstra
2007-04-24 9:47 ` Miklos Szeredi
2007-04-24 9:47 ` Miklos Szeredi
2007-04-24 10:00 ` Andrew Morton
2007-04-24 10:00 ` Andrew Morton
2007-04-24 10:12 ` Peter Zijlstra
2007-04-24 10:12 ` Peter Zijlstra
2007-04-24 10:19 ` Miklos Szeredi
2007-04-24 10:19 ` Miklos Szeredi
2007-04-24 10:24 ` Peter Zijlstra
2007-04-24 10:24 ` Peter Zijlstra
2007-04-24 10:40 ` Andrew Morton
2007-04-24 10:40 ` Andrew Morton
2007-04-24 11:22 ` Miklos Szeredi
2007-04-24 11:22 ` Miklos Szeredi
2007-04-24 11:50 ` Andrew Morton
2007-04-24 11:50 ` Andrew Morton
2007-04-24 12:07 ` Miklos Szeredi
2007-04-24 12:07 ` Miklos Szeredi
2007-04-22 9:57 ` [PATCH 00/10] per device dirty throttling -v5 Andrew Morton
2007-04-22 9:57 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1177343900.26937.6.camel@twins \
--to=a.p.zijlstra@chello.nl \
--cc=akpm@linux-foundation.org \
--cc=clameter@sgi.com \
--cc=dgc@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=miklos@szeredi.hu \
--cc=neilb@suse.de \
--cc=nikita@clusterfs.com \
--cc=tomoki.sekiyama.qu@hitachi.com \
--cc=trond.myklebust@fys.uio.no \
--cc=yingchao.zhou@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.