From: Christoph Lameter <clameter@sgi.com>
To: Paul Menage <menage@google.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org,
Nick Piggin <nickpiggin@yahoo.com.au>,
linux-mm@kvack.org, Andi Kleen <ak@suse.de>,
Paul Jackson <pj@sgi.com>, Dave Chinner <dgc@sgi.com>
Subject: Re: [RFC 8/8] Reduce inode memory usage for systems with a high MAX_NUMNODES
Date: Tue, 16 Jan 2007 12:51:14 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0701161249400.3074@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <6599ad830701161206w7dff0fa8y34f1e74f94ab9051@mail.gmail.com>
On Tue, 16 Jan 2007, Paul Menage wrote:
> I was thinking runtime, unless MAX_NUMNODES is less than 64 in which
> case you can make the decision at compile time.
>
> >
> > If done at compile time then we will end up with a pointer to an unsigned
> > long for a system with <= 64 nodes. If we allocate the nodemask via
> > kmalloc then we will always end up with a mininum allocation size of 64
> > bytes.
>
> Can't we get less overhead with a slab cache with appropriate-sized objects?
Ok but then we are going to have quite small objects. Plus we will have
additional slab overhead per node.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <clameter@sgi.com>
To: Paul Menage <menage@google.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org,
Nick Piggin <nickpiggin@yahoo.com.au>,
linux-mm@kvack.org, Andi Kleen <ak@suse.de>,
Paul Jackson <pj@sgi.com>, Dave Chinner <dgc@sgi.com>
Subject: Re: [RFC 8/8] Reduce inode memory usage for systems with a high MAX_NUMNODES
Date: Tue, 16 Jan 2007 12:51:14 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0701161249400.3074@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <6599ad830701161206w7dff0fa8y34f1e74f94ab9051@mail.gmail.com>
On Tue, 16 Jan 2007, Paul Menage wrote:
> I was thinking runtime, unless MAX_NUMNODES is less than 64 in which
> case you can make the decision at compile time.
>
> >
> > If done at compile time then we will end up with a pointer to an unsigned
> > long for a system with <= 64 nodes. If we allocate the nodemask via
> > kmalloc then we will always end up with a mininum allocation size of 64
> > bytes.
>
> Can't we get less overhead with a slab cache with appropriate-sized objects?
Ok but then we are going to have quite small objects. Plus we will have
additional slab overhead per node.
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next prev parent reply other threads:[~2007-01-16 20:51 UTC|newest]
Thread overview: 220+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-16 5:47 [RFC 0/8] Cpuset aware writeback Christoph Lameter
2007-01-16 5:47 ` Christoph Lameter
2007-01-16 5:47 ` [RFC 1/8] Convert higest_possible_node_id() into nr_node_ids Christoph Lameter
2007-01-16 5:47 ` Christoph Lameter
2007-01-16 22:05 ` Andi Kleen
2007-01-16 22:05 ` Andi Kleen
2007-01-17 3:14 ` Christoph Lameter
2007-01-17 3:14 ` Christoph Lameter
2007-01-17 4:15 ` Andi Kleen
2007-01-17 4:15 ` Andi Kleen
2007-01-17 4:23 ` Christoph Lameter
2007-01-17 4:23 ` Christoph Lameter
2007-01-16 5:47 ` [RFC 2/8] Add a map to inodes to track dirty pages per node Christoph Lameter
2007-01-16 5:47 ` Christoph Lameter
2007-01-16 5:47 ` [RFC 3/8] Add a nodemask to pdflush functions Christoph Lameter
2007-01-16 5:47 ` Christoph Lameter
2007-01-16 5:48 ` [RFC 4/8] Per cpuset dirty ratio handling and writeout Christoph Lameter
2007-01-16 5:48 ` Christoph Lameter
2007-01-16 5:48 ` [RFC 5/8] Make writeout during reclaim cpuset aware Christoph Lameter
2007-01-16 5:48 ` Christoph Lameter
2007-01-16 22:07 ` Andi Kleen
2007-01-16 22:07 ` Andi Kleen
2007-01-17 4:20 ` Paul Jackson
2007-01-17 4:20 ` Paul Jackson
2007-01-17 4:28 ` Andi Kleen
2007-01-17 4:28 ` Andi Kleen
2007-01-17 4:36 ` Paul Jackson
2007-01-17 4:36 ` Paul Jackson
2007-01-17 5:59 ` Andi Kleen
2007-01-17 5:59 ` Andi Kleen
2007-01-17 6:19 ` Christoph Lameter
2007-01-17 6:19 ` Christoph Lameter
2007-01-17 4:23 ` Christoph Lameter
2007-01-17 4:23 ` Christoph Lameter
2007-01-16 5:48 ` [RFC 6/8] Throttle vm writeout per cpuset Christoph Lameter
2007-01-16 5:48 ` Christoph Lameter
2007-01-16 5:48 ` [RFC 7/8] Exclude unreclaimable pages from dirty ration calculation Christoph Lameter
2007-01-16 5:48 ` Christoph Lameter
2007-01-18 15:48 ` Nikita Danilov
2007-01-18 15:48 ` Nikita Danilov
2007-01-18 19:56 ` Christoph Lameter
2007-01-18 19:56 ` Christoph Lameter
2007-01-16 5:48 ` [RFC 8/8] Reduce inode memory usage for systems with a high MAX_NUMNODES Christoph Lameter
2007-01-16 5:48 ` Christoph Lameter
2007-01-16 19:52 ` Paul Menage
2007-01-16 19:52 ` Paul Menage
2007-01-16 20:00 ` Christoph Lameter
2007-01-16 20:00 ` Christoph Lameter
2007-01-16 20:06 ` Paul Menage
2007-01-16 20:06 ` Paul Menage
2007-01-16 20:51 ` Christoph Lameter [this message]
2007-01-16 20:51 ` Christoph Lameter
2007-01-16 7:38 ` [RFC 0/8] Cpuset aware writeback Peter Zijlstra
2007-01-16 7:38 ` Peter Zijlstra
2007-01-16 20:10 ` Christoph Lameter
2007-01-16 20:10 ` Christoph Lameter
2007-01-16 9:25 ` Paul Jackson
2007-01-16 9:25 ` Paul Jackson
2007-01-16 17:13 ` Christoph Lameter
2007-01-16 17:13 ` Christoph Lameter
2007-01-16 21:53 ` Andrew Morton
2007-01-16 21:53 ` Andrew Morton
2007-01-16 22:08 ` [PATCH] nfs: fix congestion control Peter Zijlstra
2007-01-16 22:08 ` [PATCH] nfs: fix congestion control, " Peter Zijlstra
2007-01-16 22:27 ` [PATCH] " Trond Myklebust
2007-01-16 22:27 ` Trond Myklebust
2007-01-17 2:41 ` Peter Zijlstra
2007-01-17 2:41 ` Peter Zijlstra
2007-01-17 6:15 ` Trond Myklebust
2007-01-17 6:15 ` Trond Myklebust
2007-01-17 8:49 ` Peter Zijlstra
2007-01-17 8:49 ` Peter Zijlstra
2007-01-17 13:50 ` Trond Myklebust
2007-01-17 13:50 ` Trond Myklebust
2007-01-17 14:29 ` Peter Zijlstra
2007-01-17 14:29 ` Peter Zijlstra
2007-01-17 14:45 ` Trond Myklebust
2007-01-17 14:45 ` Trond Myklebust
2007-01-17 20:05 ` Christoph Lameter
2007-01-17 20:05 ` Christoph Lameter
2007-01-17 21:52 ` Peter Zijlstra
2007-01-17 21:52 ` Peter Zijlstra
2007-01-17 21:54 ` Trond Myklebust
2007-01-17 21:54 ` Trond Myklebust
2007-01-18 13:27 ` Peter Zijlstra
2007-01-18 13:27 ` Peter Zijlstra
2007-01-18 15:49 ` Trond Myklebust
2007-01-18 15:49 ` Trond Myklebust
2007-01-19 9:33 ` Peter Zijlstra
2007-01-19 9:33 ` Peter Zijlstra
2007-01-19 13:07 ` Peter Zijlstra
2007-01-19 13:07 ` Peter Zijlstra
2007-01-19 16:51 ` Trond Myklebust
2007-01-19 16:51 ` Trond Myklebust
2007-01-19 17:54 ` Peter Zijlstra
2007-01-19 17:54 ` Peter Zijlstra
2007-01-19 17:20 ` Christoph Lameter
2007-01-19 17:20 ` Christoph Lameter
2007-01-19 17:57 ` Peter Zijlstra
2007-01-19 17:57 ` Peter Zijlstra
2007-01-19 18:02 ` Christoph Lameter
2007-01-19 18:02 ` Christoph Lameter
2007-01-19 18:26 ` Trond Myklebust
2007-01-19 18:26 ` Trond Myklebust
2007-01-19 18:27 ` Christoph Lameter
2007-01-19 18:27 ` Christoph Lameter
2007-01-20 7:01 ` [PATCH] nfs: fix congestion control -v3 Peter Zijlstra
2007-01-20 7:01 ` [PATCH] nfs: fix congestion control -v3, nfs: fix congestion control Peter Zijlstra
2007-01-22 16:12 ` [PATCH] nfs: fix congestion control -v3 Trond Myklebust
2007-01-22 16:12 ` Trond Myklebust
2007-01-25 15:32 ` [PATCH] nfs: fix congestion control -v4 Peter Zijlstra
2007-01-25 15:32 ` Peter Zijlstra
2007-01-26 5:02 ` Andrew Morton
2007-01-26 5:02 ` Andrew Morton
2007-01-26 8:00 ` Peter Zijlstra
2007-01-26 8:00 ` Peter Zijlstra
2007-01-26 8:50 ` Peter Zijlstra
2007-01-26 8:50 ` Peter Zijlstra
2007-01-26 5:09 ` Andrew Morton
2007-01-26 5:09 ` Andrew Morton
2007-01-26 5:31 ` Christoph Lameter
2007-01-26 5:31 ` Christoph Lameter
2007-01-26 6:04 ` Andrew Morton
2007-01-26 6:04 ` Andrew Morton
2007-01-26 6:53 ` Christoph Lameter
2007-01-26 6:53 ` Christoph Lameter
2007-01-26 8:03 ` Peter Zijlstra
2007-01-26 8:03 ` Peter Zijlstra
2007-01-26 8:51 ` Andrew Morton
2007-01-26 8:51 ` Andrew Morton
2007-01-26 9:01 ` Peter Zijlstra
2007-01-26 9:01 ` Peter Zijlstra
2007-02-20 12:59 ` Peter Zijlstra
2007-02-20 12:59 ` Peter Zijlstra
2007-01-22 17:59 ` [PATCH] nfs: fix congestion control -v3 Christoph Lameter
2007-01-22 17:59 ` Christoph Lameter
2007-01-17 23:15 ` [PATCH] nfs: fix congestion control Christoph Hellwig
2007-01-17 23:15 ` Christoph Hellwig
2007-01-16 22:15 ` [RFC 0/8] Cpuset aware writeback Christoph Lameter
2007-01-16 22:15 ` Christoph Lameter
2007-01-16 23:40 ` Andrew Morton
2007-01-16 23:40 ` Andrew Morton
2007-01-17 0:16 ` Christoph Lameter
2007-01-17 0:16 ` Christoph Lameter
2007-01-17 1:07 ` Andrew Morton
2007-01-17 1:07 ` Andrew Morton
2007-01-17 1:30 ` Christoph Lameter
2007-01-17 1:30 ` Christoph Lameter
2007-01-17 2:34 ` Andrew Morton
2007-01-17 2:34 ` Andrew Morton
2007-01-17 3:40 ` Christoph Lameter
2007-01-17 3:40 ` Christoph Lameter
2007-01-17 4:02 ` Paul Jackson
2007-01-17 4:02 ` Paul Jackson
2007-01-17 4:05 ` Andrew Morton
2007-01-17 4:05 ` Andrew Morton
2007-01-17 6:27 ` Christoph Lameter
2007-01-17 6:27 ` Christoph Lameter
2007-01-17 7:00 ` Andrew Morton
2007-01-17 7:00 ` Andrew Morton
2007-01-17 8:01 ` Paul Jackson
2007-01-17 8:01 ` Paul Jackson
2007-01-17 9:57 ` Andrew Morton
2007-01-17 9:57 ` Andrew Morton
2007-01-17 19:43 ` Christoph Lameter
2007-01-17 19:43 ` Christoph Lameter
2007-01-17 22:10 ` Andrew Morton
2007-01-17 22:10 ` Andrew Morton
2007-01-18 1:10 ` Christoph Lameter
2007-01-18 1:10 ` Christoph Lameter
2007-01-18 1:25 ` Andrew Morton
2007-01-18 1:25 ` Andrew Morton
2007-01-18 5:21 ` Christoph Lameter
2007-01-18 5:21 ` Christoph Lameter
2007-01-16 23:44 ` David Chinner
2007-01-16 23:44 ` David Chinner
2007-01-16 22:01 ` Andi Kleen
2007-01-16 22:01 ` Andi Kleen
2007-01-16 22:18 ` Christoph Lameter
2007-01-16 22:18 ` Christoph Lameter
2007-02-02 1:38 ` Ethan Solomita
2007-02-02 1:38 ` Ethan Solomita
2007-02-02 2:16 ` Christoph Lameter
2007-02-02 2:16 ` Christoph Lameter
2007-02-02 4:03 ` Andrew Morton
2007-02-02 4:03 ` Andrew Morton
2007-02-02 5:29 ` Christoph Lameter
2007-02-02 5:29 ` Christoph Lameter
2007-02-02 6:02 ` Neil Brown
2007-02-02 6:02 ` Neil Brown
2007-02-02 6:17 ` Christoph Lameter
2007-02-02 6:17 ` Christoph Lameter
2007-02-02 6:41 ` Neil Brown
2007-02-02 6:41 ` Neil Brown
2007-02-02 7:12 ` Andrew Morton
2007-02-02 7:12 ` Andrew Morton
2007-03-21 21:11 ` Ethan Solomita
2007-03-21 21:11 ` Ethan Solomita
2007-03-21 21:29 ` Christoph Lameter
2007-03-21 21:29 ` Christoph Lameter
2007-03-21 21:52 ` Andrew Morton
2007-03-21 21:52 ` Andrew Morton
2007-03-21 21:57 ` Christoph Lameter
2007-03-21 21:57 ` Christoph Lameter
2007-04-19 2:07 ` Ethan Solomita
2007-04-19 2:07 ` Ethan Solomita
2007-04-19 2:55 ` Christoph Lameter
2007-04-19 2:55 ` Christoph Lameter
2007-04-19 7:52 ` Ethan Solomita
2007-04-19 7:52 ` Ethan Solomita
2007-04-19 16:03 ` Christoph Lameter
2007-04-19 16:03 ` Christoph Lameter
2007-04-21 1:37 ` Ethan Solomita
2007-04-21 1:37 ` Ethan Solomita
2007-04-21 1:48 ` Christoph Lameter
2007-04-21 1:48 ` Christoph Lameter
2007-04-21 8:15 ` Ethan Solomita
2007-04-21 8:15 ` Ethan Solomita
2007-04-21 15:40 ` Christoph Lameter
2007-04-21 15:40 ` Christoph Lameter
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