From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [QUICKLIST 1/5] Quicklists for page table pages V4
Date: Thu, 22 Mar 2007 22:39:27 -0800 [thread overview]
Message-ID: <20070322223927.bb4caf43.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070323062843.19502.19827.sendpatchset@schroedinger.engr.sgi.com>
On Thu, 22 Mar 2007 23:28:41 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> 1. Proven code from the IA64 arch.
>
> The method used here has been fine tuned for years and
> is NUMA aware. It is based on the knowledge that accesses
> to page table pages are sparse in nature. Taking a page
> off the freelists instead of allocating a zeroed pages
> allows a reduction of number of cachelines touched
> in addition to getting rid of the slab overhead. So
> performance improves.
By how much?
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [QUICKLIST 1/5] Quicklists for page table pages V4
Date: Thu, 22 Mar 2007 22:39:27 -0800 [thread overview]
Message-ID: <20070322223927.bb4caf43.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070323062843.19502.19827.sendpatchset@schroedinger.engr.sgi.com>
On Thu, 22 Mar 2007 23:28:41 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> 1. Proven code from the IA64 arch.
>
> The method used here has been fine tuned for years and
> is NUMA aware. It is based on the knowledge that accesses
> to page table pages are sparse in nature. Taking a page
> off the freelists instead of allocating a zeroed pages
> allows a reduction of number of cachelines touched
> in addition to getting rid of the slab overhead. So
> performance improves.
By how much?
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next prev parent reply other threads:[~2007-03-23 6:39 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-23 6:28 [QUICKLIST 1/5] Quicklists for page table pages V4 Christoph Lameter
2007-03-23 6:28 ` Christoph Lameter
2007-03-23 6:28 ` [QUICKLIST 2/5] Quicklist support for IA64 Christoph Lameter
2007-03-23 6:28 ` Christoph Lameter
2007-03-23 6:28 ` [QUICKLIST 3/5] Quicklist support for i386 Christoph Lameter
2007-03-23 6:28 ` Christoph Lameter
2007-03-23 6:28 ` [QUICKLIST 4/5] Quicklist support for x86_64 Christoph Lameter
2007-03-23 6:28 ` Christoph Lameter
2007-03-23 6:29 ` [QUICKLIST 5/5] Quicklist support for sparc64 Christoph Lameter
2007-03-23 6:29 ` Christoph Lameter, David Miller
2007-03-23 6:39 ` Andrew Morton [this message]
2007-03-23 6:39 ` [QUICKLIST 1/5] Quicklists for page table pages V4 Andrew Morton
2007-03-23 6:52 ` Christoph Lameter
2007-03-23 6:52 ` Christoph Lameter
2007-03-23 7:48 ` Andrew Morton
2007-03-23 7:48 ` Andrew Morton
2007-03-23 11:23 ` William Lee Irwin III
2007-03-23 11:23 ` William Lee Irwin III
2007-03-23 14:58 ` Christoph Lameter
2007-03-23 14:58 ` Christoph Lameter
2007-03-23 11:29 ` William Lee Irwin III
2007-03-23 11:29 ` William Lee Irwin III
2007-03-23 14:57 ` William Lee Irwin III
2007-03-23 14:57 ` William Lee Irwin III
2007-03-23 19:17 ` William Lee Irwin III
2007-03-23 19:17 ` William Lee Irwin III
2007-03-23 11:39 ` Nick Piggin
2007-03-23 11:39 ` Nick Piggin
2007-03-24 5:14 ` Andrew Morton
2007-03-24 5:14 ` Andrew Morton
2007-03-23 15:08 ` Christoph Lameter
2007-03-23 15:08 ` Christoph Lameter
2007-03-23 17:54 ` Christoph Lameter
2007-03-23 17:54 ` Christoph Lameter
2007-03-24 6:21 ` Andrew Morton
2007-03-24 6:21 ` Andrew Morton
2007-03-26 16:52 ` Christoph Lameter
2007-03-26 16:52 ` Christoph Lameter
2007-03-26 18:14 ` Christoph Lameter
2007-03-26 18:14 ` Christoph Lameter
2007-03-26 18:26 ` Andrew Morton
2007-03-26 18:26 ` Andrew Morton
2007-03-27 1:06 ` William Lee Irwin III
2007-03-27 1:06 ` William Lee Irwin III
2007-03-27 1:22 ` Christoph Lameter
2007-03-27 1:22 ` Christoph Lameter
2007-03-27 1:45 ` David Miller
2007-03-27 1:45 ` David Miller, William Lee Irwin III
2007-03-27 11:19 ` William Lee Irwin III
2007-03-27 11:19 ` William Lee Irwin III
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