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From: Andrew Morton <akpm@osdl.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: a.p.zijlstra@chello.nl, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, hugh@veritas.com,
	dhowells@redhat.com, christoph@lameter.com, mbligh@google.com,
	npiggin@suse.de, torvalds@osdl.org
Subject: Re: [PATCH 1/6] mm: tracking shared dirty pages
Date: Wed, 21 Jun 2006 23:15:00 -0700	[thread overview]
Message-ID: <20060621231500.7d00dba4.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0606212305240.25441@schroedinger.engr.sgi.com>

On Wed, 21 Jun 2006 23:07:37 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> On Wed, 21 Jun 2006, Andrew Morton wrote:
> 
> > Performance testing is critical here.  I think some was done, but I don't
> > reall what tests were performed, nor do I remember the results.  Without such
> > info it's not possible to make a go/no-go decision.
> 
> Tests did show that there was no performance regression for the usual 
> tests. That is to be expected since the patch should only modify the 
> behavior of shared writable mapping. The use of those is rare in typical 
> benchmarks.

Of course.  In this case one should prepare an artificial microbenchmark so
we can understand the worst case.

  reply	other threads:[~2006-06-22  6:15 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-19 17:52 [PATCH 0/6] mm: tracking dirty pages -v9 Peter Zijlstra
2006-06-19 17:52 ` [PATCH 1/6] mm: tracking shared dirty pages Peter Zijlstra
2006-06-22  5:56   ` Andrew Morton
2006-06-22  6:07     ` Christoph Lameter
2006-06-22  6:15       ` Andrew Morton [this message]
2006-06-22 11:33     ` Peter Zijlstra
2006-06-22 13:17       ` Hugh Dickins
2006-06-22 20:52   ` Hugh Dickins
2006-06-22 23:02     ` Peter Zijlstra
2006-06-22 23:39     ` [PATCH] mm: tracking shared dirty pages -v10 Peter Zijlstra
2006-06-23  3:10       ` Jeff Dike
2006-06-23  3:31         ` Andrew Morton
2006-06-23  3:50           ` Jeff Dike
2006-06-23  4:01           ` H. Peter Anvin
2006-06-23 15:08             ` Jeff Dike
2006-06-23  6:08       ` Linus Torvalds
2006-06-23  7:27         ` Hugh Dickins
2006-06-23 17:00           ` Christoph Lameter
2006-06-23 17:22             ` Peter Zijlstra
2006-06-23 17:52               ` Christoph Lameter
2006-06-23 18:11                 ` Martin Bligh
2006-06-23 18:20                   ` Linus Torvalds
2006-06-23 17:56               ` Linus Torvalds
2006-06-23 18:03                 ` Peter Zijlstra
2006-06-23 18:23                   ` Christoph Lameter
2006-06-23 18:41                 ` Christoph Hellwig
2006-06-23 17:49           ` Linus Torvalds
2006-06-23 18:05             ` Arjan van de Ven
2006-06-23 18:08             ` Miklos Szeredi
2006-06-23 19:06       ` Hugh Dickins
2006-06-23 22:00         ` Peter Zijlstra
2006-06-23 22:35           ` Linus Torvalds
2006-06-23 22:44             ` Peter Zijlstra
2006-06-28 14:58         ` [RFC][PATCH] mm: fixup do_wp_page() Peter Zijlstra
2006-06-28 18:20           ` Hugh Dickins
2006-06-19 17:53 ` [PATCH 2/6] mm: balance dirty pages Peter Zijlstra
2006-06-19 17:53 ` [PATCH 3/6] mm: msync() cleanup Peter Zijlstra
2006-06-22 17:02   ` Hugh Dickins
2006-06-19 17:53 ` [PATCH 4/6] mm: optimize the new mprotect() code a bit Peter Zijlstra
2006-06-22 17:21   ` Hugh Dickins
2006-06-19 17:53 ` [PATCH 5/6] mm: small cleanup of install_page() Peter Zijlstra
2006-06-19 17:53 ` [PATCH 6/6] mm: remove some update_mmu_cache() calls Peter Zijlstra
2006-06-22 16:29   ` Hugh Dickins
2006-06-22 16:37     ` Christoph Lameter
2006-06-22 17:35       ` Hugh Dickins
2006-06-22 18:31         ` Christoph Lameter
  -- strict thread matches above, loose matches on Subject: below --
2006-06-28 20:17 [PATCH 0/6] mm: tracking dirty pages -v14 Peter Zijlstra
2006-06-28 20:17 ` [PATCH 1/6] mm: tracking shared dirty pages Peter Zijlstra
2006-06-13 11:21 [PATCH 0/6] mm: tracking dirty pages -v8 Peter Zijlstra
2006-06-13 11:21 ` [PATCH 1/6] mm: tracking shared dirty pages Peter Zijlstra
2006-06-13 12:03   ` Andi Kleen
2006-06-13 12:15     ` Peter Zijlstra
2006-06-13 12:24       ` Nick Piggin

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