From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 21 Jun 2006 23:15:00 -0700 From: Andrew Morton Subject: Re: [PATCH 1/6] mm: tracking shared dirty pages Message-Id: <20060621231500.7d00dba4.akpm@osdl.org> In-Reply-To: References: <20060619175243.24655.76005.sendpatchset@lappy> <20060619175253.24655.96323.sendpatchset@lappy> <20060621225639.4c8bad93.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter 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 List-ID: On Wed, 21 Jun 2006 23:07:37 -0700 (PDT) Christoph Lameter 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. -- 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: email@kvack.org