From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45E8B147.4070104@redhat.com> Date: Fri, 02 Mar 2007 18:20:39 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: The performance and behaviour of the anti-fragmentation related patches References: <20070301101249.GA29351@skynet.ie> <20070301160915.6da876c5.akpm@linux-foundation.org> <45E842F6.5010105@redhat.com> <20070302085838.bcf9099e.akpm@linux-foundation.org> <20070302093501.34c6ef2a.akpm@linux-foundation.org> <45E8624E.2080001@redhat.com> <20070302100619.cec06d6a.akpm@linux-foundation.org> <45E86BA0.50508@redhat.com> <20070302211207.GJ10643@holomorphy.com> <45E894D7.2040309@redhat.com> <20070302135243.ada51084.akpm@linux-foundation.org> <45E89F1E.8020803@redhat.com> <20070302142256.0127f5ac.akpm@linux-foundation.org> <45E8A677.7000205@redhat.com> <20070302145906.653d3b82.akpm@linux-foundation.org> In-Reply-To: <20070302145906.653d3b82.akpm@linux-foundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Bill Irwin , Christoph Lameter , Mel Gorman , npiggin@suse.de, mingo@elte.hu, jschopp@austin.ibm.com, arjan@infradead.org, torvalds@linux-foundation.org, mbligh@mbligh.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Andrew Morton wrote: > Somehow I don't believe that a person or organisation which is incapable of > preparing even a simple testcase will be capable of fixing problems such as > this without breaking things. I don't believe anybody who relies on one simple test case will ever be capable of evaluating a patch without breaking things. Test cases can show problems, but fixing a test case is no guarantee at all that your VM will behave ok with real world workloads. Test cases for the VM can *never* be relied on to show that a problem went away. I'll do my best, but I can't promise a simple test case for every single problem that's plaguing the VM. -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic. -- 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