From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id B9EFB6B00AC for ; Sat, 30 May 2009 04:01:28 -0400 (EDT) Message-ID: <4A20E6CF.8070003@cs.helsinki.fi> Date: Sat, 30 May 2009 10:57:03 +0300 From: Pekka Enberg MIME-Version: 1.0 Subject: Re: [patch 0/5] Support for sanitization flag in low-level page allocator References: <4A15A8C7.2030505@redhat.com> <20090522073436.GA3612@elte.hu> <20090522113809.GB13971@oblivion.subreption.com> <20090523124944.GA23042@elte.hu> <4A187BDE.5070601@redhat.com> <20090527223421.GA9503@elte.hu> <20090528072702.796622b6@lxorguk.ukuu.org.uk> <20090528090836.GB6715@elte.hu> <20090528125042.28c2676f@lxorguk.ukuu.org.uk> <84144f020905300035g1d5461f9n9863d4dcdb6adac0@mail.gmail.com> <20090530075033.GL29711@oblivion.subreption.com> In-Reply-To: <20090530075033.GL29711@oblivion.subreption.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: "Larry H." Cc: Alan Cox , Ingo Molnar , Rik van Riel , linux-kernel@vger.kernel.org, Linus Torvalds , linux-mm@kvack.org, Ingo Molnar , pageexec@freemail.hu, Linus Torvalds List-ID: Larry H. wrote: > Furthermore, selective clearing doesn't solve the roots of the problem. > It's just adding bandages to a wound which never stops bleeding. I > proposed an initial page flag because we could use it later for > unconditional page clearing doing a one line change in a header file. > > I see a lot of speculation on what works and what doesn't, but > there isn't much on the practical side of things, yet. I provided test > results that proved some of the comments wrong, and I've referenced > literature which shows the reasoning behind all this. What else can I do > to make you understand you are missing the point here? Hey, if you want to add a CONFIG_ZERO_ALL_MEMORY_PARANOIA thing that can be disabled, go for it! But you have to find someone else to take the merge the SLAB bits because, quite frankly, I am not convinced it's worth it. And the hand waving you're doing here isn't really helping your case, sorry. Pekka -- 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