From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f171.google.com (mail-ie0-f171.google.com [209.85.223.171]) by kanga.kvack.org (Postfix) with ESMTP id 38372900049 for ; Wed, 11 Mar 2015 10:26:40 -0400 (EDT) Received: by iecsl2 with SMTP id sl2so30639612iec.1 for ; Wed, 11 Mar 2015 07:26:40 -0700 (PDT) Received: from smtprelay.hostedemail.com (smtprelay0254.hostedemail.com. [216.40.44.254]) by mx.google.com with ESMTP id f17si4011811ich.32.2015.03.11.07.26.39 for ; Wed, 11 Mar 2015 07:26:39 -0700 (PDT) Date: Wed, 11 Mar 2015 10:26:36 -0400 From: Steven Rostedt Subject: Re: [PATCH] mm: kill kmemcheck Message-ID: <20150311102636.6b4110a8@gandalf.local.home> In-Reply-To: <55004595.7020304@oracle.com> References: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> <20150311081909.552e2052@grimm.local.home> <55003666.3020100@oracle.com> <20150311084034.04ce6801@grimm.local.home> <55004595.7020304@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: LKML , linux-mm@kvack.org, netdev@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-crypto@vger.kernel.org On Wed, 11 Mar 2015 09:39:33 -0400 Sasha Levin wrote: > On 03/11/2015 08:40 AM, Steven Rostedt wrote: > > On Wed, 11 Mar 2015 08:34:46 -0400 > > Sasha Levin wrote: > > > >> > Fair enough. We knew there are existing kmemcheck users, but KASan should be > >> > superior both in performance and the scope of bugs it finds. It also shouldn't > >> > impose new limitations beyond requiring gcc 4.9.2+. > >> > > > Ouch! OK, then I can't use it. I'm currently compiling with gcc 4.6.3. > > > > It will be a while before I upgrade my build farm to something newer. > > Are you actually compiling new kernels with 4.6.3, or are you using older > kernels as well? Yes for both :-) > > There's no real hurry to kill kmemcheck right now, but we do want to stop > supporting that in favour of KASan. Understood, but the kernel is suppose to support older compilers. Perhaps we can keep kmemcheck for now and say it's obsoleted if you have a newer compiler. Because it will be a while before I upgrade my compilers. I don't upgrade unless I have a good reason to do so. Not sure KASan fulfills that requirement. -- Steve -- 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