From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Ellerman Subject: Re: [PATCH] mm: kill kmemcheck Date: Thu, 12 Mar 2015 14:49:52 +1100 Message-ID: <1426132192.25936.7.camel@ellerman.id.au> References: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: Vladimir Davydov , Geert Uytterhoeven , "open list:SUPERH" , Catalin Marinas , Will Deacon , Jianyu Zhan , Paul Mackerras , Pavel Machek , Miklos Szeredi , Christoph Lameter , Marek Szyprowski , "open list:GENERIC INCLUDE/A..." , Andi Kleen , Russell King , Jingoo Han , James Morris , Chris Bainbridge , Antti Palosaari , Mel Gorman , Ritesh Harjani , Shaohua Li , Alexander Duyck , Wang Nan Return-path: In-Reply-To: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" List-Id: linux-crypto.vger.kernel.org T24gV2VkLCAyMDE1LTAzLTExIGF0IDA3OjQzIC0wNDAwLCBTYXNoYSBMZXZpbiB3cm90ZToKPiBB cyBkaXNjdXNzZWQgb24gTFNGL01NLCBraWxsIGttZW1jaGVjay4KPiAKPiBLQVNhbiBpcyBhIHJl cGxhY2VtZW50IHRoYXQgaXMgYWJsZSB0byB3b3JrIHdpdGhvdXQgdGhlIGxpbWl0YXRpb24gb2YK PiBrbWVtY2hlY2sgKHNpbmdsZSBDUFUsIHNsb3cpLiBLQVNhbiBpcyBhbHJlYWR5IHVwc3RyZWFt Lgo+IAo+IFdlIGFyZSBhbHNvIG5vdCBhd2FyZSBvZiBhbnkgdXNlcnMgb2Yga21lbWNoZWNrIChv ciB1c2VycyB3aG8gZG9uJ3QgY29uc2lkZXIKPiBLQVNhbiBhcyBhIHN1aXRhYmxlIHJlcGxhY2Vt ZW50KS4KCkZyb20gRG9jdW1lbnRhdGlvbi9rYXNhbi50eHQ6CgogICAgdGhlcmVmb3JlIHlvdSB3 aWxsIG5lZWQgYSBjZXJ0YWluIHZlcnNpb24gb2YgR0NDID4gNC45LjIKCkFGQUlLIGdjYyA0Ljku MyBoYXNuJ3QgYmVlbiByZWxlYXNlZCB5ZXQuIChPciBkb2VzIGl0IG1lYW4gPj0gNC45LjIgPykK CkNhbiB3ZSBwZXJoYXBzIHdhaXQgdW50aWwgdGhlcmUgaXMgYSByZWxlYXNlZCB2ZXJzaW9uIG9m IEdDQyB0aGF0IHN1cHBvcnRzCktBU2FuPyBBbmQgbWF5YmUgdGhlbiBhIHRvdWNoIGxvbmdlciBz byBmb2xrcyBjYW4gdGVzdCBpdCB3b3JrcyBvbiB0aGVpcgpwbGF0Zm9ybXM/CgpjaGVlcnMKCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eHBwYy1k ZXYgbWFpbGluZyBsaXN0CkxpbnV4cHBjLWRldkBsaXN0cy5vemxhYnMub3JnCmh0dHBzOi8vbGlz dHMub3psYWJzLm9yZy9saXN0aW5mby9saW51eHBwYy1kZXY= From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Ellerman Subject: Re: [PATCH] mm: kill kmemcheck Date: Thu, 12 Mar 2015 14:49:52 +1100 Message-ID: <1426132192.25936.7.camel@ellerman.id.au> References: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; 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Thu, 12 Mar 2015 14:49:53 +1100 (AEDT) Message-ID: <1426132192.25936.7.camel@ellerman.id.au> Subject: Re: [PATCH] mm: kill kmemcheck From: Michael Ellerman To: Sasha Levin Date: Thu, 12 Mar 2015 14:49:52 +1100 In-Reply-To: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> References: <1426074547-21888-1-git-send-email-sasha.levin@oracle.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: Vladimir Davydov , Geert Uytterhoeven , "open list:SUPERH" , Catalin Marinas , Will Deacon , Jianyu Zhan , Paul Mackerras , Pavel Machek , Miklos Szeredi , Christoph Lameter , Marek Szyprowski , "open list:GENERIC INCLUDE/A..." , Andi Kleen , Russell King , Jingoo Han , James Morris , Chris Bainbridge , Antti Palosaari , Mel Gorman , Ritesh Harjani , Shaohua Li , Alexander Duyck , Wang Nan , Jiri Pirko , Daniel J Blueman , Rusty Russell , Jens Axboe , Alexander Viro , Thomas Gleixner , Konstantin Khlebnikov , Willem de Bruijn , Greg Kroah-Hartman , Randy Dunlap , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Rabin Vincent , "Aneesh Kumar K.V" , Jiri Kosina , Tejun Heo , Andrew Morton , Patrick McHardy , Christoffer Dall , Mark Rutland , "open list:DOCUMENTATION" , Dave Hansen , Eric Dumazet , Jungseung Lee , Masami Hiramatsu , Stephen Rothwell , Qiaowei Ren , Prarit Bhargava , bob picco , Sungjinn Chung , Quentin Lambert , Hugh Dickins , Yasuaki Ishimatsu , Kukjin Kim , Pranith Kumar , Tom Herbert , "open list:CRYPTO API" , Rik van Riel , Johannes Berg , Mauro Carvalho Chehab , Eyal Perry , Joe Perches , chishanmingshen , Cyrill Gorcunov , Boris Ostrovsky , Yinghai Lu , Steven Honeyman , "moderated list:ARM PORT" , Theodore Ts'o , Pekka Enberg , David Vrabel , David Rientjes , Joonsoo Kim , Michal Hocko , Paul Gortmaker , Jan Beulich , "moderated list:OPENRISC ARCHITEC..." , Guan Xuetao , Sam Ravnborg , Jonathan Corbet , Andrey Ryabinin , Dexuan Cui , Suresh Siddha , Alexey Kuznetsov , "Paul E. McKenney" , Fenghua Yu , Kees Cook , Arnd Bergmann , Vegard Nossum , Josh Triplett , Steven Rostedt , Borislav Petkov , Andrey Konovalov , Scott Wood , Bryan O'Donoghue , Dan Streetman , Oleg Nesterov , Andy Lutomirski , Hannes Frederic Sowa , linux-fsdevel@vger.kernel.org, "David S. Miller" , "Kirill A. Shutemov" , "Michael S. Tsirkin" , Peter Zijlstra , "open list:MEMORY MANAGEMENT" , Davidlohr Bueso , Paul Cassella , "H. Peter Anvin" , "open list:SPARC + UltraSPAR..." , Xishi Qiu , Alexei Starovoitov , Jonas Bonn , Herbert Xu , Richard Weinberger , "maintainer:X86 ARCHITECTURE..." , Ingo Molnar , Aaron Tomlin , Greg Thelen , "Eric W. Biederman" , Konrad Rzeszutek Wilk , Fabian Frederick , Michal Marek , Jungseok Lee , Dave Jones , Andy Shevchenko , Vlastimil Babka , Juergen Gross , Hideaki YOSHIFUJI , "open list:NETWORKING \[GENERAL\]" , Daniel Borkmann , Horia Geanta , Johannes Weiner , "open list:LINUX FOR POWERPC..." , Anton Blanchard List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, 2015-03-11 at 07:43 -0400, Sasha Levin wrote: > As discussed on LSF/MM, kill kmemcheck. > > KASan is a replacement that is able to work without the limitation of > kmemcheck (single CPU, slow). KASan is already upstream. > > We are also not aware of any users of kmemcheck (or users who don't consider > KASan as a suitable replacement). >>From Documentation/kasan.txt: therefore you will need a certain version of GCC > 4.9.2 AFAIK gcc 4.9.3 hasn't been released yet. (Or does it mean >= 4.9.2 ?) Can we perhaps wait until there is a released version of GCC that supports KASan? And maybe then a touch longer so folks can test it works on their platforms? cheers