From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f47.google.com (mail-wm0-f47.google.com [74.125.82.47]) by kanga.kvack.org (Postfix) with ESMTP id 8B6846B0253 for ; Tue, 15 Dec 2015 13:39:32 -0500 (EST) Received: by mail-wm0-f47.google.com with SMTP id n186so178196604wmn.1 for ; Tue, 15 Dec 2015 10:39:32 -0800 (PST) Received: from mail.skyhub.de (mail.skyhub.de. [2a01:4f8:120:8448::d00d]) by mx.google.com with ESMTP id k185si4923163wmf.19.2015.12.15.10.39.31 for ; Tue, 15 Dec 2015 10:39:31 -0800 (PST) Date: Tue, 15 Dec 2015 19:39:24 +0100 From: Borislav Petkov Subject: Re: [PATCHV2 3/3] x86, ras: Add mcsafe_memcpy() function to recover from machine checks Message-ID: <20151215183924.GJ25973@pd.tnic> References: <23b2515da9d06b198044ad83ca0a15ba38c24e6e.1449861203.git.tony.luck@intel.com> <20151215131135.GE25973@pd.tnic> <3908561D78D1C84285E8C5FCA982C28F39F8566E@ORSMSX114.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Dan Williams Cc: "Luck, Tony" , Ingo Molnar , Andrew Morton , Andy Lutomirski , "linux-kernel@vger.kernel.org" , Linux MM , linux-nvdimm , X86 ML On Tue, Dec 15, 2015 at 10:35:49AM -0800, Dan Williams wrote: > Correction we have MOVNTDQA, but that requires saving the fpu state > and marking the memory as WC, i.e. probably not worth it. Not really. Last time I tried an SSE3 memcpy in the kernel like glibc does, it wasn't worth it. The enhanced REP; MOVSB is hands down faster. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- 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