From: "Andi Kleen" Subject: Re: [PATCH v1 00/16] ext4: Add metadata checksumming Date: Sun, 4 Sep 2011 18:54:28 +0200 Message-ID: <6fdb58aed1dae8020900e65cbfb34b28.squirrel@www.firstfloor.org> References: <20110901003030.31048.99467.stgit@elm3c44.beaverton.ibm.com> <20110902182214.GC12086@tux1.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Cc: djwong@us.ibm.com, "Greg Freemyer" , "Andreas Dilger" , "Theodore Tso" , "Sunil Mushran" , "Amir Goldstein" , "linux-kernel" , "Andi Kleen" , "Mingming Cao" , "Joel Becker" , "linux-fsdevel" , linux-ext4@vger.kernel.org, "Coly Li" To: "Martin K. Petersen" Return-path: Received: from one.firstfloor.org ([213.235.205.2]:57413 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751664Ab1IDQye (ORCPT ); Sun, 4 Sep 2011 12:54:34 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: > On Westmere and beyond it is possible to accelerate generic CRC > calculation using the PCLMULQDQ operation. There are many of our CRC Faster than the lookup table? That's hard to believe. -Andi