From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, T_DKIMWL_WL_HIGH,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DDB2C433F5 for ; Fri, 24 Aug 2018 16:30:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 287552151C for ; Fri, 24 Aug 2018 16:30:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="qud6bCse" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 287552151C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727835AbeHXUGO (ORCPT ); Fri, 24 Aug 2018 16:06:14 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:59184 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726407AbeHXUGO (ORCPT ); Fri, 24 Aug 2018 16:06:14 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7OGSr07129884; Fri, 24 Aug 2018 16:30:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=to : cc : subject : from : references : date : in-reply-to : message-id : mime-version : content-type; s=corp-2018-07-02; bh=jxotf2JkHuLvWK4o9UcXfdNRuhuZeJQTyYq11rL0F7Y=; b=qud6bCseMNgqD9PzUvj7x84vZef48jTrigvgsz7kJJ2CL7gN9Ltri7EtGnJDWFk5YZFj FTeC5QE0O4icEWQPK4H0YgBU5kigaJ0BrwTXCVi8I1nTms0/TECUUhR8JXZAFJYFUjad DhUBN5NPDN5B5D1MtbKNzJgHOEURpfwfYXOGREbwpwkFNWIfm/84SHRxyFHLiyjCSjEn BKKxdyR5PEEYhwTKccQI6xbSdBD6TqeQXTvBKb4CSrLhs2/4DlBfaJDKpFd/MewZlRjd MFCbVrXLI1psQk9S2UpwmJsMqiWgP/gIOerEZKcgyZ3M43k45nS+/o2cv/IoJsYQO0rI tA== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2kxavu98dd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 24 Aug 2018 16:30:33 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w7OGUWNs011530 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 24 Aug 2018 16:30:32 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7OGUWA9002438; Fri, 24 Aug 2018 16:30:32 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 24 Aug 2018 09:30:31 -0700 To: Jeffrey Lien Cc: Christoph Hellwig , "Martin K. Petersen" , "linux-kernel\@vger.kernel.org" , "linux-crypto\@vger.kernel.org" , "linux-block\@vger.kernel.org" , "linux-scsi\@vger.kernel.org" , "herbert\@gondor.apana.org.au" , "tim.c.chen\@linux.intel.com" , David Darrington , Jeff Furlong Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. From: "Martin K. Petersen" Organization: Oracle Corporation References: <1533928331-21303-1-git-send-email-jeff.lien@wdc.com> <20180822062016.GA10356@infradead.org> Date: Fri, 24 Aug 2018 12:30:29 -0400 In-Reply-To: (Jeffrey Lien's message of "Fri, 24 Aug 2018 15:32:52 +0000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8995 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=651 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808240173 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jeffrey, > So it seems the CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y provides the best > performance. Thanks for confirming! > Are there any negative side effect to this config option? Other than kernel image size, not really. -- Martin K. Petersen Oracle Linux Engineering