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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 11A5BC433E0 for ; Wed, 3 Mar 2021 10:43:51 +0000 (UTC) Received: from userp2120.oracle.com (userp2120.oracle.com [156.151.31.85]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 578CA64EDF for ; Wed, 3 Mar 2021 10:43:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 578CA64EDF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=ocfs2-devel-bounces@oss.oracle.com Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 123Ada7U051222; Wed, 3 Mar 2021 10:43:49 GMT Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2120.oracle.com with ESMTP id 36yeqn2us0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 03 Mar 2021 10:43:49 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 123AebfV151911; Wed, 3 Mar 2021 10:43:49 GMT Received: from oss.oracle.com (oss-old-reserved.oracle.com [137.254.22.2]) by userp3020.oracle.com with ESMTP id 36yyut9jc3-1 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO); Wed, 03 Mar 2021 10:43:49 +0000 Received: from localhost ([127.0.0.1] helo=lb-oss.oracle.com) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1lHOyp-0002C6-M8; Wed, 03 Mar 2021 02:43:47 -0800 Received: from userp3020.oracle.com ([156.151.31.79]) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1lHOym-0002Bg-Ha for ocfs2-devel@oss.oracle.com; Wed, 03 Mar 2021 02:43:44 -0800 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 123AebCu151973 for ; Wed, 3 Mar 2021 10:43:44 GMT Received: from userp2030.oracle.com (userp2030.oracle.com [156.151.31.89]) by userp3020.oracle.com with ESMTP id 36yyut9j86-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 03 Mar 2021 10:43:44 +0000 Received: from pps.filterd (userp2030.oracle.com [127.0.0.1]) by userp2030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 123AhcAj029815 for ; Wed, 3 Mar 2021 10:43:43 GMT Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by userp2030.oracle.com with ESMTP id 36yc4jh059-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Wed, 03 Mar 2021 10:43:42 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 5C59368B02; Wed, 3 Mar 2021 11:43:37 +0100 (CET) Date: Wed, 3 Mar 2021 11:43:36 +0100 From: Christoph Hellwig To: "ruansy.fnst@fujitsu.com" Message-ID: <20210303104336.GA20371@lst.de> References: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-PDR: PASS X-Source-IP: 213.95.11.211 X-ServerName: verein.lst.de X-Proofpoint-SPF-Result: None X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9911 signatures=668683 X-Proofpoint-Spam-Details: rule=tap_notspam policy=tap score=0 bulkscore=0 adultscore=0 mlxlogscore=255 suspectscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 clxscore=176 spamscore=0 mlxscore=0 phishscore=0 priorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103030082 X-Spam: Clean Cc: "jack@suse.cz" , "linux-nvdimm@lists.01.org" , "darrick.wong@oracle.com" , "david@fromorbit.com" , "linux-kernel@vger.kernel.org" , "linux-xfs@vger.kernel.org" , "ocfs2-devel@oss.oracle.com" , "viro@zeniv.linux.org.uk" , "linux-fsdevel@vger.kernel.org" , "dan.j.williams@intel.com" , "linux-btrfs@vger.kernel.org" Subject: Re: [Ocfs2-devel] [PATCH v2 09/10] fs/xfs: Handle CoW for fsdax write() path X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: ocfs2-devel-bounces@oss.oracle.com Errors-To: ocfs2-devel-bounces@oss.oracle.com X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9911 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 spamscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103030082 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9911 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 clxscore=1034 priorityscore=1501 mlxlogscore=999 suspectscore=0 malwarescore=0 impostorscore=0 bulkscore=0 adultscore=0 mlxscore=0 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103030082 On Wed, Mar 03, 2021 at 09:57:48AM +0000, ruansy.fnst@fujitsu.com wrote: > > What is the advantage of the ioemap_end handler here? It adds another > > indirect funtion call to the fast path, so if we can avoid it, I'd > > rather do that. > > These code were in xfs_file_dax_write(). I moved them into the iomap_end > because the mmaped CoW need this. > > I know this is not so good, but I could not find another better way. Do you > have any ideas? mmaped copy is the copy_edge case? Maybe just use different iomap_ops for that case vs plain write? _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel