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Tue, 9 Mar 2021 16:18:52 GMT Received: from userp2030.oracle.com (userp2030.oracle.com [156.151.31.89]) by aserp3020.oracle.com with ESMTP id 374kmyp1sn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 09 Mar 2021 16:18:52 +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 129FsFeJ032900 for ; Tue, 9 Mar 2021 16:18:52 GMT Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by userp2030.oracle.com with ESMTP id 373yskabqn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 09 Mar 2021 16:18:50 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id D8065AF0C; Tue, 9 Mar 2021 16:18:47 +0000 (UTC) Date: Tue, 9 Mar 2021 10:19:06 -0600 From: Goldwyn Rodrigues To: Shiyang Ruan Message-ID: <20210309161906.jjd7iw2y6hcst5c3@fiona> References: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> X-PDR: PASS X-Source-IP: 195.135.220.15 X-ServerName: mx2.suse.de X-Proofpoint-SPF-Result: pass X-Proofpoint-SPF-Record: v=spf1 mx ip4:195.135.221.0/24 ip4:195.135.220.0/24 ~all X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9918 signatures=668683 X-Proofpoint-Spam-Details: rule=tap_notspam policy=tap score=0 lowpriorityscore=0 impostorscore=0 phishscore=0 clxscore=180 priorityscore=213 spamscore=0 bulkscore=0 malwarescore=0 adultscore=0 mlxlogscore=648 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103090080 X-Spam: Clean Cc: jack@suse.cz, darrick.wong@oracle.com, linux-nvdimm@lists.01.org, 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 00/10] fsdax, xfs: Add reflink&dedupe support for fsdax 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=9918 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 adultscore=0 malwarescore=0 bulkscore=0 suspectscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103090081 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9918 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 clxscore=1034 phishscore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 lowpriorityscore=0 bulkscore=0 mlxscore=0 impostorscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103090081 Hi Shiang, Thanks for picking up this work. On 8:20 26/02, Shiyang Ruan wrote: > This patchset is attempt to add CoW support for fsdax, and take XFS, > which has both reflink and fsdax feature, as an example. How does this work for read sequence for two different files mapped to the same extent, both residing in DAX? If two different files read the same shared extent, which file would resultant page->mapping->host point to? This problem is listed as a TODO over dax_associate_entry() and is still not fixed. -- Goldwyn _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel