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Fri, 12 Jul 2019 00:27:42 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6C0RWMH057569; Fri, 12 Jul 2019 00:27:42 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 2tnc8tu5x3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 12 Jul 2019 00:27:42 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x6C0Re3P001187; Fri, 12 Jul 2019 00:27:41 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 11 Jul 2019 17:27:40 -0700 To: Damien Le Moal From: "Martin K. Petersen" Organization: Oracle Corporation References: <20190701050918.27511-1-damien.lemoal@wdc.com> <20190701050918.27511-4-damien.lemoal@wdc.com> Date: Thu, 11 Jul 2019 20:27:37 -0400 In-Reply-To: <20190701050918.27511-4-damien.lemoal@wdc.com> (Damien Le Moal's message of "Mon, 1 Jul 2019 14:09:17 +0900") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.92 (gnu/linux) MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9315 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=793 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907120004 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9315 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=843 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907120003 X-Headers-End: 1hljPk-00G8BN-Pr Subject: Re: [f2fs-dev] [PATCH V6 3/4] sd_zbc: Fix report zones buffer allocation X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jens Axboe , "Martin K . Petersen" , Mike Snitzer , linux-f2fs-devel@lists.sourceforge.net, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-scsi@vger.kernel.org, Jaegeuk Kim , Christoph Hellwig , Bart Van Assche Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Damien, > During disk scan and revalidation done with sd_revalidate(), the zones > of a zoned disk are checked using the helper function > blk_revalidate_disk_zones() if a configuration change is detected > (change in the number of zones or zone size). The function > blk_revalidate_disk_zones() issues report_zones calls that are very > large, that is, to obtain zone information for all zones of the disk > with a single command. The size of the report zones command buffer > necessary for such large request generally is lower than the disk > max_hw_sectors and KMALLOC_MAX_SIZE (4MB) and succeeds on boot (no > memory fragmentation), but often fail at run time (e.g. hot-plug > event). This causes the disk revalidation to fail and the disk > capacity to be changed to 0. Probably easiest to funnel this through block with the rest of the series. Acked-by: Martin K. Petersen -- Martin K. Petersen Oracle Linux Engineering _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel