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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT 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 4041BC169C4 for ; Fri, 8 Feb 2019 23:41:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07413218DA for ; Fri, 8 Feb 2019 23:41:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="vH4DuFYz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726222AbfBHXlv (ORCPT ); Fri, 8 Feb 2019 18:41:51 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:57592 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726211AbfBHXlv (ORCPT ); Fri, 8 Feb 2019 18:41:51 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x18NTP9b193235; Fri, 8 Feb 2019 23:41:49 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=corp-2018-07-02; bh=nVnFmOjqIgFP3HN3YoudkQfLbw0iH0KikauOa+//DhM=; b=vH4DuFYz2CTIqidceOCkQ/yigAa5EWiz6RWn3cky6Z/VEA0OXaieDh+OjOqZnD+BrCpO Oy4uqfaOSPCDrWjULrPw7P1IoreUZH9IJl/D9Ao6H2kknboDLi4ofXGmfLrCaGbJUPsZ Et+b98YUxjxGF01gof3grG80+vSkogtsLPgLqAgNHlearPu5YSAAcRIb8+3FNlCCOePJ okHgJsCl+j+aF+TaoXNTCBfeITB+JNPhE+4xQf1uemYdGqFTL5tINDhg6/ChH0grGb/C IqUWO3QB/IaqKrfWDhvSpfT6kI5zkwHRU0DXqYUa198wvoVcE/zG751mU+q3+kMt8NCe TQ== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2130.oracle.com with ESMTP id 2qd97ffajn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 08 Feb 2019 23:41:49 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x18NfmHR024501 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 8 Feb 2019 23:41:48 GMT Received: from abhmp0022.oracle.com (abhmp0022.oracle.com [141.146.116.28]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x18NfmYw023367; Fri, 8 Feb 2019 23:41:48 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 08 Feb 2019 23:41:48 +0000 From: "Martin K. Petersen" To: linux-scsi@vger.kernel.org Cc: "Martin K. Petersen" , stable@vger.kernel.org Subject: [PATCH] scsi: sd: Optimal I/O size should be a multiple of physical block size Date: Fri, 8 Feb 2019 18:41:47 -0500 Message-Id: <20190208234147.1316-1-martin.petersen@oracle.com> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9161 signatures=668683 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902080158 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org It was reported that some devices report an OPTIMAL TRANSFER LENGTH of 0xFFFF blocks. That looks bogus, especially for a device with a 4096-byte physical block size. Ignore OPTIMAL TRANSFER LENGTH if it is not a multiple of the device's reported physical block size. Cc: Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199759 Reported-by: Christoph Anton Mitterer Signed-off-by: Martin K. Petersen --- Before: NAME ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED RQ-SIZE RA WSAME sda 0 4096 33553920 4096 512 0 mq-deadline 256 128 32M After: NAME ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED RQ-SIZE RA WSAME sda 0 4096 0 4096 512 0 mq-deadline 256 4096 32M --- drivers/scsi/sd.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 9aa409b38765..d5ede5d65838 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3060,7 +3060,7 @@ static int sd_revalidate_disk(struct gendisk *disk) struct request_queue *q = sdkp->disk->queue; sector_t old_capacity = sdkp->capacity; unsigned char *buffer; - unsigned int dev_max, rw_max; + unsigned int dev_max, rw_max, opt_xfer_bytes; SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_revalidate_disk\n")); @@ -3119,13 +3119,16 @@ static int sd_revalidate_disk(struct gendisk *disk) /* * Determine the device's preferred I/O size for reads and writes - * unless the reported value is unreasonably small, large, or - * garbage. + * unless the reported value is unreasonably small, large, not a + * multiple of the physical block size, or simply garbage. */ + opt_xfer_bytes = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); + if (sdkp->opt_xfer_blocks && sdkp->opt_xfer_blocks <= dev_max && sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && - logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { + opt_xfer_bytes >= PAGE_SIZE && + (opt_xfer_bytes & (sdkp->physical_block_size - 1)) != 0) { q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); } else -- 2.19.2