From patchwork Sun Jan 8 14:47:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 9503477 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5FCAA60710 for ; Sun, 8 Jan 2017 14:47:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 36E9428339 for ; Sun, 8 Jan 2017 14:47:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2682727FAD; Sun, 8 Jan 2017 14:47:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C6A4027FAD for ; Sun, 8 Jan 2017 14:47:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934942AbdAHOrf (ORCPT ); Sun, 8 Jan 2017 09:47:35 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36782 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934897AbdAHOre (ORCPT ); Sun, 8 Jan 2017 09:47:34 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id v08EiPLL075320 for ; Sun, 8 Jan 2017 09:47:33 -0500 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 27uhna87nw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sun, 08 Jan 2017 09:47:33 -0500 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Sun, 8 Jan 2017 07:47:28 -0700 Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by d03dlp03.boulder.ibm.com (Postfix) with ESMTP id 9843019D8026; Sun, 8 Jan 2017 07:46:45 -0700 (MST) Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v08ElSVs10682866; Sun, 8 Jan 2017 07:47:28 -0700 Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2FD98BE039; Sun, 8 Jan 2017 07:47:28 -0700 (MST) Received: from localhost.in.ibm.com (unknown [9.85.83.50]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP id 90E1ABE038; Sun, 8 Jan 2017 07:47:21 -0700 (MST) From: Chandan Rajendra To: axboe@kernel.dk, jack@suse.cz Cc: Chandan Rajendra , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, anton@samba.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH] do_direct_IO: Use inode->i_blkbits to compute block count to be cleaned Date: Sun, 8 Jan 2017 20:17:10 +0530 X-Mailer: git-send-email 2.5.5 X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17010814-0008-0000-0000-000006820525 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006396; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000199; SDB=6.00804948; UDB=6.00391846; IPR=6.00582802; BA=6.00005033; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00013855; XFM=3.00000011; UTC=2017-01-08 14:47:30 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17010814-0009-0000-0000-00003E76F3B7 Message-Id: <1483886830-23878-1-git-send-email-chandan@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-01-08_12:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1701080224 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The code currently uses sdio->blkbits to compute the number of blocks to be cleaned. However sdio->blkbits is derived from the logical block size of the underlying block device (Refer to the definition of do_blockdev_direct_IO()). Due to this, generic/299 test would rarely fail when executed on an ext4 filesystem with 64k as the block size and when using a virtio based disk (having 512 byte as the logical block size) inside a kvm guest. This commit fixes the bug by using inode->i_blkbits to compute the number of blocks to be cleaned. Signed-off-by: Chandan Rajendra Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- fs/direct-io.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/direct-io.c b/fs/direct-io.c index aeae8c0..b20adf9 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -905,6 +905,7 @@ static inline void dio_zero_block(struct dio *dio, struct dio_submit *sdio, static int do_direct_IO(struct dio *dio, struct dio_submit *sdio, struct buffer_head *map_bh) { + const unsigned i_blkbits = dio->inode->i_blkbits; const unsigned blkbits = sdio->blkbits; int ret = 0; @@ -949,7 +950,7 @@ static int do_direct_IO(struct dio *dio, struct dio_submit *sdio, clean_bdev_aliases( map_bh->b_bdev, map_bh->b_blocknr, - map_bh->b_size >> blkbits); + map_bh->b_size >> i_blkbits); } if (!sdio->blkfactor)