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,USER_AGENT_GIT autolearn=unavailable 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 AFA48C282CE for ; Wed, 13 Feb 2019 09:53:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7D661222CD for ; Wed, 13 Feb 2019 09:53:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="DBEDCLXM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387599AbfBMJxq (ORCPT ); Wed, 13 Feb 2019 04:53:46 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:53302 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387821AbfBMJxp (ORCPT ); Wed, 13 Feb 2019 04:53:45 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x1D9mi8e163835; Wed, 13 Feb 2019 09:53:39 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=djq8BbFMatF5YBAugCJjJvi0D9KcFtTqCJonR8JZfsA=; b=DBEDCLXMe4fSmDntnCJNF8b5JT2JIGK9LXq9nKSxRZmSbgm/AMhuceh8GFffJ4U+oNAn wxgkmAMmw1xhl+CaegZH7v9LFAtDWg5P5Yx7188Z62hvrSmY9Ko1CWjL/bI7V9qRtQ34 QKDQo0h1jNVR137jFtHaa6PLyKnsb0k6saFxgYdtbrl4Izt5eWZcuUForZ49juqrSlmv LFNSkFSdqk44B1ZcvdyiaC1JjoeqTOVRCskGV4EMcskj9sDWPmOpvpUV826T49WKm6fD 6vDvTQvF2qRPqpEifX2yeS+V932yyqfFLpRued61f4UYYHfyvdx+c5bB2UunKv+/5ZHL Xw== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2qhree11sq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Feb 2019 09:53:39 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x1D9rbnT021083 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Feb 2019 09:53:38 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x1D9rbGh000718; Wed, 13 Feb 2019 09:53:37 GMT Received: from localhost.localdomain (/116.239.187.160) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 13 Feb 2019 09:53:36 +0000 From: Bob Liu To: linux-block@vger.kernel.org Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, martin.petersen@oracle.com, shirley.ma@oracle.com, allison.henderson@oracle.com, david@fromorbit.com, darrick.wong@oracle.com, hch@infradead.org, adilger@dilger.ca Subject: [RFC PATCH v2 6/9] xfs: Add b_rd_hint to xfs_buf Date: Wed, 13 Feb 2019 17:50:41 +0800 Message-Id: <20190213095044.29628-7-bob.liu@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190213095044.29628-1-bob.liu@oracle.com> References: <20190213095044.29628-1-bob.liu@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9165 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=988 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902130072 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Allison Henderson This patch adds a new field b_rd_hint to xfs_buf. We will need this to properly initialize the new bio->bi_rw_hint when submitting the read request. Signed-off-by: Allison Henderson --- fs/xfs/xfs_buf.c | 6 +++++- fs/xfs/xfs_buf.h | 12 ++++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index e2683c8e868c..6098195ecaf4 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1338,8 +1338,11 @@ xfs_buf_bio_end_io( if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ)) invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp)); - if (atomic_dec_and_test(&bp->b_io_remaining) == 1) + if (atomic_dec_and_test(&bp->b_io_remaining) == 1) { + if (bp->b_flags & XBF_RW_HINT) + bitmap_copy(bp->b_rd_hint, bio->bi_rd_hint, BLKDEV_MAX_MIRRORS); xfs_buf_ioend_async(bp); + } bio_put(bio); } @@ -1385,6 +1388,7 @@ xfs_buf_ioapply_map( bio->bi_iter.bi_sector = sector; bio->bi_end_io = xfs_buf_bio_end_io; bio->bi_private = bp; + bitmap_copy(bio->bi_rd_hint, bp->b_rd_hint, BLKDEV_MAX_MIRRORS); bio_set_op_attrs(bio, op, op_flags); for (; size && nr_pages; nr_pages--, page_index++) { diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 989b97a17486..af9bdff29e66 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -40,6 +40,7 @@ typedef enum { #define XBF_SYNCIO (1 << 10)/* treat this buffer as synchronous I/O */ #define XBF_FUA (1 << 11)/* force cache write through mode */ #define XBF_FLUSH (1 << 12)/* flush the disk cache before a write */ +#define XBF_RW_HINT (1 << 13)/* Read/write hint used for alt dev retry */ /* flags used only as arguments to access routines */ #define XBF_TRYLOCK (1 << 16)/* lock requested, but do not wait */ @@ -65,6 +66,7 @@ typedef unsigned int xfs_buf_flags_t; { XBF_SYNCIO, "SYNCIO" }, \ { XBF_FUA, "FUA" }, \ { XBF_FLUSH, "FLUSH" }, \ + { XBF_RW_HINT, "RW_HINT" }, \ { XBF_TRYLOCK, "TRYLOCK" }, /* should never be set */\ { XBF_UNMAPPED, "UNMAPPED" }, /* ditto */\ { _XBF_PAGES, "PAGES" }, \ @@ -197,6 +199,16 @@ typedef struct xfs_buf { unsigned long b_first_retry_time; /* in jiffies */ int b_last_error; + /* + * Bitmask used by block device for alternate device retry + * + * To retry a read with the next device, resubmit the bio with + * the bi_rd_hint returned from the last read. + * Otherwise use bitmap_zero() if we don't care about alt mirror + * device retry. + */ + DECLARE_BITMAP(b_rd_hint, BLKDEV_MAX_MIRRORS); + const struct xfs_buf_ops *b_ops; bool b_alt_retry; /* toggle alt device retry */ } xfs_buf_t; -- 2.17.1