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From: Ming Lei <tom.leiming@gmail.com>
To: Shaohua Li <shli@kernel.org>, Jens Axboe <axboe@fb.com>,
	linux-raid@vger.kernel.org, linux-block@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <tom.leiming@gmail.com>
Subject: [PATCH v3 14/14] md: raid10: avoid direct access to bvec table in handle_reshape_read_error
Date: Fri, 17 Mar 2017 00:12:35 +0800	[thread overview]
Message-ID: <20170316161235.27110-15-tom.leiming@gmail.com> (raw)
In-Reply-To: <20170316161235.27110-1-tom.leiming@gmail.com>

All reshape I/O share pages from 1st copy device, so just use that pages
for avoiding direct access to bvec table in handle_reshape_read_error.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 drivers/md/raid10.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 8db3b0869be4..67cf09c0c649 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4681,7 +4681,10 @@ static int handle_reshape_read_error(struct mddev *mddev,
 	struct r10bio *r10b = &on_stack.r10_bio;
 	int slot = 0;
 	int idx = 0;
-	struct bio_vec *bvec = r10_bio->master_bio->bi_io_vec;
+	struct page **pages;
+
+	/* reshape IOs share pages from .devs[0].bio */
+	pages = get_resync_pages(r10_bio->devs[0].bio)->pages;
 
 	r10b->sector = r10_bio->sector;
 	__raid10_find_phys(&conf->prev, r10b);
@@ -4710,7 +4713,7 @@ static int handle_reshape_read_error(struct mddev *mddev,
 			success = sync_page_io(rdev,
 					       addr,
 					       s << 9,
-					       bvec[idx].bv_page,
+					       pages[idx],
 					       REQ_OP_READ, 0, false);
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
-- 
2.9.3


      parent reply	other threads:[~2017-03-16 16:12 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-16 16:12 [PATCH v3 00/14] md: cleanup on direct access to bvec table Ming Lei
2017-03-16 16:12 ` [PATCH v3 01/14] md: raid1/raid10: don't handle failure of bio_add_page() Ming Lei
2017-03-27  9:14   ` Christoph Hellwig
2017-03-16 16:12 ` [PATCH v3 02/14] md: move two macros into md.h Ming Lei
2017-03-24  5:57   ` NeilBrown
2017-03-24  5:57     ` NeilBrown
2017-03-24  6:30     ` Ming Lei
2017-03-24 16:53     ` Shaohua Li
2017-03-27  9:15       ` Christoph Hellwig
2017-03-27  9:52         ` NeilBrown
2017-03-27  9:52           ` NeilBrown
2017-03-16 16:12 ` [PATCH v3 03/14] md: prepare for managing resync I/O pages in clean way Ming Lei
2017-03-24  6:00   ` NeilBrown
2017-03-24  6:00     ` NeilBrown
2017-03-16 16:12 ` [PATCH v3 04/14] md: raid1: simplify r1buf_pool_free() Ming Lei
2017-03-16 16:12 ` [PATCH v3 05/14] md: raid1: don't use bio's vec table to manage resync pages Ming Lei
2017-07-09 23:09   ` NeilBrown
2017-07-09 23:09     ` NeilBrown
2017-07-10  3:35     ` Ming Lei
2017-07-10  4:13       ` Ming Lei
2017-07-10  4:38         ` NeilBrown
2017-07-10  4:38           ` NeilBrown
2017-07-10  7:25           ` Ming Lei
2017-07-10  7:25             ` Ming Lei
2017-07-10 19:05             ` Shaohua Li
2017-07-10 22:54               ` Ming Lei
2017-07-10 23:14               ` NeilBrown
2017-07-10 23:14                 ` NeilBrown
2017-07-12  1:40                 ` Ming Lei
2017-07-12 16:30                   ` Shaohua Li
2017-07-13  1:22                     ` Ming Lei
2017-03-16 16:12 ` [PATCH v3 06/14] md: raid1: retrieve page from pre-allocated resync page array Ming Lei
2017-03-16 16:12 ` [PATCH v3 07/14] md: raid1: use bio helper in process_checks() Ming Lei
2017-03-16 16:12 ` [PATCH v3 08/14] block: introduce bio_copy_data_partial Ming Lei
2017-03-24  5:34   ` Shaohua Li
2017-03-24  5:34     ` Shaohua Li
2017-03-24 16:41   ` Jens Axboe
2017-03-24 16:41     ` Jens Axboe
2017-03-16 16:12 ` [PATCH v3 09/14] md: raid1: move 'offset' out of loop Ming Lei
2017-03-16 16:12 ` [PATCH v3 10/14] md: raid1: improve write behind Ming Lei
2017-03-16 16:12 ` [PATCH v3 11/14] md: raid10: refactor code of read reshape's .bi_end_io Ming Lei
2017-03-16 16:12 ` [PATCH v3 12/14] md: raid10: don't use bio's vec table to manage resync pages Ming Lei
2017-03-16 16:12 ` [PATCH v3 13/14] md: raid10: retrieve page from preallocated resync page array Ming Lei
2017-03-16 16:12 ` Ming Lei [this message]

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