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Date: Mon, 18 Sep 2017 00:40:35 +0000 From: "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org> Cc: Shaohua Li <shli@...com>, NeilBrown <neilb@...e.com>, "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> Subject: [PATCH for 4.9 32/39] md/raid10: submit bio directly to replacement disk From: Shaohua Li <shli@...com> [ Upstream commit 6d399783e9d4e9bd44931501948059d24ad96ff8 ] Commit 57c67df(md/raid10: submit IO from originating thread instead of md thread) submits bio directly for normal disks but not for replacement disks. There is no point we shouldn't do this for replacement disks. Cc: NeilBrown <neilb@...e.com> Signed-off-by: Shaohua Li <shli@...com> Signed-off-by: Sasha Levin <alexander.levin@...izon.com> --- drivers/md/raid10.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 4c4aab02e311..b19b551bb34b 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1407,11 +1407,24 @@ static void __make_request(struct mddev *mddev, struct bio *bio) mbio->bi_private = r10_bio; atomic_inc(&r10_bio->remaining); + + cb = blk_check_plugged(raid10_unplug, mddev, + sizeof(*plug)); + if (cb) + plug = container_of(cb, struct raid10_plug_cb, + cb); + else + plug = NULL; spin_lock_irqsave(&conf->device_lock, flags); - bio_list_add(&conf->pending_bio_list, mbio); - conf->pending_count++; + if (plug) { + bio_list_add(&plug->pending, mbio); + plug->pending_cnt++; + } else { + bio_list_add(&conf->pending_bio_list, mbio); + conf->pending_count++; + } spin_unlock_irqrestore(&conf->device_lock, flags); - if (!mddev_check_plugged(mddev)) + if (!plug) md_wakeup_thread(mddev->thread); } } -- 2.11.0
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