From 7eaceaccab5f40bbfda044629a6298616aeaed50 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 10 Mar 2011 08:52:07 +0100 Subject: block: remove per-queue plugging Code has been converted over to the new explicit on-stack plugging, and delay users have been converted to use the new API for that. So lets kill off the old plugging along with aops->sync_page(). Signed-off-by: Jens Axboe --- drivers/md/raid5.c | 62 +++++++----------------------------------------------- 1 file changed, 8 insertions(+), 54 deletions(-) (limited to 'drivers/md/raid5.c') diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 702812824195..e867ee42b152 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -433,8 +433,6 @@ static int has_failed(raid5_conf_t *conf) return 0; } -static void unplug_slaves(mddev_t *mddev); - static struct stripe_head * get_active_stripe(raid5_conf_t *conf, sector_t sector, int previous, int noblock, int noquiesce) @@ -463,8 +461,7 @@ get_active_stripe(raid5_conf_t *conf, sector_t sector, < (conf->max_nr_stripes *3/4) || !conf->inactive_blocked), conf->device_lock, - md_raid5_unplug_device(conf) - ); + md_raid5_kick_device(conf)); conf->inactive_blocked = 0; } else init_stripe(sh, sector, previous); @@ -1473,8 +1470,7 @@ static int resize_stripes(raid5_conf_t *conf, int newsize) wait_event_lock_irq(conf->wait_for_stripe, !list_empty(&conf->inactive_list), conf->device_lock, - unplug_slaves(conf->mddev) - ); + blk_flush_plug(current)); osh = get_free_stripe(conf); spin_unlock_irq(&conf->device_lock); atomic_set(&nsh->count, 1); @@ -3645,58 +3641,19 @@ static void activate_bit_delay(raid5_conf_t *conf) } } -static void unplug_slaves(mddev_t *mddev) +void md_raid5_kick_device(raid5_conf_t *conf) { - raid5_conf_t *conf = mddev->private; - int i; - int devs = max(conf->raid_disks, conf->previous_raid_disks); - - rcu_read_lock(); - for (i = 0; i < devs; i++) { - mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev); - if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) { - struct request_queue *r_queue = bdev_get_queue(rdev->bdev); - - atomic_inc(&rdev->nr_pending); - rcu_read_unlock(); - - blk_unplug(r_queue); - - rdev_dec_pending(rdev, mddev); - rcu_read_lock(); - } - } - rcu_read_unlock(); -} - -void md_raid5_unplug_device(raid5_conf_t *conf) -{ - unsigned long flags; - - spin_lock_irqsave(&conf->device_lock, flags); - - if (plugger_remove_plug(&conf->plug)) { - conf->seq_flush++; - raid5_activate_delayed(conf); - } + blk_flush_plug(current); + raid5_activate_delayed(conf); md_wakeup_thread(conf->mddev->thread); - - spin_unlock_irqrestore(&conf->device_lock, flags); - - unplug_slaves(conf->mddev); } -EXPORT_SYMBOL_GPL(md_raid5_unplug_device); +EXPORT_SYMBOL_GPL(md_raid5_kick_device); static void raid5_unplug(struct plug_handle *plug) { raid5_conf_t *conf = container_of(plug, raid5_conf_t, plug); - md_raid5_unplug_device(conf); -} -static void raid5_unplug_queue(struct request_queue *q) -{ - mddev_t *mddev = q->queuedata; - md_raid5_unplug_device(mddev->private); + md_raid5_kick_device(conf); } int md_raid5_congested(mddev_t *mddev, int bits) @@ -4100,7 +4057,7 @@ static int make_request(mddev_t *mddev, struct bio * bi) * add failed due to overlap. Flush everything * and wait a while */ - md_raid5_unplug_device(conf); + md_raid5_kick_device(conf); release_stripe(sh); schedule(); goto retry; @@ -4365,7 +4322,6 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski if (sector_nr >= max_sector) { /* just being told to finish up .. nothing much to do */ - unplug_slaves(mddev); if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { end_reshape(conf); @@ -4569,7 +4525,6 @@ static void raid5d(mddev_t *mddev) spin_unlock_irq(&conf->device_lock); async_tx_issue_pending_all(); - unplug_slaves(mddev); pr_debug("--- raid5d inactive\n"); } @@ -5205,7 +5160,6 @@ static int run(mddev_t *mddev) mddev->queue->backing_dev_info.congested_data = mddev; mddev->queue->backing_dev_info.congested_fn = raid5_congested; mddev->queue->queue_lock = &conf->device_lock; - mddev->queue->unplug_fn = raid5_unplug_queue; chunk_size = mddev->chunk_sectors << 9; blk_queue_io_min(mddev->queue, chunk_size); -- cgit v1.2.3