diff options
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 2cf23f23ddc..ffebc1e8f48 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -53,6 +53,8 @@ #include <linux/cpu.h> #include <linux/slab.h> #include <linux/ratelimit.h> +#include <trace/events/block.h> + #include "md.h" #include "raid5.h" #include "raid0.h" @@ -182,6 +184,8 @@ static void return_io(struct bio *return_bi) return_bi = bi->bi_next; bi->bi_next = NULL; bi->bi_size = 0; + trace_block_bio_complete(bdev_get_queue(bi->bi_bdev), + bi, 0); bio_endio(bi, 0); bi = return_bi; } @@ -671,6 +675,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s) bi->bi_next = NULL; if (rrdev) set_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags); + trace_block_bio_remap(bdev_get_queue(bi->bi_bdev), + bi, disk_devt(conf->mddev->gendisk), + sh->dev[i].sector); generic_make_request(bi); } if (rrdev) { @@ -698,6 +705,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s) rbi->bi_io_vec[0].bv_offset = 0; rbi->bi_size = STRIPE_SIZE; rbi->bi_next = NULL; + trace_block_bio_remap(bdev_get_queue(rbi->bi_bdev), + rbi, disk_devt(conf->mddev->gendisk), + sh->dev[i].sector); generic_make_request(rbi); } if (!rdev && !rrdev) { @@ -2855,8 +2865,10 @@ static void handle_stripe_dirtying(struct r5conf *conf, pr_debug("for sector %llu, rmw=%d rcw=%d\n", (unsigned long long)sh->sector, rmw, rcw); set_bit(STRIPE_HANDLE, &sh->state); - if (rmw < rcw && rmw > 0) + if (rmw < rcw && rmw > 0) { /* prefer read-modify-write, but need to get some data */ + blk_add_trace_msg(conf->mddev->queue, "raid5 rmw %llu %d", + (unsigned long long)sh->sector, rmw); for (i = disks; i--; ) { struct r5dev *dev = &sh->dev[i]; if ((dev->towrite || i == sh->pd_idx) && @@ -2867,7 +2879,7 @@ static void handle_stripe_dirtying(struct r5conf *conf, if ( test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) { pr_debug("Read_old block " - "%d for r-m-w\n", i); + "%d for r-m-w\n", i); set_bit(R5_LOCKED, &dev->flags); set_bit(R5_Wantread, &dev->flags); s->locked++; @@ -2877,8 +2889,10 @@ static void handle_stripe_dirtying(struct r5conf *conf, } } } + } if (rcw <= rmw && rcw > 0) { /* want reconstruct write, but need to get some data */ + int qread =0; rcw = 0; for (i = disks; i--; ) { struct r5dev *dev = &sh->dev[i]; @@ -2897,12 +2911,17 @@ static void handle_stripe_dirtying(struct r5conf *conf, set_bit(R5_LOCKED, &dev->flags); set_bit(R5_Wantread, &dev->flags); s->locked++; + qread++; } else { set_bit(STRIPE_DELAYED, &sh->state); set_bit(STRIPE_HANDLE, &sh->state); } } } + if (rcw) + blk_add_trace_msg(conf->mddev->queue, "raid5 rcw %llu %d %d %d", + (unsigned long long)sh->sector, + rcw, qread, test_bit(STRIPE_DELAYED, &sh->state)); } /* now if nothing is locked, and if we have enough data, * we can start a write request @@ -3900,6 +3919,8 @@ static void raid5_align_endio(struct bio *bi, int error) rdev_dec_pending(rdev, conf->mddev); if (!error && uptodate) { + trace_block_bio_complete(bdev_get_queue(raid_bi->bi_bdev), + raid_bi, 0); bio_endio(raid_bi, 0); if (atomic_dec_and_test(&conf->active_aligned_reads)) wake_up(&conf->wait_for_stripe); @@ -4004,6 +4025,9 @@ static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio) atomic_inc(&conf->active_aligned_reads); spin_unlock_irq(&conf->device_lock); + trace_block_bio_remap(bdev_get_queue(align_bi->bi_bdev), + align_bi, disk_devt(mddev->gendisk), + raid_bio->bi_sector); generic_make_request(align_bi); return 1; } else { @@ -4078,6 +4102,7 @@ static void raid5_unplug(struct blk_plug_cb *blk_cb, bool from_schedule) struct stripe_head *sh; struct mddev *mddev = cb->cb.data; struct r5conf *conf = mddev->private; + int cnt = 0; if (cb->list.next && !list_empty(&cb->list)) { spin_lock_irq(&conf->device_lock); @@ -4092,9 +4117,11 @@ static void raid5_unplug(struct blk_plug_cb *blk_cb, bool from_schedule) smp_mb__before_clear_bit(); clear_bit(STRIPE_ON_UNPLUG_LIST, &sh->state); __release_stripe(conf, sh); + cnt++; } spin_unlock_irq(&conf->device_lock); } + trace_block_unplug(mddev->queue, cnt, !from_schedule); kfree(cb); } @@ -4352,6 +4379,8 @@ static void make_request(struct mddev *mddev, struct bio * bi) if ( rw == WRITE ) md_write_end(mddev); + trace_block_bio_complete(bdev_get_queue(bi->bi_bdev), + bi, 0); bio_endio(bi, 0); } } @@ -4728,8 +4757,11 @@ static int retry_aligned_read(struct r5conf *conf, struct bio *raid_bio) handled++; } remaining = raid5_dec_bi_active_stripes(raid_bio); - if (remaining == 0) + if (remaining == 0) { + trace_block_bio_complete(bdev_get_queue(raid_bio->bi_bdev), + raid_bio, 0); bio_endio(raid_bio, 0); + } if (atomic_dec_and_test(&conf->active_aligned_reads)) wake_up(&conf->wait_for_stripe); return handled; |