diff options
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 54 |
1 files changed, 40 insertions, 14 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index a5aad8cad843..2d6f1a51359c 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -2865,7 +2865,8 @@ static void handle_stripe5(struct stripe_head *sh) md_done_sync(conf->mddev, STRIPE_SECTORS, 1); } - if (s.expanding && s.locked == 0) + if (s.expanding && s.locked == 0 && + !test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending)) handle_stripe_expansion(conf, sh, NULL); if (sh->ops.count) @@ -3067,7 +3068,8 @@ static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page) md_done_sync(conf->mddev, STRIPE_SECTORS, 1); } - if (s.expanding && s.locked == 0) + if (s.expanding && s.locked == 0 && + !test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending)) handle_stripe_expansion(conf, sh, &r6s); spin_unlock(&sh->lock); @@ -3157,7 +3159,8 @@ static void raid5_activate_delayed(raid5_conf_t *conf) atomic_inc(&conf->preread_active_stripes); list_add_tail(&sh->lru, &conf->handle_list); } - } + } else + blk_plug_device(conf->mddev->queue); } static void activate_bit_delay(raid5_conf_t *conf) @@ -3547,7 +3550,8 @@ static int make_request(struct request_queue *q, struct bio * bi) goto retry; } finish_wait(&conf->wait_for_overlap, &w); - handle_stripe(sh, NULL); + set_bit(STRIPE_HANDLE, &sh->state); + clear_bit(STRIPE_DELAYED, &sh->state); release_stripe(sh); } else { /* cannot get stripe for read-ahead, just give-up */ @@ -3696,6 +3700,25 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped release_stripe(sh); first_sector += STRIPE_SECTORS; } + /* If this takes us to the resync_max point where we have to pause, + * then we need to write out the superblock. + */ + sector_nr += conf->chunk_size>>9; + if (sector_nr >= mddev->resync_max) { + /* Cannot proceed until we've updated the superblock... */ + wait_event(conf->wait_for_overlap, + atomic_read(&conf->reshape_stripes) == 0); + mddev->reshape_position = conf->expand_progress; + set_bit(MD_CHANGE_DEVS, &mddev->flags); + md_wakeup_thread(mddev->thread); + wait_event(mddev->sb_wait, + !test_bit(MD_CHANGE_DEVS, &mddev->flags) + || kthread_should_stop()); + spin_lock_irq(&conf->device_lock); + conf->expand_lo = mddev->reshape_position; + spin_unlock_irq(&conf->device_lock); + wake_up(&conf->wait_for_overlap); + } return conf->chunk_size>>9; } @@ -3732,6 +3755,12 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) return reshape_request(mddev, sector_nr, skipped); + /* No need to check resync_max as we never do more than one + * stripe, and as resync_max will always be on a chunk boundary, + * if the check in md_do_sync didn't fire, there is no chance + * of overstepping resync_max here + */ + /* if there is too many failed drives and we are trying * to resync, then assert that we are finished, because there is * nothing we can do. @@ -3751,6 +3780,9 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski return sync_blocks * STRIPE_SECTORS; /* keep things rounded to whole stripes */ } + + bitmap_cond_end_sync(mddev->bitmap, sector_nr); + pd_idx = stripe_to_pdidx(sector_nr, conf, raid_disks); sh = get_active_stripe(conf, sector_nr, raid_disks, pd_idx, 1); if (sh == NULL) { @@ -3862,7 +3894,7 @@ static int retry_aligned_read(raid5_conf_t *conf, struct bio *raid_bio) * During the scan, completed stripes are saved for us by the interrupt * handler, so that they will not have to wait for our next wakeup. */ -static void raid5d (mddev_t *mddev) +static void raid5d(mddev_t *mddev) { struct stripe_head *sh; raid5_conf_t *conf = mddev_to_conf(mddev); @@ -3887,12 +3919,6 @@ static void raid5d (mddev_t *mddev) activate_bit_delay(conf); } - if (list_empty(&conf->handle_list) && - atomic_read(&conf->preread_active_stripes) < IO_THRESHOLD && - !blk_queue_plugged(mddev->queue) && - !list_empty(&conf->delayed_list)) - raid5_activate_delayed(conf); - while ((bio = remove_bio_from_retry(conf))) { int ok; spin_unlock_irq(&conf->device_lock); @@ -4106,7 +4132,7 @@ static int run(mddev_t *mddev) pr_debug("raid5: run(%s) called.\n", mdname(mddev)); - ITERATE_RDEV(mddev,rdev,tmp) { + rdev_for_each(rdev, tmp, mddev) { raid_disk = rdev->raid_disk; if (raid_disk >= conf->raid_disks || raid_disk < 0) @@ -4519,7 +4545,7 @@ static int raid5_start_reshape(mddev_t *mddev) if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) return -EBUSY; - ITERATE_RDEV(mddev, rdev, rtmp) + rdev_for_each(rdev, rtmp, mddev) if (rdev->raid_disk < 0 && !test_bit(Faulty, &rdev->flags)) spares++; @@ -4541,7 +4567,7 @@ static int raid5_start_reshape(mddev_t *mddev) /* Add some new drives, as many as will fit. * We know there are enough to make the newly sized array work. */ - ITERATE_RDEV(mddev, rdev, rtmp) + rdev_for_each(rdev, rtmp, mddev) if (rdev->raid_disk < 0 && !test_bit(Faulty, &rdev->flags)) { if (raid5_add_disk(mddev, rdev)) { |