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| author | shli@kernel.org <shli@kernel.org> | 2014-12-15 12:57:04 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2015-04-22 08:00:41 +1000 |
| commit | dabc4ec6ba72418ebca6bf1884f344bba40c8709 (patch) | |
| tree | 7860792d9a7b5043c043eea983d218591bbe06f5 /drivers/md | |
| parent | 72ac733015bbdc0356ba3e92c52137a265910a91 (diff) | |
| download | linux-dabc4ec6ba72418ebca6bf1884f344bba40c8709.tar.gz linux-dabc4ec6ba72418ebca6bf1884f344bba40c8709.tar.bz2 linux-dabc4ec6ba72418ebca6bf1884f344bba40c8709.zip | |
raid5: handle expansion/resync case with stripe batching
expansion/resync can grab a stripe when the stripe is in batch list. Since all
stripes in batch list must be in the same state, we can't allow some stripes
run into expansion/resync. So we delay expansion/resync for stripe in batch
list.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 24 | ||||
| -rw-r--r-- | drivers/md/raid5.h | 5 |
2 files changed, 21 insertions, 8 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 54f3cb312b42..3ae097d50b51 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3440,8 +3440,10 @@ unhash: struct stripe_head, batch_list); list_del_init(&sh->batch_list); - sh->state = head_sh->state & (~((1 << STRIPE_ACTIVE) | - (1 << STRIPE_PREREAD_ACTIVE))); + set_mask_bits(&sh->state, ~STRIPE_EXPAND_SYNC_FLAG, + head_sh->state & ~((1 << STRIPE_ACTIVE) | + (1 << STRIPE_PREREAD_ACTIVE) | + STRIPE_EXPAND_SYNC_FLAG)); sh->check_state = head_sh->check_state; sh->reconstruct_state = head_sh->reconstruct_state; for (i = 0; i < sh->disks; i++) { @@ -3453,6 +3455,8 @@ unhash: spin_lock_irq(&sh->stripe_lock); sh->batch_head = NULL; spin_unlock_irq(&sh->stripe_lock); + if (sh->state & STRIPE_EXPAND_SYNC_FLAG) + set_bit(STRIPE_HANDLE, &sh->state); release_stripe(sh); } @@ -3460,6 +3464,8 @@ unhash: head_sh->batch_head = NULL; spin_unlock_irq(&head_sh->stripe_lock); wake_up_nr(&conf->wait_for_overlap, wakeup_nr); + if (head_sh->state & STRIPE_EXPAND_SYNC_FLAG) + set_bit(STRIPE_HANDLE, &head_sh->state); } static void handle_stripe_dirtying(struct r5conf *conf, @@ -3927,8 +3933,8 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s) memset(s, 0, sizeof(*s)); - s->expanding = test_bit(STRIPE_EXPAND_SOURCE, &sh->state); - s->expanded = test_bit(STRIPE_EXPAND_READY, &sh->state); + s->expanding = test_bit(STRIPE_EXPAND_SOURCE, &sh->state) && !sh->batch_head; + s->expanded = test_bit(STRIPE_EXPAND_READY, &sh->state) && !sh->batch_head; s->failed_num[0] = -1; s->failed_num[1] = -1; @@ -4150,9 +4156,11 @@ static void check_break_stripe_batch_list(struct stripe_head *sh) struct stripe_head, batch_list); list_del_init(&sh->batch_list); - sh->state = head_sh->state & ~((1 << STRIPE_ACTIVE) | - (1 << STRIPE_PREREAD_ACTIVE) | - (1 << STRIPE_DEGRADED)); + set_mask_bits(&sh->state, ~STRIPE_EXPAND_SYNC_FLAG, + head_sh->state & ~((1 << STRIPE_ACTIVE) | + (1 << STRIPE_PREREAD_ACTIVE) | + (1 << STRIPE_DEGRADED) | + STRIPE_EXPAND_SYNC_FLAG)); sh->check_state = head_sh->check_state; sh->reconstruct_state = head_sh->reconstruct_state; for (i = 0; i < sh->disks; i++) @@ -4194,7 +4202,7 @@ static void handle_stripe(struct stripe_head *sh) check_break_stripe_batch_list(sh); - if (test_bit(STRIPE_SYNC_REQUESTED, &sh->state)) { + if (test_bit(STRIPE_SYNC_REQUESTED, &sh->state) && !sh->batch_head) { spin_lock(&sh->stripe_lock); /* Cannot process 'sync' concurrently with 'discard' */ if (!test_bit(STRIPE_DISCARD, &sh->state) && diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index cf3562e99440..ee65ed844d3f 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -339,6 +339,11 @@ enum { STRIPE_BATCH_ERR, }; +#define STRIPE_EXPAND_SYNC_FLAG \ + ((1 << STRIPE_EXPAND_SOURCE) |\ + (1 << STRIPE_EXPAND_READY) |\ + (1 << STRIPE_EXPANDING) |\ + (1 << STRIPE_SYNC_REQUESTED)) /* * Operation request flags */ |