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md/raid5: output stripe state for debug 

Neil recently fixed an obscure race in break_stripe_batch_list. Debug would be
quite convenient if we know the stripe state. This is what this patch does.

Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Shaohua Li 2016-03-09 10:08:38 -08:00
parent 550da24f8d
commit fb3229d5cd
1 changed files with 6 additions and 4 deletions
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10
drivers/md/raid5.c
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@ -4236,7 +4236,7 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
list_del_init(&sh->batch_list);
WARN_ON_ONCE(sh->state & ((1 << STRIPE_ACTIVE) |
WARN_ONCE(sh->state & ((1 << STRIPE_ACTIVE) |
(1 << STRIPE_SYNCING) |
(1 << STRIPE_REPLACED) |
(1 << STRIPE_DELAYED) |
@ -4248,9 +4248,11 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
(1 << STRIPE_DISCARD) |
(1 << STRIPE_BATCH_READY) |
(1 << STRIPE_BATCH_ERR) |
(1 << STRIPE_BITMAP_PENDING)));
WARN_ON_ONCE(head_sh->state & ((1 << STRIPE_DISCARD) |
(1 << STRIPE_REPLACED)));
(1 << STRIPE_BITMAP_PENDING)),
"stripe state: %lx\n", sh->state);
WARN_ONCE(head_sh->state & ((1 << STRIPE_DISCARD) |
(1 << STRIPE_REPLACED)),
"head stripe state: %lx\n", head_sh->state);
set_mask_bits(&sh->state, ~(STRIPE_EXPAND_SYNC_FLAGS |
(1 << STRIPE_PREREAD_ACTIVE) |