forked from Minki/linux
md/raid5: ensure whole batch is delayed for all required bitmap updates.
When we add a stripe to a batch, we need to be sure that head stripe will wait for the bitmap update required for the new stripe. Signed-off-by: NeilBrown <neilb@suse.de>
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2b6b245742
@ -837,6 +837,15 @@ static void stripe_add_to_batch_list(struct r5conf *conf, struct stripe_head *sh
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< IO_THRESHOLD)
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md_wakeup_thread(conf->mddev->thread);
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if (test_and_clear_bit(STRIPE_BIT_DELAY, &sh->state)) {
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int seq = sh->bm_seq;
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if (test_bit(STRIPE_BIT_DELAY, &sh->batch_head->state) &&
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sh->batch_head->bm_seq > seq)
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seq = sh->batch_head->bm_seq;
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set_bit(STRIPE_BIT_DELAY, &sh->batch_head->state);
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sh->batch_head->bm_seq = seq;
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}
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atomic_inc(&sh->count);
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unlock_out:
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unlock_two_stripes(head, sh);
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