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Commit 2b6b2457 authored by NeilBrown's avatar NeilBrown
Browse files

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: default avatarNeilBrown <neilb@suse.de>
parent 8532e343

drivers/md/raid5.c

+9 −0
Original line number Diff line number Diff line
@@ -837,6 +837,15 @@ static void stripe_add_to_batch_list(struct r5conf *conf, struct stripe_head *sh 
		    < IO_THRESHOLD)

			md_wakeup_thread(conf->mddev->thread);



	if (test_and_clear_bit(STRIPE_BIT_DELAY, &sh->state)) {

		int seq = sh->bm_seq;

		if (test_bit(STRIPE_BIT_DELAY, &sh->batch_head->state) &&

		    sh->batch_head->bm_seq > seq)

			seq = sh->batch_head->bm_seq;

		set_bit(STRIPE_BIT_DELAY, &sh->batch_head->state);

		sh->batch_head->bm_seq = seq;

	}



	atomic_inc(&sh->count);

unlock_out:

	unlock_two_stripes(head, sh);