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Commit ed72a3d1 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://neil.brown.name/md 

* 'for-linus' of git://neil.brown.name/md:
  md/raid5: STRIPE_ACTIVE has lock semantics, add barriers
  md/raid5: abort any pending parity operations when array fails.
parents c8c27c95 257a4b42

drivers/md/raid5.c

+10 −6
Original line number Diff line number Diff line
@@ -3110,7 +3110,7 @@ static void handle_stripe(struct stripe_head *sh) 
	struct r5dev *pdev, *qdev;



	clear_bit(STRIPE_HANDLE, &sh->state);

	if (test_and_set_bit(STRIPE_ACTIVE, &sh->state)) {

	if (test_and_set_bit_lock(STRIPE_ACTIVE, &sh->state)) {

		/* already being handled, ensure it gets handled

		 * again when current action finishes */

		set_bit(STRIPE_HANDLE, &sh->state);
@@ -3159,10 +3159,14 @@ static void handle_stripe(struct stripe_head *sh) 
	/* check if the array has lost more than max_degraded devices and,

	 * if so, some requests might need to be failed.

	 */

	if (s.failed > conf->max_degraded && s.to_read+s.to_write+s.written)

	if (s.failed > conf->max_degraded) {

		sh->check_state = 0;

		sh->reconstruct_state = 0;

		if (s.to_read+s.to_write+s.written)

			handle_failed_stripe(conf, sh, &s, disks, &s.return_bi);

	if (s.failed > conf->max_degraded && s.syncing)

		if (s.syncing)

			handle_failed_sync(conf, sh, &s);

	}



	/*

	 * might be able to return some write requests if the parity blocks
@@ -3371,7 +3375,7 @@ finish: 


	return_io(s.return_bi);



	clear_bit(STRIPE_ACTIVE, &sh->state);

	clear_bit_unlock(STRIPE_ACTIVE, &sh->state);

}



static void raid5_activate_delayed(struct r5conf *conf)