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Commit dfe15ac1 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by NeilBrown
Browse files

md: wakeup thread upon rdev_dec_pending() 



After each call to rdev_dec_pending() we should wakeup the
md thread if the device is found to be faulty.
Otherwise we'll incur heavy delays on failing devices.

Signed-off-by: default avatarNeil Brown <nfbrown@suse.de>
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
parent 6791875e

drivers/md/md.h

+10 −7
Original line number Original line Diff line number Diff line
@@ -474,13 +474,6 @@ static inline int mddev_trylock(struct mddev *mddev) 
}

}

extern void mddev_unlock(struct mddev *mddev);

extern void mddev_unlock(struct mddev *mddev);





static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)

{

	int faulty = test_bit(Faulty, &rdev->flags);

	if (atomic_dec_and_test(&rdev->nr_pending) && faulty)

		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);

}



static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors)

static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors)

{

{

	atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);

	atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
@@ -666,4 +659,14 @@ static inline int mddev_check_plugged(struct mddev *mddev) 
	return !!blk_check_plugged(md_unplug, mddev,

	return !!blk_check_plugged(md_unplug, mddev,

				   sizeof(struct blk_plug_cb));

				   sizeof(struct blk_plug_cb));

}

}



static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)

{

	int faulty = test_bit(Faulty, &rdev->flags);

	if (atomic_dec_and_test(&rdev->nr_pending) && faulty) {

		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);

		md_wakeup_thread(mddev->thread);

	}

}



#endif /* _MD_MD_H */
 
#endif /* _MD_MD_H */