Commit b15c2e57 authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
Browse files

[PATCH] md: move bitmap_create to after md array has been initialised 



This is important because bitmap_create uses
  mddev->resync_max_sectors
and that doesn't have a valid value until after the array
has been initialised (with pers->run()).
[It doesn't make a difference for current personalities that
 support bitmaps, but will make a difference for raid10]

This has the added advantage of meaning with can move the thread->timeout
manipulation inside the bitmap.c code instead of sprinkling identical code
throughout all personalities.

Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6ff8d8ec

drivers/md/bitmap.c

+4 −0
Original line number Diff line number Diff line
@@ -1530,6 +1530,8 @@ void bitmap_destroy(mddev_t *mddev) 
		return;



	mddev->bitmap = NULL; /* disconnect from the md device */

	if (mddev->thread)

		mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;



	bitmap_free(bitmap);

}
@@ -1636,6 +1638,8 @@ int bitmap_create(mddev_t *mddev) 


	if (IS_ERR(bitmap->writeback_daemon))

		return PTR_ERR(bitmap->writeback_daemon);

	mddev->thread->timeout = bitmap->daemon_sleep * HZ;



	return bitmap_update_sb(bitmap);



 error:

drivers/md/md.c

+9 −7
Original line number Diff line number Diff line
@@ -2054,13 +2054,15 @@ static int do_md_run(mddev_t * mddev) 
	if (start_readonly)

		mddev->ro = 2; /* read-only, but switch on first write */



	/* before we start the array running, initialise the bitmap */

	err = mddev->pers->run(mddev);

	if (!err && mddev->pers->sync_request) {

		err = bitmap_create(mddev);

	if (err)

		if (err) {

			printk(KERN_ERR "%s: failed to create bitmap (%d)\n",

			       mdname(mddev), err);

	else

		err = mddev->pers->run(mddev);

			mddev->pers->stop(mddev);

		}

	}

	if (err) {

		printk(KERN_ERR "md: pers->run() failed ...\n");

		module_put(mddev->pers->owner);

drivers/md/raid1.c

+0 −8
Original line number Diff line number Diff line
@@ -1611,7 +1611,6 @@ static int run(mddev_t *mddev) 
		       mdname(mddev));

		goto out_free_conf;

	}

	if (mddev->bitmap) mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;



	printk(KERN_INFO 

		"raid1: raid set %s active with %d out of %d mirrors\n",
@@ -1783,13 +1782,6 @@ static void raid1_quiesce(mddev_t *mddev, int state) 
		lower_barrier(conf);

		break;

	}

	if (mddev->thread) {

		if (mddev->bitmap)

			mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;

		else

			mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;

		md_wakeup_thread(mddev->thread);

	}

}

drivers/md/raid5.c

+1 −10
Original line number Diff line number Diff line
@@ -1964,9 +1964,6 @@ static int run(mddev_t *mddev) 
	/* Ok, everything is just fine now */

	sysfs_create_group(&mddev->kobj, &raid5_attrs_group);



	if (mddev->bitmap)

		mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;



	mddev->queue->unplug_fn = raid5_unplug_device;

	mddev->queue->issue_flush_fn = raid5_issue_flush;
@@ -2200,14 +2197,8 @@ static void raid5_quiesce(mddev_t *mddev, int state) 
		spin_unlock_irq(&conf->device_lock);

		break;

	}

	if (mddev->thread) {

		if (mddev->bitmap)

			mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;

		else

			mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;

		md_wakeup_thread(mddev->thread);

	}

}



static mdk_personality_t raid5_personality=

{

	.name		= "raid5",

drivers/md/raid6main.c

+1 −10
Original line number Diff line number Diff line
@@ -1990,9 +1990,6 @@ static int run(mddev_t *mddev) 
	/* Ok, everything is just fine now */

	mddev->array_size =  mddev->size * (mddev->raid_disks - 2);



	if (mddev->bitmap)

		mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;



	mddev->queue->unplug_fn = raid6_unplug_device;

	mddev->queue->issue_flush_fn = raid6_issue_flush;

	return 0;
@@ -2228,14 +2225,8 @@ static void raid6_quiesce(mddev_t *mddev, int state) 
		spin_unlock_irq(&conf->device_lock);

		break;

	}

	if (mddev->thread) {

		if (mddev->bitmap)

			mddev->thread->timeout = mddev->bitmap->daemon_sleep * HZ;

		else

			mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;

		md_wakeup_thread(mddev->thread);

	}

}



static mdk_personality_t raid6_personality=

{

	.name		= "raid6",

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