On Wed, Mar 06, 2013 at 10:57:55AM +0200, Ilya Dryomov
wrote:> Raid56 merge (merge commit e942f88) had mistakenly removed a call to
> __cancel_balance(), which resulted in balance not cleaning up after itself
> after a successful finish.  (Cleanup includes switching the state, removing
> the balance item and releasing mut_ex_op testnset lock.)  Bring it back.
> 
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
> Reported-by: David Sterba <dsterba@suse.cz>
> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
> ---
>  fs/btrfs/volumes.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 35bb2d4..33440da 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -3230,6 +3230,11 @@ int btrfs_balance(struct btrfs_balance_control
*bctl,
>  		update_ioctl_balance_args(fs_info, 0, bargs);
>  	}
>  
> +	if ((ret && ret != -ECANCELED && ret != -ENOSPC) ||
> +	    balance_need_close(fs_info)) {
> +		__cancel_balance(fs_info);
> +	}
> +
>  	wake_up(&fs_info->balance_wait_q);
>  
>  	return ret;
> -- 
> 1.7.9.1
> 
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