Re: [PATCH] Btrfs: account for the correct number of extents for delalloc reservations

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On Fri, Mar 13, 2015 at 03:12:23PM -0400, Josef Bacik wrote:
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -5136,7 +5136,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
>  	num_bytes = ALIGN(num_bytes, root->sectorsize);
>  
>  	spin_lock(&BTRFS_I(inode)->lock);
> -	BTRFS_I(inode)->outstanding_extents++;
> +	nr_extents = (unsigned)div64_u64(num_bytes +
> +					 BTRFS_MAX_EXTENT_SIZE - 1,
> +					 BTRFS_MAX_EXTENT_SIZE);

Use div_u64 as BTRFS_MAX_EXTENT_SIZE is a u32, and you can drop the
typecast.
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