[PATCH,reflink] xfs: use GPF_NOFS in xfs_refcountbt_init_cursor

[Darrick J. Wong]

On Mon, May 23, 2016 at 05:07:57PM +0200, Christoph Hellwig wrote:
> As it can be called under the ilock.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  fs/xfs/libxfs/xfs_refcount_btree.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_refcount_btree.c b/fs/xfs/libxfs/xfs_refcount_btree.c
> index 770aee5..3391cbd 100644
> --- a/fs/xfs/libxfs/xfs_refcount_btree.c
> +++ b/fs/xfs/libxfs/xfs_refcount_btree.c
> @@ -339,7 +339,7 @@ xfs_refcountbt_init_cursor(
>  
>  	ASSERT(agno != NULLAGNUMBER);
>  	ASSERT(agno < mp->m_sb.sb_agcount);
> -	cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
> +	cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);

Looks reasonable, though I suspect the rmapbt cursor needs the same
treatment, since it too can be called that way, I think.

/me has been wondering if all of those cursor allocations ought to be
KM_NOFS, though I haven't had time to investigate that.

--D

>  
>  	cur->bc_tp = tp;
>  	cur->bc_mp = mp;
> -- 
> 2.1.4
>