Commit 84a80f62 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4.1: Convert pNFS deviceid to use kfree_rcu() 



Use of synchronize_rcu() when unmounting and potentially freeing a lot
of deviceids is problematic. There really is no reason why we can't just
use kfree_rcu() here.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 2854475f

fs/nfs/blocklayout/dev.c

+1 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ bl_free_deviceid_node(struct nfs4_deviceid_node *d) 
		container_of(d, struct pnfs_block_dev, node);



	bl_free_device(dev);

	kfree(dev);

	kfree_rcu(dev, node.rcu);

}



static int

fs/nfs/filelayout/filelayoutdev.c

+1 −1
Original line number Diff line number Diff line
@@ -55,7 +55,7 @@ nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) 
			nfs4_pnfs_ds_put(ds);

	}

	kfree(dsaddr->stripe_indices);

	kfree(dsaddr);

	kfree_rcu(dsaddr, id_node.rcu);

}



/* Decode opaque device data and return the result */

fs/nfs/flexfilelayout/flexfilelayoutdev.c

+1 −1
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds) 
{

	nfs4_print_deviceid(&mirror_ds->id_node.deviceid);

	nfs4_pnfs_ds_put(mirror_ds->ds);

	kfree(mirror_ds);

	kfree_rcu(mirror_ds, id_node.rcu);

}



/* Decode opaque device data and construct new_ds using it */

fs/nfs/objlayout/objio_osd.c

+1 −1
Original line number Diff line number Diff line
@@ -57,7 +57,7 @@ objio_free_deviceid_node(struct nfs4_deviceid_node *d) 


	dprintk("%s: free od=%p\n", __func__, de->od.od);

	osduld_put_device(de->od.od);

	kfree(de);

	kfree_rcu(d, rcu);

}



struct objio_segment {

fs/nfs/pnfs.h

+1 −0
Original line number Diff line number Diff line
@@ -302,6 +302,7 @@ struct nfs4_deviceid_node { 
	unsigned long 			flags;

	unsigned long			timestamp_unavailable;

	struct nfs4_deviceid		deviceid;

	struct rcu_head			rcu;

	atomic_t			ref;

};