Re: [PATCH] NFS: Fix RCU warnings in nfs_inode_return_delegation_noreclaim() [ver #2]

Paul E. McKenney
2010-03-29T22:36:11Z

On Mon, Mar 29, 2010 at 11:22:30PM +0100, David Howells wrote:
> Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:
>
> > And rcu_dereference_raw() is the same as the old rcu_dereference().
>
> Exactly. That's the other half of the issue - that interpolates a redundant
> memory barrier.

Only on Alpha. Otherwise only a volatile access.

Thanx, Paul