On Fri, 2013-11-08 at 13:21 -0800, Paul E. McKenney wrote: > On Mon, Nov 04, 2013 at 12:17:20PM -0500, Waiman Long wrote: > > There is a pending patch in the rwsem patch series that adds a generic > > MCS locking helper functions to do MCS-style locking. This patch > > will enable the queue rwlock to use that generic MCS lock/unlock > > primitives for internal queuing. This patch should only be merged > > after the merging of that generic MCS locking patch. > > > > Signed-off-by: Waiman Long <[email protected]> > > This one does might address at least some of the earlier memory-barrier > issues, at least assuming that the MCS lock is properly memory-barriered.
Paul, will appreciate if you can take a look the latest version of MCS lock with load-acquire and store-release to see if it is now properly memory-barriered. Thanks. Tim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
