On Tue, Jan 14, 2014 at 11:44:04PM -0500, Waiman Long wrote: > This patch makes the necessary changes at the x86 architecture specific > layer to enable the presence of the CONFIG_QUEUE_RWLOCK kernel option > to replace the read/write lock by the queue read/write lock. > > It also enables the CONFIG_QUEUE_RWLOCK option by default for x86 which > will force the use of queue read/write lock. That will greatly improve > the fairness of read/write lock and eliminate live-lock situation > where one task may not get the lock for an indefinite period of time. > > Signed-off-by: Waiman Long <Waiman.Long@xxxxxx> > Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > --- > arch/x86/Kconfig | 1 + > arch/x86/include/asm/spinlock.h | 2 ++ > arch/x86/include/asm/spinlock_types.h | 4 ++++ > 3 files changed, 7 insertions(+), 0 deletions(-) This patch doesn't have nearly enough -, you should rip out all traces of the old rwlock. There's no point in having it configurable, either qrwlock is good or not. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
