On 04/08/2010 03:17 PM, Peter Zijlstra wrote:
The powerpc page table freeing relies on the fact that IRQs hold off an RCU grace period, this is currently true for all existing RCU implementations but is not an assumption Paul wants to support. Therefore, also take the RCU read lock along with disabling IRQs to ensure the RCU grace period does at least cover these lookups. Requested-by: Paul E. McKenney<paulmck@xxxxxxxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> Cc: Nick Piggin<npiggin@xxxxxxx> Cc: Benjamin Herrenschmidt<benh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx> -- 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
