On 23/08/12 04:23, Frederic Weisbecker wrote: > In the old times, the whole idle task was considered > as an RCU quiescent state. But as RCU became more and > more successful overtime, some RCU read side critical > section have been added even in the code of some > architectures idle tasks, for tracing for example. Fantastic! It fixes RCU CPU stalls that we were seeing on the SMP kernel when built for generic Alpha. A build of glibc and running its test suite reliably triggers RCU CPU stalls when running a kernel built for generic Alpha. I have just built glibc and ran its test suite twice with no RCU CPU stalls with this patch against a 3.5.2 kernel! Nice. Very nice. I see the stable queue is CCed but I note the patch does not apply cleanly to the 3.2.y kernel. It would be nice to have a backport of the patches for the 3.2 stable kernel. So feel free to add: Tested-by: Michael Cree <mcree@xxxxxxxxxxxx> Cheers Michael. -- To unsubscribe from this list: send the line "unsubscribe linux-alpha" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
