On Thu, Aug 23, 2012 at 09:32:18PM +1200, Michael Cree wrote: > 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. Sure. > > So feel free to add: > > Tested-by: Michael Cree <mcree@xxxxxxxxxxxx> Thanks, but I need to refactor the patch, I suspect a problem with CONFIG_PREEMPT. -- 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
