On Thu, Aug 29, 2013 at 1:28 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > On Wednesday, August 28, 2013 06:41:47 PM Colin Cross wrote: >> Joseph Lo <josephl@xxxxxxxxxx> reported a lockup on Tegra20 caused >> by a race condition in coupled cpuidle. When two or more cpus >> enter idle at the same time, the first cpus to arrive may go to the >> ready loop without processing pending pokes from the last cpu to >> arrive. >> >> This patch adds a check for pending pokes once all cpus have been >> synchronized in the ready loop and resets the coupled state and >> retries if any cpus failed to handle their pending poke. >> >> Retrying on all cpus may trigger the same issue again, so this patch >> also adds a check to ensure that each cpu has received at least one >> poke between when it enters the waiting loop and when it moves on to >> the ready loop. >> >> Reported-by: Joseph Lo <josephl@xxxxxxxxxx> >> Tested-by: Stephen Warren <swarren@xxxxxxxxxx> >> Tested-by: Joseph Lo <josephl@xxxxxxxxxx> >> Signed-off-by: Colin Cross <ccross@xxxxxxxxxxx> > > Still stable material I suppose? Yes please -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
