On Thu, Aug 29, 2013 at 1:28 PM, Rafael J. Wysocki <[email protected]> wrote: > On Wednesday, August 28, 2013 06:41:47 PM Colin Cross wrote: >> Joseph Lo <[email protected]> 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 <[email protected]> >> Tested-by: Stephen Warren <[email protected]> >> Tested-by: Joseph Lo <[email protected]> >> Signed-off-by: Colin Cross <[email protected]> > > Still stable material I suppose?
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