Commits
Nicholas Piggin committed 8c1c7fb0b5e
powerpc/64s/idle: avoid sync for KVM state when waking from idle When waking from a CPU idle instruction (e.g., nap or stop), the sync for ordering the KVM secondary thread state can be avoided if there wakeup is coming from a kernel context rather than KVM context. This improves performance for ping-pong benchmark with the stop0 idle state by 0.46% for 2 threads in the same core, and 1.02% for different cores. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>