Michael, can you get your noop IPI fix into -8 and -7 and -6? :-) Andrew, can you try Michael's patch: https://www.netbsd.org/~mrg/sparc.noop.ipi.netbsd-7.diff as back ported to -7? (Michael, note that the cpu.h change in current goes into cpuvar.h in -7 and i assume -6.) thanks. .mrg.