On Tue, 2017-06-13 at 13:05:51 UTC, Nicholas Piggin wrote: > Idle code now always runs at the 0xc... effective address whether > in real or virtual mode. This means rfid can be ditched, along > with a lot of SRR manipulations. > > In the wakeup path, carry SRR1 around in r12. Use mtmsrd to change > MSR states as required. > > This also balances the return prediction for the idle call, by > doing blr rather than rfid to return to the idle caller. > > On POWER9, 2-process context switch on different cores, with snooze > disabled, increases performance by 2%.
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/9d29250136f60438fc0839871bae0a cheers
