From: Nicholas Piggin <npiggin@xxxxxxxxx> Date: Tue, 15 Sep 2020 13:24:07 +1000 > Excerpts from David Miller's message of September 15, 2020 5:59 am: >> From: Nicholas Piggin <npiggin@xxxxxxxxx> >> Date: Mon, 14 Sep 2020 14:52:18 +1000 >> >> ... >>> The basic fix for sparc64 is to remove its mm_cpumask clearing code. The >>> optimisation could be effectively restored by sending IPIs to mm_cpumask >>> members and having them remove themselves from mm_cpumask. This is more >>> tricky so I leave it as an exercise for someone with a sparc64 SMP. >>> powerpc has a (currently similarly broken) example. >>> >>> Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> >> >> Sad to see this optimization go away, but what can I do: >> >> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> >> > > Thanks Dave, any objection if we merge this via the powerpc tree > to keep the commits together? No objection.
