Messages in this thread |  | | Date | Tue, 15 Sep 2020 12:42:54 -0700 (PDT) | Subject | Re: [PATCH v2 3/4] sparc64: remove mm_cpumask clearing to fix kthread_use_mm race | From | David Miller <> |
| |
From: Nicholas Piggin <npiggin@gmail.com> 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@gmail.com> >> 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@gmail.com> >> >> Sad to see this optimization go away, but what can I do: >> >> Acked-by: David S. Miller <davem@davemloft.net> >> > > Thanks Dave, any objection if we merge this via the powerpc tree > to keep the commits together?
No objection.
|  |