ACK/cmt / APPLIED[artful]: [Zesty][PATCH 1/1] powerpc/perf: Avoid spurious PMU interrupts after idle

Seth Forshee seth.forshee at
Fri Aug 11 15:31:21 UTC 2017

On Wed, Aug 09, 2017 at 10:44:56AM -0300, Rodrigo R. Galvao wrote:
> From: Nicholas Piggin <npiggin at>
> BugLink:
> POWER9 DD2 can see spurious PMU interrupts after state-loss idle in
> some conditions.
> A solution is to save and reload MMCR0 over state-loss idle.
> Signed-off-by: Nicholas Piggin <npiggin at>
> Acked-by: Madhavan Srinivasan <maddy at>
> Tested-by: Anton Blanchard <anton at>
> Signed-off-by: Michael Ellerman <mpe at>
> (cherry picked from commit 101dd590a7fa37954540cf3149a1c502c0acc524)
> Signed-off-by: Rodrigo R. Galvao <rosattig at>

This patch had some context differences when I tried to apply it to
4.12 so I cherry picked it directly. That makes me wonder whether you
had to fix it up for zesty though; if so the "cherry picked" should be
changed to "backported".

Otherwise the patch looks fine to me.

Acked-by: Seth Forshee <seth.forshee at>

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