* [PATCH] cpuidle: use first valid target residency as poll time
@ 2019-12-06 15:07 Marcelo Tosatti
2019-12-09 9:39 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Marcelo Tosatti @ 2019-12-06 15:07 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: linux-kernel, linux-pm
commit 259231a045616c4101d023a8f4dcc8379af265a6 changed, by mistake,
the target residency from the first available sleep state to the last
available sleep state (which should be longer).
This might cause excessive polling.
Fixes: 259231a045616c4101d023a8f4dcc8379af265a6
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 0005be5ea2b4..15877b431143 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -382,6 +382,7 @@ u64 cpuidle_poll_time(struct cpuidle_driver *drv,
continue;
limit_ns = (u64)drv->states[i].target_residency_ns;
+ break;
}
dev->poll_limit_ns = limit_ns;
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] cpuidle: use first valid target residency as poll time
2019-12-06 15:07 [PATCH] cpuidle: use first valid target residency as poll time Marcelo Tosatti
@ 2019-12-09 9:39 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2019-12-09 9:39 UTC (permalink / raw)
To: Marcelo Tosatti; +Cc: Rafael J. Wysocki, Linux Kernel Mailing List, Linux PM
On Fri, Dec 6, 2019 at 5:17 PM Marcelo Tosatti <mtosatti@redhat.com> wrote:
>
>
> commit 259231a045616c4101d023a8f4dcc8379af265a6 changed, by mistake,
> the target residency from the first available sleep state to the last
> available sleep state (which should be longer).
>
> This might cause excessive polling.
>
> Fixes: 259231a045616c4101d023a8f4dcc8379af265a6
>
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Applied as 5.5 material (and tagged for 5.4+-stable), thanks!
> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> index 0005be5ea2b4..15877b431143 100644
> --- a/drivers/cpuidle/cpuidle.c
> +++ b/drivers/cpuidle/cpuidle.c
> @@ -382,6 +382,7 @@ u64 cpuidle_poll_time(struct cpuidle_driver *drv,
> continue;
>
> limit_ns = (u64)drv->states[i].target_residency_ns;
> + break;
> }
>
> dev->poll_limit_ns = limit_ns;
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-12-06 15:07 [PATCH] cpuidle: use first valid target residency as poll time Marcelo Tosatti
2019-12-09 9:39 ` Rafael J. Wysocki
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