diff options
| author | Kajetan Puchalski <kajetan.puchalski@arm.com> | 2023-01-05 14:51:58 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-01-10 20:53:22 +0100 |
| commit | 27f850880192c19a26d89dab19e2bddcf276032f (patch) | |
| tree | 53737a3c68c924091e4cfafa0f91309128d7f9ff /drivers/cpuidle | |
| parent | b7bfaa761d760e72a969d116517eaa12e404c262 (diff) | |
| download | linux-27f850880192c19a26d89dab19e2bddcf276032f.tar.gz | |
cpuidle: teo: Optionally skip polling states in teo_find_shallower_state()
Add a no_poll flag to teo_find_shallower_state() that will let the
function optionally not consider polling states.
This allows the caller to guard against the function inadvertently
resulting in TEO putting the CPU in a polling state when that
behaviour is undesirable.
Signed-off-by: Kajetan Puchalski <kajetan.puchalski@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/governors/teo.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/cpuidle/governors/teo.c b/drivers/cpuidle/governors/teo.c index d9262db79cae5..e2864474a98d6 100644 --- a/drivers/cpuidle/governors/teo.c +++ b/drivers/cpuidle/governors/teo.c @@ -258,15 +258,17 @@ static s64 teo_middle_of_bin(int idx, struct cpuidle_driver *drv) * @dev: Target CPU. * @state_idx: Index of the capping idle state. * @duration_ns: Idle duration value to match. + * @no_poll: Don't consider polling states. */ static int teo_find_shallower_state(struct cpuidle_driver *drv, struct cpuidle_device *dev, int state_idx, - s64 duration_ns) + s64 duration_ns, bool no_poll) { int i; for (i = state_idx - 1; i >= 0; i--) { - if (dev->states_usage[i].disable) + if (dev->states_usage[i].disable || + (no_poll && drv->states[i].flags & CPUIDLE_FLAG_POLLING)) continue; state_idx = i; @@ -469,7 +471,7 @@ end: */ if (idx > idx0 && drv->states[idx].target_residency_ns > delta_tick) - idx = teo_find_shallower_state(drv, dev, idx, delta_tick); + idx = teo_find_shallower_state(drv, dev, idx, delta_tick, false); } return idx; |