Re: [PATCH v7 02/15] sched/core: uclamp: Enforce last task UCLAMP_MAX
From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-03-13 14:10:17
Also in:
linux-pm, lkml
From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-03-13 14:10:17
Also in:
linux-pm, lkml
On Fri, Feb 08, 2019 at 10:05:41AM +0000, Patrick Bellasi wrote:
+uclamp_idle_value(struct rq *rq, unsigned int clamp_id, unsigned int clamp_value)
+{
+ /*
+ * Avoid blocked utilization pushing up the frequency when we go
+ * idle (which drops the max-clamp) by retaining the last known
+ * max-clamp.
+ */
+ if (clamp_id == UCLAMP_MAX) {
+ rq->uclamp_flags |= UCLAMP_FLAG_IDLE;
+ return clamp_value;
+ }
+
+ return uclamp_none(UCLAMP_MIN);That's a very complicated way or writing: return 0, right?
+}