Thread (84 messages) 84 messages, 6 authors, 2019-03-19

Re: [PATCH v7 01/15] sched/core: uclamp: Add CPU's clamp buckets refcounting

From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-03-13 17:22:45
Also in: linux-pm, lkml

On Wed, Mar 13, 2019 at 04:12:29PM +0000, Patrick Bellasi wrote:
Yes, the for looks better, but perhaps like that:

	unsigned int bucket_id = UCLAMP_BUCKETS;

 	/*
 	 * Both min and max clamps are MAX aggregated, thus the topmost
 	 * bucket with some tasks defines the rq's clamp value.
 	 */
	for (; bucket_id >= 0; --bucket_id) {
GCC will be clever and figure that unsigned will never be smaller than 0
and turn the above into an infinite loop or something daft.

That is; use 'int', not 'unsigned int' for bucket_id.
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