Re: [PATCH] x86, acpi, idle: Restructure the mwait idle routines

From: Arjan van de Ven
Date: Tue Nov 19 2013 - 09:23:10 EST

diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c
index 8f181b3f842b..e8275f2df9af 100644
--- a/drivers/thermal/intel_powerclamp.c
+++ b/drivers/thermal/intel_powerclamp.c
@@ -438,9 +438,7 @@ static int clamp_thread(void *arg)
*/
local_touch_nmi();
stop_critical_timings();
- __monitor((void *)&current_thread_info()->flags, 0, 0);
- cpu_relax(); /* allow HT sibling to run */
- __mwait(eax, ecx);
+ mwait_idle_with_hints(eax, ecx);
start_critical_timings();
atomic_inc(&idle_wakeup_counter);
}


hmm I take it that mwait_idle_with_hints is the one that also checks need_resched() ?
if so... powerclamp may not want to use that (the whole point is to NOT give the cpu
to tasks!)
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