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Date: Mon, 10 Jul 2017 09:38:36 +0800 From: Aubrey Li <aubrey.li@...el.com> To: tglx@...utronix.de, peterz@...radead.org, len.brown@...el.com, rjw@...ysocki.net, ak@...ux.intel.com, tim.c.chen@...ux.intel.com, arjan@...ux.intel.com, paulmck@...ux.vnet.ibm.com, yang.zhang.wz@...il.com Cc: x86@...nel.org, linux-kernel@...r.kernel.org, Aubrey Li <aubrey.li@...ux.intel.com> Subject: [RFC PATCH v1 06/11] timers: keep sleep length updated as needed From: Aubrey Li <aubrey.li@...ux.intel.com> sleep length indicates how long we'll be idle. Currently, it's updated only when tick nohz enters. These patch series make a new requirement with tick, so we should keep sleep length updated as needed --- kernel/time/tick-sched.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 7fe53be..8bf6e8b 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -988,8 +988,11 @@ void tick_nohz_irq_exit(void) */ ktime_t tick_nohz_get_sleep_length(void) { + struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev); struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched); + ts->sleep_length = ktime_sub(dev->next_event, ktime_get()); + return ts->sleep_length; } -- 2.7.4
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