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39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From 8cdb34edfcfc64ca7dbf397f0f9235f2d8d6762f Mon Sep 17 00:00:00 2001
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From: Anna-Maria Gleixner <anna-maria@linutronix.de>
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Date: Wed, 20 Dec 2017 17:13:10 +0100
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Subject: [PATCH 037/414] hrtimer: Make remote enqueue decision less
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restrictive
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The current decision whether a timer can be queued on a remote CPU checks
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for timer->expiry <= remote_cpu_base.expires_next.
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This is too restrictive because a timer with the same expiry time as an
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existing timer will be enqueued on right-hand size of the existing timer
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inside the rbtree, i.e. behind the first expiring timer.
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So its safe to allow enqueuing timers with the same expiry time as the
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first expiring timer on a remote CPU base.
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Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/time/hrtimer.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
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index 35d7d0c8c3d6..1b2866645c83 100644
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--- a/kernel/time/hrtimer.c
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+++ b/kernel/time/hrtimer.c
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@@ -168,7 +168,7 @@ hrtimer_check_target(struct hrtimer *timer, struct hrtimer_clock_base *new_base)
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ktime_t expires;
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expires = ktime_sub(hrtimer_get_expires(timer), new_base->offset);
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- return expires <= new_base->cpu_base->expires_next;
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+ return expires < new_base->cpu_base->expires_next;
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}
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static inline
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--
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2.17.0
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