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Subject[PATCH 2/5] RT - fix reschedule IPI
Date
From: Mike Kravetz <kravetz@us.ibm.com>

x86_64 based RESCHED_IPIs fail to set the reschedule flag

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
---

arch/x86_64/kernel/smp.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index a5bf746..3ce6cad 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -505,13 +505,13 @@ void smp_send_stop(void)
}

/*
- * Reschedule call back. Nothing to do,
- * all the work is done automatically when
- * we return from the interrupt.
+ * Reschedule call back. Trigger a reschedule pass so that
+ * RT-overload balancing can pass tasks around.
*/
asmlinkage void smp_reschedule_interrupt(void)
{
ack_APIC_irq();
+ set_tsk_need_resched(current);
}

asmlinkage void smp_call_function_interrupt(void)
-
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