61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
Subject: softirq-make-fifo.patch
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Thu, 21 Jul 2011 21:06:43 +0200
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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kernel/softirq.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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Index: linux-3.2/kernel/softirq.c
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===================================================================
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--- linux-3.2.orig/kernel/softirq.c
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+++ linux-3.2/kernel/softirq.c
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@@ -372,6 +372,8 @@ asmlinkage void do_softirq(void)
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static inline void local_bh_disable_nort(void) { local_bh_disable(); }
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static inline void _local_bh_enable_nort(void) { _local_bh_enable(); }
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+static inline void ksoftirqd_set_sched_params(void) { }
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+static inline void ksoftirqd_clr_sched_params(void) { }
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#else /* !PREEMPT_RT_FULL */
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@@ -526,6 +528,20 @@ static int ksoftirqd_do_softirq(int cpu)
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static inline void local_bh_disable_nort(void) { }
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static inline void _local_bh_enable_nort(void) { }
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+static inline void ksoftirqd_set_sched_params(void)
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+{
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+ struct sched_param param = { .sched_priority = 1 };
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+
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+ sched_setscheduler(current, SCHED_FIFO, ¶m);
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+}
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+
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+static inline void ksoftirqd_clr_sched_params(void)
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+{
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+ struct sched_param param = { .sched_priority = 0 };
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+
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+ sched_setscheduler(current, SCHED_NORMAL, ¶m);
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+}
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+
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#endif /* PREEMPT_RT_FULL */
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/*
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* Enter an interrupt context.
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@@ -985,6 +1001,8 @@ void __init softirq_init(void)
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static int run_ksoftirqd(void * __bind_cpu)
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{
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+ ksoftirqd_set_sched_params();
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+
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set_current_state(TASK_INTERRUPTIBLE);
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while (!kthread_should_stop()) {
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@@ -1010,6 +1028,7 @@ static int run_ksoftirqd(void * __bind_c
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wait_to_die:
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preempt_enable();
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+ ksoftirqd_clr_sched_params();
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/* Wait for kthread_stop */
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set_current_state(TASK_INTERRUPTIBLE);
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while (!kthread_should_stop()) {
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