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Commit ca2c4c65 authored by Olav Haugan's avatar Olav Haugan
Browse files

sched/tick: Ensure timers does not get queued on isolated cpus 



Timers should not be queued on isolated cpus. Instead try to find
other cpus to queue timer on.

Change-Id: I5d849dfd29aa5bb594454473768d7db1da258028
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
parent 639c8ad5

include/linux/tick.h

+10 −2
Original line number Diff line number Diff line
@@ -161,7 +161,15 @@ extern void __tick_nohz_task_switch(void); 
#else

static inline int housekeeping_any_cpu(void)

{

	return smp_processor_id();

	cpumask_t available;

	int cpu;



	cpumask_andnot(&available, cpu_online_mask, cpu_isolated_mask);

	cpu = cpumask_any(&available);

	if (cpu >= nr_cpu_ids)

		cpu = smp_processor_id();



	return cpu;

}

static inline bool tick_nohz_full_enabled(void) { return false; }

static inline bool tick_nohz_full_cpu(int cpu) { return false; }
@@ -187,7 +195,7 @@ static inline bool is_housekeeping_cpu(int cpu) 
	if (tick_nohz_full_enabled())

		return cpumask_test_cpu(cpu, housekeeping_mask);

#endif

	return true;

	return !cpu_isolated(cpu);

}



static inline void housekeeping_affine(struct task_struct *t)