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

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

Change-Id: I7a1a8aade8630226d7349cc37afd1a3abe48fc67
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
This commit is contained in:
Olav Haugan 2016-06-02 16:29:27 -07:00 committed by Gerrit - the friendly Code Review server
parent 2373df9082
commit 17e12d32da
1 changed files with 10 additions and 2 deletions
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12
include/linux/tick.h
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@ -239,7 +239,15 @@ 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; }
@ -277,7 +285,7 @@ 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)