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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>
[satyap@codeaurora.org: Port to 4.19 by moving changes needed
from include/linux/tick.h to include/linux/sched/isolation.h]
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 Satya Durga Srinivasu Prabhala
parent 5d135373a7
commit 5a28e00796
1 changed files with 10 additions and 2 deletions
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12
include/linux/sched/isolation.h
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@@ -27,7 +27,15 @@ extern void __init housekeeping_init(void);
static inline int housekeeping_any_cpu(enum hk_flags flags) static inline int housekeeping_any_cpu(enum hk_flags flags)
{ {
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 const struct cpumask *housekeeping_cpumask(enum hk_flags flags) static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags)
@@ -46,7 +54,7 @@ static inline bool housekeeping_cpu(int cpu, enum hk_flags flags)
if (static_branch_unlikely(&housekeeping_overriden)) if (static_branch_unlikely(&housekeeping_overriden))
return housekeeping_test_cpu(cpu, flags); return housekeeping_test_cpu(cpu, flags);
#endif #endif
return true; return !cpu_isolated(cpu);
} }
#endif /* _LINUX_SCHED_ISOLATION_H */ #endif /* _LINUX_SCHED_ISOLATION_H */