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authorFrederic Weisbecker <frederic@kernel.org>2017-10-27 04:42:31 +0200
committerIngo Molnar <mingo@kernel.org>2017-10-27 09:55:26 +0200
commit7e56a1cf4b28f5739526877b8dbad623fae2e4e7 (patch)
tree5f540ce0a22d30caed0fb1e54f865ea65373ff38 /kernel/sched/isolation.c
parentsched/isolation: Provide a dynamic off-case to housekeeping_any_cpu() (diff)
downloadlinux-7e56a1cf4b28f5739526877b8dbad623fae2e4e7.tar.xz
linux-7e56a1cf4b28f5739526877b8dbad623fae2e4e7.zip
sched/isolation: Make the housekeeping cpumask private
Nobody needs to access this detail. housekeeping_cpumask() already takes care of it. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Christoph Lameter <cl@linux.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Wanpeng Li <kernellwp@gmail.com> Link: http://lkml.kernel.org/r/1509072159-31808-5-git-send-email-frederic@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/isolation.c')
-rw-r--r--kernel/sched/isolation.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index 3589252ed476..16445097eb25 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -11,7 +11,41 @@
#include <linux/init.h>
#include <linux/kernel.h>
-cpumask_var_t housekeeping_mask;
+static cpumask_var_t housekeeping_mask;
+
+int housekeeping_any_cpu(void)
+{
+ if (tick_nohz_full_enabled())
+ return cpumask_any_and(housekeeping_mask, cpu_online_mask);
+
+ return smp_processor_id();
+}
+EXPORT_SYMBOL_GPL(housekeeping_any_cpu);
+
+const struct cpumask *housekeeping_cpumask(void)
+{
+ if (tick_nohz_full_enabled())
+ return housekeeping_mask;
+
+ return cpu_possible_mask;
+}
+EXPORT_SYMBOL_GPL(housekeeping_cpumask);
+
+void housekeeping_affine(struct task_struct *t)
+{
+ if (tick_nohz_full_enabled())
+ set_cpus_allowed_ptr(t, housekeeping_mask);
+}
+EXPORT_SYMBOL_GPL(housekeeping_affine);
+
+bool housekeeping_test_cpu(int cpu)
+{
+ if (tick_nohz_full_enabled())
+ return cpumask_test_cpu(cpu, housekeeping_mask);
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(housekeeping_test_cpu);
void __init housekeeping_init(void)
{