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cpuset: Remove cpuset_cpu_is_isolated()

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The set of cpuset isolated CPUs is now included in HK_TYPE_DOMAIN
housekeeping cpumask. There is no usecase left interested in just
checking what is isolated by cpuset and not by the isolcpus= kernel
boot parameter.

Signed-off-by: Frederic Weisbecker <[email protected]>
Reviewed-by: Waiman Long <[email protected]>
Cc: "Michal Koutný" <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Marco Crivellari <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: [email protected]
This commit is contained in:
Frederic Weisbecker committed 2026-02-03 15:23:34 +01:00
1 parent 0947d018cf
commit 6440966067
3 files changed
+1 -21
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include/linux/cpuset.h
-6
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@@ -79,7 +79,6 @@ extern void cpuset_unlock(void);
extern void cpuset_cpus_allowed_locked(struct task_struct *p, struct cpumask *mask);
extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
extern bool cpuset_cpus_allowed_fallback(struct task_struct *p);
extern bool cpuset_cpu_is_isolated(int cpu);
extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
#define cpuset_current_mems_allowed (current->mems_allowed)
void cpuset_init_current_mems_allowed(void);
@@ -215,11 +214,6 @@ static inline bool cpuset_cpus_allowed_fallback(struct task_struct *p)
return false;
}
static inline bool cpuset_cpu_is_isolated(int cpu)
{
return false;
}
static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
{
return node_possible_map;
include/linux/sched/isolation.h
+1 -3
View File
@@ -2,7 +2,6 @@
#define _LINUX_SCHED_ISOLATION_H
#include <linux/cpumask.h>
#include <linux/cpuset.h>
#include <linux/init.h>
#include <linux/tick.h>
@@ -84,8 +83,7 @@ static inline bool housekeeping_cpu(int cpu, enum hk_type type)
static inline bool cpu_is_isolated(int cpu)
{
return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
!housekeeping_test_cpu(cpu, HK_TYPE_TICK) ||
cpuset_cpu_is_isolated(cpu);
!housekeeping_test_cpu(cpu, HK_TYPE_TICK);
}
#endif /* _LINUX_SCHED_ISOLATION_H */
kernel/cgroup/cpuset.c
-12
View File
@@ -29,7 +29,6 @@
#include <linux/mempolicy.h>
#include <linux/mm.h>
#include <linux/memory.h>
#include <linux/export.h>
#include <linux/rcupdate.h>
#include <linux/sched.h>
#include <linux/sched/deadline.h>
@@ -1488,17 +1487,6 @@ static void update_isolation_cpumasks(void)
isolated_cpus_updating = false;
}
/**
* cpuset_cpu_is_isolated - Check if the given CPU is isolated
* @cpu: the CPU number to be checked
* Return: true if CPU is used in an isolated partition, false otherwise
*/
bool cpuset_cpu_is_isolated(int cpu)
{
return cpumask_test_cpu(cpu, isolated_cpus);
}
EXPORT_SYMBOL_GPL(cpuset_cpu_is_isolated);
/**
* rm_siblings_excl_cpus - Remove exclusive CPUs that are used by sibling cpusets
* @parent: Parent cpuset containing all siblings