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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 <frederic@kernel.org>
Reviewed-by: Waiman Long <longman@redhat.com>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Marco Crivellari <marco.crivellari@suse.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Waiman Long <longman@redhat.com>
Cc: cgroups@vger.kernel.org
This commit is contained in:
Frederic Weisbecker 2025-05-28 18:21:32 +02:00
parent 0947d018cf
commit 6440966067
3 changed files with 1 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

6
include/linux/cpuset.h
View file

@ -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;

4
include/linux/sched/isolation.h
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 */

12
kernel/cgroup/cpuset.c
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