cpuset: introduce CS_ONLINE
Add CS_ONLINE which is set from css_online() and cleared from css_offline(). This will enable using generic cgroup iterator while allowing decoupling cpuset from cgroup internal locking. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
parent
c8f699bb56
commit
efeb77b2f1
|
@ -138,6 +138,7 @@ static inline bool task_has_mempolicy(struct task_struct *task)
|
||||||
|
|
||||||
/* bits in struct cpuset flags field */
|
/* bits in struct cpuset flags field */
|
||||||
typedef enum {
|
typedef enum {
|
||||||
|
CS_ONLINE,
|
||||||
CS_CPU_EXCLUSIVE,
|
CS_CPU_EXCLUSIVE,
|
||||||
CS_MEM_EXCLUSIVE,
|
CS_MEM_EXCLUSIVE,
|
||||||
CS_MEM_HARDWALL,
|
CS_MEM_HARDWALL,
|
||||||
|
@ -154,6 +155,11 @@ enum hotplug_event {
|
||||||
};
|
};
|
||||||
|
|
||||||
/* convenient tests for these bits */
|
/* convenient tests for these bits */
|
||||||
|
static inline bool is_cpuset_online(const struct cpuset *cs)
|
||||||
|
{
|
||||||
|
return test_bit(CS_ONLINE, &cs->flags);
|
||||||
|
}
|
||||||
|
|
||||||
static inline int is_cpu_exclusive(const struct cpuset *cs)
|
static inline int is_cpu_exclusive(const struct cpuset *cs)
|
||||||
{
|
{
|
||||||
return test_bit(CS_CPU_EXCLUSIVE, &cs->flags);
|
return test_bit(CS_CPU_EXCLUSIVE, &cs->flags);
|
||||||
|
@ -190,7 +196,8 @@ static inline int is_spread_slab(const struct cpuset *cs)
|
||||||
}
|
}
|
||||||
|
|
||||||
static struct cpuset top_cpuset = {
|
static struct cpuset top_cpuset = {
|
||||||
.flags = ((1 << CS_CPU_EXCLUSIVE) | (1 << CS_MEM_EXCLUSIVE)),
|
.flags = ((1 << CS_ONLINE) | (1 << CS_CPU_EXCLUSIVE) |
|
||||||
|
(1 << CS_MEM_EXCLUSIVE)),
|
||||||
};
|
};
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -1822,6 +1829,7 @@ static int cpuset_css_online(struct cgroup *cgrp)
|
||||||
if (!parent)
|
if (!parent)
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
|
set_bit(CS_ONLINE, &cs->flags);
|
||||||
if (is_spread_page(parent))
|
if (is_spread_page(parent))
|
||||||
set_bit(CS_SPREAD_PAGE, &cs->flags);
|
set_bit(CS_SPREAD_PAGE, &cs->flags);
|
||||||
if (is_spread_slab(parent))
|
if (is_spread_slab(parent))
|
||||||
|
@ -1871,6 +1879,7 @@ static void cpuset_css_offline(struct cgroup *cgrp)
|
||||||
update_flag(CS_SCHED_LOAD_BALANCE, cs, 0);
|
update_flag(CS_SCHED_LOAD_BALANCE, cs, 0);
|
||||||
|
|
||||||
number_of_cpusets--;
|
number_of_cpusets--;
|
||||||
|
clear_bit(CS_ONLINE, &cs->flags);
|
||||||
|
|
||||||
cgroup_unlock();
|
cgroup_unlock();
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue