AcoSail/kernel_optimize_test
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cpuset: use cgroup_name() in cpuset_print_task_mems_allowed()

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Use cgroup_name() instead of cgrp->dentry->name. This makes the code
a bit simpler.

While at it, remove cpuset_name and make cpuset_nodelist a local variable
to cpuset_print_task_mems_allowed().

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Li Zefan 2013-03-01 15:02:15 +08:00 committed by Tejun Heo
parent 65dff759d2
commit f440d98f8e
1 changed files with 9 additions and 23 deletions
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32
kernel/cpuset.c
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@ -264,17 +264,6 @@ static struct cpuset top_cpuset = {
static DEFINE_MUTEX(cpuset_mutex);
static DEFINE_MUTEX(callback_mutex);
/*
* cpuset_buffer_lock protects both the cpuset_name and cpuset_nodelist
* buffers. They are statically allocated to prevent using excess stack
* when calling cpuset_print_task_mems_allowed().
*/
#define CPUSET_NAME_LEN (128)
#define CPUSET_NODELIST_LEN (256)
static char cpuset_name[CPUSET_NAME_LEN];
static char cpuset_nodelist[CPUSET_NODELIST_LEN];
static DEFINE_SPINLOCK(cpuset_buffer_lock);
/*
* CPU / memory hotplug is handled asynchronously.
*/
@ -2592,6 +2581,8 @@ int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
return nodes_intersects(tsk1->mems_allowed, tsk2->mems_allowed);
}
#define CPUSET_NODELIST_LEN (256)
/**
* cpuset_print_task_mems_allowed - prints task's cpuset and mems_allowed
* @task: pointer to task_struct of some task.
@ -2602,24 +2593,19 @@ int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
*/
void cpuset_print_task_mems_allowed(struct task_struct *tsk)
{
struct dentry *dentry;
/* Statically allocated to prevent using excess stack. */
static char cpuset_nodelist[CPUSET_NODELIST_LEN];
static DEFINE_SPINLOCK(cpuset_buffer_lock);
struct cgroup *cgrp = task_cs(tsk)->css.cgroup;
dentry = task_cs(tsk)->css.cgroup->dentry;
spin_lock(&cpuset_buffer_lock);
if (!dentry) {
strcpy(cpuset_name, "/");
} else {
spin_lock(&dentry->d_lock);
strlcpy(cpuset_name, (const char *)dentry->d_name.name,
CPUSET_NAME_LEN);
spin_unlock(&dentry->d_lock);
}
nodelist_scnprintf(cpuset_nodelist, CPUSET_NODELIST_LEN,
tsk->mems_allowed);
printk(KERN_INFO "%s cpuset=%s mems_allowed=%s\n",
tsk->comm, cpuset_name, cpuset_nodelist);
tsk->comm, cgroup_name(cgrp), cpuset_nodelist);
spin_unlock(&cpuset_buffer_lock);
}