diff options
| -rw-r--r-- | kernel/cgroup/cpuset.c | 58 |
1 files changed, 51 insertions, 7 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index fc1a809cd5bb..c739fda805e0 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2278,9 +2278,6 @@ static int cpuset_write_s64(struct cgroup_subsys_state *css, struct cftype *cft, case FILE_SCHED_RELAX_DOMAIN_LEVEL: retval = update_relax_domain_level(cs, val); break; - case FILE_PARTITION_ROOT: - retval = update_prstate(cs, val); - break; default: retval = -EINVAL; break; @@ -2431,8 +2428,6 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft) switch (type) { case FILE_SCHED_RELAX_DOMAIN_LEVEL: return cs->relax_domain_level; - case FILE_PARTITION_ROOT: - return cs->partition_root_state; default: BUG(); } @@ -2441,6 +2436,55 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft) return 0; } +static int sched_partition_show(struct seq_file *seq, void *v) +{ + struct cpuset *cs = css_cs(seq_css(seq)); + + switch (cs->partition_root_state) { + case PRS_ENABLED: + seq_puts(seq, "root\n"); + break; + case PRS_DISABLED: + seq_puts(seq, "member\n"); + break; + case PRS_ERROR: + seq_puts(seq, "root invalid\n"); + break; + } + return 0; +} + +static ssize_t sched_partition_write(struct kernfs_open_file *of, char *buf, + size_t nbytes, loff_t off) +{ + struct cpuset *cs = css_cs(of_css(of)); + int val; + int retval = -ENODEV; + + buf = strstrip(buf); + + /* + * Convert "root"/"1" to 1, and convert "member"/"0" to 0. + */ + if (!strcmp(buf, "root") || !strcmp(buf, "1")) + val = PRS_ENABLED; + else if (!strcmp(buf, "member") || !strcmp(buf, "0")) + val = PRS_DISABLED; + else + return -EINVAL; + + css_get(&cs->css); + mutex_lock(&cpuset_mutex); + if (!is_cpuset_online(cs)) + goto out_unlock; + + retval = update_prstate(cs, val); +out_unlock: + mutex_unlock(&cpuset_mutex); + css_put(&cs->css); + return retval ?: nbytes; +} + /* * for the common functions, 'private' gives the type of file */ @@ -2584,8 +2628,8 @@ static struct cftype dfl_files[] = { { .name = "sched.partition", - .read_s64 = cpuset_read_s64, - .write_s64 = cpuset_write_s64, + .seq_show = sched_partition_show, + .write = sched_partition_write, .private = FILE_PARTITION_ROOT, .flags = CFTYPE_NOT_ON_ROOT, }, |