diff options
| author | Li Zefan <lizefan@huawei.com> | 2014-07-09 16:49:25 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-07-09 15:56:18 -0400 |
| commit | afd1a8b3e0bc4d045d762dfdbc4d0cee189893a4 (patch) | |
| tree | e552df774556b1b91271da1107831834d809c1de /kernel/cpuset.c | |
| parent | 5d8ba82c3a1f10b77bf39ee3e7670d6789a8d149 (diff) | |
| download | lwn-afd1a8b3e0bc4d045d762dfdbc4d0cee189893a4.tar.gz lwn-afd1a8b3e0bc4d045d762dfdbc4d0cee189893a4.zip | |
cpuset: export effective masks to userspace
cpuset.cpus and cpuset.mems are the configured masks, and we need
to export effective masks to userspace, so users know the real
cpus_allowed and mems_allowed that apply to the tasks in a cpuset.
v2:
- export those masks unconditionally, suggested by Tejun.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cpuset.c')
| -rw-r--r-- | kernel/cpuset.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 65878a74a66b..53a9bbf16391 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1535,6 +1535,8 @@ typedef enum { FILE_MEMORY_MIGRATE, FILE_CPULIST, FILE_MEMLIST, + FILE_EFFECTIVE_CPULIST, + FILE_EFFECTIVE_MEMLIST, FILE_CPU_EXCLUSIVE, FILE_MEM_EXCLUSIVE, FILE_MEM_HARDWALL, @@ -1701,6 +1703,12 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v) case FILE_MEMLIST: s += nodelist_scnprintf(s, count, cs->mems_allowed); break; + case FILE_EFFECTIVE_CPULIST: + s += cpulist_scnprintf(s, count, cs->effective_cpus); + break; + case FILE_EFFECTIVE_MEMLIST: + s += nodelist_scnprintf(s, count, cs->effective_mems); + break; default: ret = -EINVAL; goto out_unlock; @@ -1786,6 +1794,18 @@ static struct cftype files[] = { }, { + .name = "effective_cpus", + .seq_show = cpuset_common_seq_show, + .private = FILE_EFFECTIVE_CPULIST, + }, + + { + .name = "effective_mems", + .seq_show = cpuset_common_seq_show, + .private = FILE_EFFECTIVE_MEMLIST, + }, + + { .name = "cpu_exclusive", .read_u64 = cpuset_read_u64, .write_u64 = cpuset_write_u64, |