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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>
hifive-unleashed-5.1
Li Zefan 2014-07-09 16:49:25 +08:00 committed by Tejun Heo
parent 5d8ba82c3a
commit afd1a8b3e0
1 changed files with 20 additions and 0 deletions
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20
kernel/cpuset.c
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@ -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;
@ -1785,6 +1793,18 @@ static struct cftype files[] = {
.private = FILE_MEMLIST,
},
{
.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,