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>
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@ -1535,6 +1535,8 @@ typedef enum {
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FILE_MEMORY_MIGRATE,
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FILE_MEMORY_MIGRATE,
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FILE_CPULIST,
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FILE_CPULIST,
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FILE_MEMLIST,
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FILE_MEMLIST,
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FILE_EFFECTIVE_CPULIST,
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FILE_EFFECTIVE_MEMLIST,
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FILE_CPU_EXCLUSIVE,
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FILE_CPU_EXCLUSIVE,
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FILE_MEM_EXCLUSIVE,
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FILE_MEM_EXCLUSIVE,
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FILE_MEM_HARDWALL,
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FILE_MEM_HARDWALL,
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@ -1701,6 +1703,12 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
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case FILE_MEMLIST:
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case FILE_MEMLIST:
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s += nodelist_scnprintf(s, count, cs->mems_allowed);
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s += nodelist_scnprintf(s, count, cs->mems_allowed);
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break;
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break;
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case FILE_EFFECTIVE_CPULIST:
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s += cpulist_scnprintf(s, count, cs->effective_cpus);
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break;
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case FILE_EFFECTIVE_MEMLIST:
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s += nodelist_scnprintf(s, count, cs->effective_mems);
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break;
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default:
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default:
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ret = -EINVAL;
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ret = -EINVAL;
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goto out_unlock;
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goto out_unlock;
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@ -1785,6 +1793,18 @@ static struct cftype files[] = {
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.private = FILE_MEMLIST,
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.private = FILE_MEMLIST,
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},
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},
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{
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.name = "effective_cpus",
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.seq_show = cpuset_common_seq_show,
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.private = FILE_EFFECTIVE_CPULIST,
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},
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{
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.name = "effective_mems",
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.seq_show = cpuset_common_seq_show,
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.private = FILE_EFFECTIVE_MEMLIST,
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},
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{
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{
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.name = "cpu_exclusive",
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.name = "cpu_exclusive",
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.read_u64 = cpuset_read_u64,
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.read_u64 = cpuset_read_u64,
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