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Commit afd1a8b3 authored by Li Zefan's avatar Li Zefan Committed by Tejun Heo
Browse files

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: default avatarLi Zefan <lizefan@huawei.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 5d8ba82c

kernel/cpuset.c

+20 −0
Original line number Diff line number Diff line
@@ -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,