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From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-doc@vger.kernel.org, kernel-team@fb.com, pjt@google.com,
	luto@amacapital.net, Mike Galbraith <efault@gmx.de>,
	torvalds@linux-foundation.org, Roman Gushchin <guro@fb.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Patrick Bellasi <patrick.bellasi@arm.com>,
	Tom Hromatka <tom.hromatka@oracle.com>,
	Waiman Long <longman@redhat.com>
Subject: [PATCH v14 09/12] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root
Date: Mon, 15 Oct 2018 16:29:34 -0400	[thread overview]
Message-ID: <1539635377-22335-10-git-send-email-longman@redhat.com> (raw)
In-Reply-To: <1539635377-22335-1-git-send-email-longman@redhat.com>

Because of the fact that setting the "cpuset.sched.partition" in
a direct child of root can remove CPUs from the root's effective CPU
list, it makes sense to know what CPUs are left in the root cgroup for
scheduling purpose. So the "cpuset.cpus.effective" control file is now
exposed in the v2 cgroup root.

For consistency, the "cpuset.mems.effective" control file is exposed
as well.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 Documentation/admin-guide/cgroup-v2.rst | 4 ++--
 kernel/cgroup/cpuset.c                  | 2 --
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 0465c231e2fb..533e85cb851b 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1631,7 +1631,7 @@ Cpuset Interface Files
 	and won't be affected by any CPU hotplug events.
 
   cpuset.cpus.effective
-	A read-only multiple values file which exists on non-root
+	A read-only multiple values file which exists on all
 	cpuset-enabled cgroups.
 
 	It lists the onlined CPUs that are actually granted to this
@@ -1671,7 +1671,7 @@ Cpuset Interface Files
 	and won't be affected by any memory nodes hotplug events.
 
   cpuset.mems.effective
-	A read-only multiple values file which exists on non-root
+	A read-only multiple values file which exists on all
 	cpuset-enabled cgroups.
 
 	It lists the onlined memory nodes that are actually granted to
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 53dbd473bd7e..b9832e355e36 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2569,14 +2569,12 @@ static struct cftype dfl_files[] = {
 		.name = "cpus.effective",
 		.seq_show = cpuset_common_seq_show,
 		.private = FILE_EFFECTIVE_CPULIST,
-		.flags = CFTYPE_NOT_ON_ROOT,
 	},
 
 	{
 		.name = "mems.effective",
 		.seq_show = cpuset_common_seq_show,
 		.private = FILE_EFFECTIVE_MEMLIST,
-		.flags = CFTYPE_NOT_ON_ROOT,
 	},
 
 	{
-- 
2.18.0


  parent reply	other threads:[~2018-10-15 20:30 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-15 20:29 [PATCH v14 00/12] Enable cpuset controller in default hierarchy Waiman Long
2018-10-15 20:29 ` [PATCH v14 01/12] cpuset: " Waiman Long
2018-10-15 20:29 ` [PATCH v14 02/12] cpuset: Define data structures to support scheduling partition Waiman Long
2018-10-15 20:29 ` [PATCH v14 03/12] cpuset: Simply allocation and freeing of cpumasks Waiman Long
2018-10-19 15:28   ` Tom Hromatka
2018-10-15 20:29 ` [PATCH v14 04/12] cpuset: Add new v2 cpuset.sched.partition flag Waiman Long
2018-11-06 11:35   ` Peter Zijlstra
2018-10-15 20:29 ` [PATCH v14 05/12] cpuset: Add an error state to cpuset.sched.partition Waiman Long
2018-11-06 11:37   ` Peter Zijlstra
2018-11-06 14:17     ` Waiman Long
2018-11-06 11:40   ` Peter Zijlstra
2018-11-07 23:13     ` Waiman Long
2018-11-06 11:40   ` Peter Zijlstra
2018-10-15 20:29 ` [PATCH v14 06/12] cpuset: Track cpusets that use parent's effective_cpus Waiman Long
2018-10-15 20:29 ` [PATCH v14 07/12] cpuset: Make CPU hotplug work with partition Waiman Long
2018-10-15 20:29 ` [PATCH v14 08/12] cpuset: Make generate_sched_domains() " Waiman Long
2018-10-15 20:29 ` Waiman Long [this message]
2018-10-15 20:29 ` [PATCH v14 10/12] cpuset: Add documentation about the new "cpuset.sched.partition" flag Waiman Long
2018-11-06 11:50   ` Peter Zijlstra
2018-11-06 14:09     ` Waiman Long
2018-11-07 22:58     ` Waiman Long
2018-10-15 20:29 ` [PATCH v14 11/12] cpuset: Expose cpuset.cpus.subpartitions with cgroup_debug Waiman Long
2018-10-15 20:29 ` [PATCH v14 12/12] cpuset: Show descriptive text when reading cpuset.sched.partition Waiman Long
2018-10-17 15:08   ` Tejun Heo
2018-10-17 15:20     ` Waiman Long
2018-10-19 18:56     ` Waiman Long
2018-10-19 19:24       ` Tejun Heo
2018-10-19 19:32         ` Waiman Long
2018-11-02 14:34         ` Waiman Long
2018-11-06 11:52   ` Peter Zijlstra
2018-11-05 16:36 ` [PATCH v14 00/12] Enable cpuset controller in default hierarchy Tejun Heo
2018-11-05 16:57   ` Peter Zijlstra
2018-11-06 11:53   ` Peter Zijlstra
2018-11-06 11:55     ` Peter Zijlstra
2018-11-06 14:06       ` Waiman Long
     [not found]         ` <CAOS58YPye=7Ga+y-ujFsgHqo6vdVnjykmON1z+UjNQLvvM_g4w@mail.gmail.com>
2018-11-06 14:11           ` Tejun Heo
2018-11-07 21:32         ` Tejun Heo
2018-11-07 21:52           ` Waiman Long
2018-11-08  9:41           ` Peter Zijlstra

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