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>,
Waiman Long <longman@redhat.com>
Subject: [PATCH v10 7/9] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root
Date: Mon, 18 Jun 2018 12:14:07 +0800 [thread overview]
Message-ID: <1529295249-5207-9-git-send-email-longman@redhat.com> (raw)
In-Reply-To: <1529295249-5207-1-git-send-email-longman@redhat.com>
Because of the fact that setting the "cpuset.sched.domain_root" 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 6ef3516..c2b61e1 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1529,7 +1529,7 @@ 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
@@ -1569,7 +1569,7 @@ 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 ea640ce..b609795 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2225,14 +2225,12 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft)
.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,
},
{
--
1.8.3.1
next prev parent reply other threads:[~2018-06-18 4:15 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-18 4:13 [PATCH v10 0/9] cpuset: Enable cpuset controller in default hierarchy Waiman Long
2018-06-18 4:14 ` [PATCH v10 1/9] " Waiman Long
2018-06-18 4:14 ` [PATCH v10 2/9] cpuset: Add new v2 cpuset.sched.domain_root flag Waiman Long
2018-06-20 14:27 ` Peter Zijlstra
2018-06-21 7:58 ` Waiman Long
2018-06-21 8:05 ` Waiman Long
2018-06-21 9:20 ` Peter Zijlstra
2018-06-22 3:00 ` Waiman Long
2018-07-02 16:32 ` Tejun Heo
2018-06-21 9:27 ` Peter Zijlstra
2018-06-22 2:48 ` Waiman Long
2018-06-18 4:14 ` [PATCH v10 3/9] cpuset: Simulate auto-off of sched.domain_root at cgroup removal Waiman Long
2018-06-20 14:11 ` Peter Zijlstra
2018-06-21 8:22 ` Waiman Long
2018-06-18 4:14 ` [PATCH v10 4/9] cpuset: Allow changes to cpus in a domain root Waiman Long
2018-06-18 4:14 ` [PATCH v10 5/9] cpuset: Make sure that domain roots work properly with CPU hotplug Waiman Long
2018-06-20 14:15 ` Peter Zijlstra
2018-06-21 3:09 ` Waiman Long
2018-06-18 4:14 ` [PATCH v10 6/9] cpuset: Make generate_sched_domains() recognize isolated_cpus Waiman Long
2018-06-18 14:44 ` Waiman Long
2018-06-18 14:58 ` Juri Lelli
2018-06-18 4:14 ` [PATCH v10 6/9] cpuset: Make generate_sched_domains() recognize reserved_cpus Waiman Long
2018-06-20 14:17 ` Peter Zijlstra
2018-06-21 8:14 ` Waiman Long
2018-06-18 4:14 ` Waiman Long [this message]
2018-06-18 4:14 ` [PATCH v10 8/9] cpuset: Don't rebuild sched domains if cpu changes in non-domain root Waiman Long
2018-06-18 4:14 ` [PATCH v10 9/9] cpuset: Allow reporting of sched domain generation info Waiman Long
2018-06-20 14:20 ` Peter Zijlstra
2018-06-18 14:20 ` [PATCH v10 0/9] cpuset: Enable cpuset controller in default hierarchy Juri Lelli
2018-06-18 15:07 ` Waiman Long
2018-06-19 9:52 ` Juri Lelli
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