From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>, Zefan Li <lizefan.x@bytedance.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
"Andrew Morton" <akpm@linux-foundation.org>,
"Roman Gushchin" <guro@fb.com>, "Phil Auld" <pauld@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Michal Koutný" <mkoutny@suse.com>,
"Waiman Long" <longman@redhat.com>
Subject: [PATCH-cgroup v4 0/6] cgroup/cpuset: Add new cpuset partition type & empty effecitve cpus
Date: Tue, 10 Aug 2021 23:06:01 -0400 [thread overview]
Message-ID: <20210811030607.13824-1-longman@redhat.com> (raw)
v4:
- Rebased to the for-5.15 branch of cgroup git tree and dropped the
first 3 patches of v3 series which have been merged.
- Beside prohibiting violation of cpu exclusivity rule, allow arbitrary
changes to cpuset.cpus of a partition root and force the partition root
to become invalid in case any of the partition root constraints
are violated. The documentation file and self test are modified
accordingly.
v3:
- Add two new patches (patches 2 & 3) to fix bugs found during the
testing process.
- Add a new patch to enable inotify event notification when partition
become invalid.
- Add a test to test event notification when partition become invalid.
v2:
- Drop v1 patch 1.
- Break out some cosmetic changes into a separate patch (patch #1).
- Add a new patch to clarify the transition to invalid partition root
is mainly caused by hotplug events.
- Enhance the partition root state test including CPU online/offline
behavior and fix issues found by the test.
This patchset makes four enhancements to the cpuset v2 code.
Patch 1: Enable event notification on "cpuset.cpus.partition" whenever
the state of a partition changes.
Patch 2: Properly handle partition root tree and make partition
invalid in case changes to cpuset.cpus violate any of the partition
root constraints.
Patch 3: Add a new partition state "isolated" to create a partition
root without load balancing. This is for handling intermitten workloads
that have a strict low latency requirement.
Patch 4: Allow partition roots that are not the top cpuset to distribute
all its cpus to child partitions as long as there is no task associated
with that partition root. This allows more flexibility for middleware
to manage multiple partitions.
Patch 5 updates the cgroup-v2.rst file accordingly. Patch 6 adds a new
cpuset test to test the new cpuset partition code.
Waiman Long (6):
cgroup/cpuset: Enable event notification when partition state changes
cgroup/cpuset: Properly handle partition root tree
cgroup/cpuset: Add a new isolated cpus.partition type
cgroup/cpuset: Allow non-top parent partition root to distribute out
all CPUs
cgroup/cpuset: Update description of cpuset.cpus.partition in
cgroup-v2.rst
kselftest/cgroup: Add cpuset v2 partition root state test
Documentation/admin-guide/cgroup-v2.rst | 104 +--
kernel/cgroup/cpuset.c | 282 +++++---
tools/testing/selftests/cgroup/Makefile | 5 +-
.../selftests/cgroup/test_cpuset_prs.sh | 632 ++++++++++++++++++
tools/testing/selftests/cgroup/wait_inotify.c | 86 +++
5 files changed, 980 insertions(+), 129 deletions(-)
create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh
create mode 100644 tools/testing/selftests/cgroup/wait_inotify.c
--
2.18.1
next reply other threads:[~2021-08-11 3:06 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-11 3:06 Waiman Long [this message]
2021-08-11 3:06 ` [PATCH v4 1/6] cgroup/cpuset: Enable event notification when partition state changes Waiman Long
2021-08-11 3:06 ` Waiman Long
2021-08-11 18:04 ` Tejun Heo
2021-08-11 18:04 ` Tejun Heo
2021-08-11 3:06 ` [PATCH v4 2/6] cgroup/cpuset: Properly handle partition root tree Waiman Long
2021-08-11 18:08 ` Tejun Heo
2021-08-11 19:27 ` Waiman Long
2021-08-11 19:27 ` Waiman Long
2021-08-12 22:18 ` Tejun Heo
2021-08-12 22:18 ` Tejun Heo
2021-08-12 22:56 ` Waiman Long
2021-08-12 22:56 ` Waiman Long
2021-08-13 16:07 ` Tejun Heo
2021-08-11 3:06 ` [PATCH v4 3/6] cgroup/cpuset: Add a new isolated cpus.partition type Waiman Long
2021-08-11 3:06 ` [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs Waiman Long
2021-08-11 18:13 ` Tejun Heo
2021-08-11 18:13 ` Tejun Heo
2021-08-11 18:18 ` Waiman Long
2021-08-11 18:21 ` Tejun Heo
2021-08-11 18:21 ` Tejun Heo
2021-08-11 18:46 ` Waiman Long
2021-08-11 18:46 ` Waiman Long
2021-08-12 21:51 ` Tejun Heo
2021-08-12 21:51 ` Tejun Heo
2021-08-11 3:06 ` [PATCH v4 5/6] cgroup/cpuset: Update description of cpuset.cpus.partition in cgroup-v2.rst Waiman Long
2021-08-11 18:15 ` Tejun Heo
2021-08-11 18:19 ` Waiman Long
2021-08-11 18:19 ` Waiman Long
2021-08-11 3:06 ` [PATCH v4 6/6] kselftest/cgroup: Add cpuset v2 partition root state test Waiman Long
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210811030607.13824-1-longman@redhat.com \
--to=longman@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=cgroups@vger.kernel.org \
--cc=corbet@lwn.net \
--cc=frederic@kernel.org \
--cc=guro@fb.com \
--cc=hannes@cmpxchg.org \
--cc=juri.lelli@redhat.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=lizefan.x@bytedance.com \
--cc=mkoutny@suse.com \
--cc=mtosatti@redhat.com \
--cc=pauld@redhat.com \
--cc=peterz@infradead.org \
--cc=shuah@kernel.org \
--cc=tj@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.