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Message-ID: <20240827062111.580296-1-chenridong@huawei.com>
Date: Tue, 27 Aug 2024 06:20:59 +0000
From: Chen Ridong <chenridong@...wei.com>
To: <tj@...nel.org>, <lizefan.x@...edance.com>, <hannes@...xchg.org>,
<longman@...hat.com>, <adityakali@...gle.com>, <sergeh@...nel.org>,
<mkoutny@...e.com>
CC: <cgroups@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 -next 00/12] cgroup:cpuset:separate legacy cgroup v1 code and put under config option
Cgroups v2 have been around for a while and many users have fully adopted
them, so they never use cgroups v1 features and functionality. Yet they
have to "pay" for the cgroup v1 support anyway:
1) the kernel binary contains an unused cgroup v1 code,
2) some code paths have additional checks which are not needed,
3) some common structures like task_struct and mem_cgroup contain unused
cgroup v1-specific members.
Cgroup memory controller has already separated legacy code to
memory-v1.c. So it is time to do the same thing for cpuset controller.
This patchset aims to do:
1) moving cgroup v1-specific cpuset code to the new cpuset-v1.c file,
2) putting definitions shared by cpuset.c and cpuset-v1.c into the
cpuset-internal.h header,
3) introducing the CONFIG_CPUSETS_V1 config option, turned off by default,
4) making cpuset-v1.c to compile only if CONFIG_CPUSETS_V1 is set.
---
V3:
- Delete blank line at the end of file.
- Rename some generic functions name with cpuset_/cpuset1_ prefix.
V2:
- Update to base on the latest cgroup/for-6.12.
- Add CONFIG_CPUSETS_V1 for cpuset_memory_pressure_bump.
Chen Ridong (12):
cgroup/cpuset: introduce cpuset-v1.c
cgroup/cpuset: move common code to cpuset-internal.h
cgroup/cpuset: move memory_pressure to cpuset-v1.c
cgroup/cpuset: move relax_domain_level to cpuset-v1.c
cgroup/cpuset: move memory_spread to cpuset-v1.c
cgroup/cpuset: add callback_lock helper
cgroup/cpuset: move legacy hotplug update to cpuset-v1.c
cgroup/cpuset: move validate_change_legacy to cpuset-v1.c
cgroup/cpuset: move v1 interfaces to cpuset-v1.c
cgroup/cpuset: rename functions shared between v1 and v2
cgroup/cpuset: guard cpuset-v1 code under CONFIG_CPUSETS_V1
cgroup/cpuset: add sefltest for cpuset v1
MAINTAINERS | 3 +
include/linux/cpuset.h | 4 +
init/Kconfig | 13 +
kernel/cgroup/Makefile | 1 +
kernel/cgroup/cpuset-internal.h | 304 ++++++
kernel/cgroup/cpuset-v1.c | 562 +++++++++++
kernel/cgroup/cpuset.c | 908 +-----------------
.../selftests/cgroup/test_cpuset_v1_base.sh | 77 ++
8 files changed, 1013 insertions(+), 859 deletions(-)
create mode 100644 kernel/cgroup/cpuset-internal.h
create mode 100644 kernel/cgroup/cpuset-v1.c
create mode 100755 tools/testing/selftests/cgroup/test_cpuset_v1_base.sh
--
2.34.1
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