diff options
| author | Tejun Heo <htejun@fb.com> | 2016-08-07 09:45:39 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2016-08-07 09:45:39 -0400 |
| commit | 66ebf6c0a1005f90099e25ece5630551ad97a3c3 (patch) | |
| tree | d66af9b366845249937bf6b16025552e97ff25be /src/basic/cgroup-util.h | |
| parent | ceab9e2deee29dfda213a30c533c7dcd59c6bcad (diff) | |
core: add cgroup CPU controller support on the unified hierarchy
Unfortunately, due to the disagreements in the kernel development community,
CPU controller cgroup v2 support has not been merged and enabling it requires
applying two small out-of-tree kernel patches. The situation is explained in
the following documentation.
https://git.kernel.org/cgit/linux/kernel/git/tj/cgroup.git/tree/Documentation/cgroup-v2-cpu.txt?h=cgroup-v2-cpu
While it isn't clear what will happen with CPU controller cgroup v2 support,
there are critical features which are possible only on cgroup v2 such as
buffered write control making cgroup v2 essential for a lot of workloads. This
commit implements systemd CPU controller support on the unified hierarchy so
that users who choose to deploy CPU controller cgroup v2 support can easily
take advantage of it.
On the unified hierarchy, "cpu.weight" knob replaces "cpu.shares" and "cpu.max"
replaces "cpu.cfs_period_us" and "cpu.cfs_quota_us". [Startup]CPUWeight config
options are added with the usual compat translation. CPU quota settings remain
unchanged and apply to both legacy and unified hierarchies.
v2: - Error in man page corrected.
- CPU config application in cgroup_context_apply() refactored.
- CPU accounting now works on unified hierarchy.
Diffstat (limited to 'src/basic/cgroup-util.h')
| -rw-r--r-- | src/basic/cgroup-util.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/basic/cgroup-util.h b/src/basic/cgroup-util.h index ec5c715987..a509a1775c 100644 --- a/src/basic/cgroup-util.h +++ b/src/basic/cgroup-util.h @@ -169,6 +169,7 @@ int cg_create_and_attach(const char *controller, const char *path, pid_t pid); int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value); int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret); +int cg_get_keyed_attribute(const char *controller, const char *path, const char *attribute, const char **keys, char **values); int cg_set_group_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid); int cg_set_task_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid); |