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/core/unit.c | |
| 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/core/unit.c')
| -rw-r--r-- | src/core/unit.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/core/unit.c b/src/core/unit.c index ff7c562fba..952604e0db 100644 --- a/src/core/unit.c +++ b/src/core/unit.c @@ -2608,7 +2608,7 @@ int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); unit_serialize_item(u, f, "transient", yes_no(u->transient)); - unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); + unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); if (u->cgroup_path) unit_serialize_item(u, f, "cgroup", u->cgroup_path); @@ -2824,9 +2824,9 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { continue; - } else if (streq(l, "cpuacct-usage-base")) { + } else if (streq(l, "cpu-usage-base") || streq(l, "cpuacct-usage-base")) { - r = safe_atou64(v, &u->cpuacct_usage_base); + r = safe_atou64(v, &u->cpu_usage_base); if (r < 0) log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |