libct/cgroups/systemd: don't set limits in Apply #2814
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All cgroup managers has Apply() and Set() methods: - Apply is used to create a cgroup (and, in case of systemd, a systemd unit) and/or put a PID into the cgroup (and unit); - Set is used to set various cgroup resources and limits. The fs/fs2 cgroup manager implements the functionality as described above. The systemd v1/v2 manager deviate -- it sets *most* of cgroup limits (those that can be projected to systemd unit properties) in Apply(), and then again *all* cgroup limits in Set (first indirectly via systemd properties -- same as in Apply, then via cgroupfs). This commit removes setting the cgroup limits from Apply, so now the systemd manager behaves the same way as the fs manager. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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I wanted to fix it half a year ago but did not quite understand the purpose of Apply and Set at the time. |
odinuge
approved these changes
Feb 22, 2021
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@AkihiroSuda I would not call this a refactor -- this is a bug fix (#2813), although I agree the bug is kinda subtle. |
dqminh
approved these changes
Feb 23, 2021
mrunalp
approved these changes
Feb 23, 2021
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All cgroup managers has Apply() and Set() methods:
Apply is used to create a cgroup (and, in case of systemd,
a systemd unit) and/or put a PID into the cgroup (and unit);
Set is used to set various cgroup resources and limits.
The fs/fs2 cgroup manager implements the functionality as described above.
The systemd v1/v2 manager deviate -- it sets most of cgroup limits
(those that can be projected to systemd unit properties) in Apply(),
and then again all cgroup limits in Set (first indirectly via systemd
properties -- same as in Apply, then via cgroupfs).
This commit removes setting the cgroup limits from Apply,
so now the systemd manager behaves the same way as the fs manager.
Fixes: #2813