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-rw-r--r--README23
1 files changed, 15 insertions, 8 deletions
diff --git a/README b/README
index 420276eda8..06c54e04d7 100644
--- a/README
+++ b/README
@@ -30,14 +30,21 @@ LICENSE:
LGPL-2.1-or-later for all code, exceptions noted in LICENSES/README.md
REQUIREMENTS:
- Linux kernel >= 3.15
- Linux kernel >= 4.2 for unified cgroup hierarchy support
- Linux kernel >= 4.10 for cgroup-bpf egress and ingress hooks
- Linux kernel >= 4.15 for cgroup-bpf device hook
- Linux kernel >= 4.17 for cgroup-bpf socket address hooks
- Linux kernel >= 5.3 for bounded-loops in BPF program
- Linux kernel >= 5.4 for signed Verity images support
- Linux kernel >= 5.7 for BPF links and the BPF LSM hook
+ Linux kernel ≥ 3.15
+ ≥ 4.5 for pids controller in cgroup v2
+ ≥ 4.6 for cgroup namespaces
+ ≥ 4.9 for RENAME_NOREPLACE support in vfat
+ ≥ 4.10 for cgroup-bpf egress and ingress hooks
+ ≥ 4.15 for cgroup-bpf device hook and cpu controller in cgroup v2
+ ≥ 4.17 for cgroup-bpf socket address hooks
+ ≥ 5.3 for bounded loops in BPF program
+ ≥ 5.4 for signed Verity images
+ ≥ 5.7 for BPF links and the BPF LSM hook
+
+ Kernel versions below 4.15 have significant gaps in functionality and
+ are not recommended for use with this version of systemd. Taint flag
+ 'old-kernel' will be set. Systemd will most likely still function, but
+ upstream support and testing are limited.
Kernel Config Options:
CONFIG_DEVTMPFS