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-rw-r--r--README13
1 files changed, 9 insertions, 4 deletions
diff --git a/README b/README
index 4f9fcc7170..c465c3288f 100644
--- a/README
+++ b/README
@@ -43,10 +43,15 @@ REQUIREMENTS:
≥ 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 versions below 3.15 ("minimum baseline") are not supported at
+ all, and are missing required functionality (e.g. CLOCK_BOOTIME support
+ for timerfd_create()).
+
+ ⚠️ Kernel versions below 4.15 ("recommended baseline") have significant
+ gaps in functionality and are not recommended for use with this version
+ of systemd (e.g. sufficiently comprehensive and working cgroupv2
+ support). 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