Public bug reported:
The postgresql profile is trying to use debugfs, and that is denied in
secure boot mode:
2025-01-03 23:56:13,553 ERROR tuned.utils.commands: Error when reading file
'/sys/kernel/deb
ug/sched/min_granularity_ns': '[Errno 2] No such file or directory:
'/sys/kernel/debug/sched/mi
n_granularity_ns''
2025-01-03 23:56:13,553 ERROR tuned.plugins.plugin_scheduler: Error reading
'min_granularity
_ns'
2025-01-03 23:56:13,554 ERROR tuned.plugins.plugin_scheduler: This may not
work with Secure
Boot or kernel_lockdown (this hint is logged only once)
And dmesg:
[ 479.574270] Lockdown: tuned: debugfs access is restricted; see man
kernel_lockdown.7
This breaks the DEP8 test tuned-vm, which selected the postgresql
profile to apply (for no particular reason was postgresql selected).
** Affects: tuned (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2092966
Title:
postgresql profile does not apply in secure boot mode
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