Kernel boot up spends long time at "Received client request to flush runtime journal"

[ChinoLuo]

hello,
kernel 5.10.104 boot up spends almost 10 seconds at “systemd-journald[373]: Received client request to flush runtime journal.”

compare with kernel 5.10.209, the time is in 1 seconds

Is there a way to shorten this time at kernel-5.10.104?

[kayccc]

Which SW you’re using?
Custom board or devkit?
Any peripheral connecting on devce?

[ChinoLuo]

Which SW you’re using?

Ubuntu 20.04, jetpack 5.1.5

Custom board or devkit?

devkit

Any peripheral connecting on devce?

only hdmi and ethernet

same sw and hw conditions

we also try install jetpack 5.0.2, has the same result.

[ChinoLuo]

does RT kernel delay the boot time?

[ChinoLuo]

We solved this issue:
Disable preempt rt option at kernel profile…