Re: How to move serial8250_init out of the critical path to decrease boot time?

On Sun, Apr 01, 2018 at 09:11:15AM +0200, Paul Menzel wrote: > Dear Linux folks, > > > The goal is to boot a *distribution* Linux kernel as fast as possible. (The > goal is currently 500 ms.) What distro? > With Linux 4.16-rc7, `serial8250_init()` takes almost 34 ms according to > `initcall_deb

How to move serial8250_init out of the critical path to decrease boot time?

Dear Linux folks, The goal is to boot a *distribution* Linux kernel as fast as possible. (The goal is currently 500 ms.) With Linux 4.16-rc7, `serial8250_init()` takes almost 34 ms according to `initcall_debug` on the laptop TUXEDO Book BU1406 with an Intel Kaby Lake processor. ``` [2