On Mon, Dec 04, 2023 at 06:59:31PM +0000, Gleb Smirnoff wrote:
> The branch main has been updated by glebius:
>
> URL:
> https://cgit.FreeBSD.org/src/commit/?id=e3cbc572f1541fdc18be9971d23e210d5018e662
>
> commit e3cbc572f1541fdc18be9971d23e210d5018e662
> Author: Gleb Smirnoff <[email protected]>
> AuthorDate: 2023-12-04 18:19:46 +0000
> Commit: Gleb Smirnoff <[email protected]>
> CommitDate: 2023-12-04 18:19:46 +0000
>
> kern/subr_trap.c: repair the HPTS performance hack in userret()
>
> It wasn't functional as subr_trap.c doesn't include opt_inet.h. Put a
> better comment provided by gallatin@ in place of the old one. The idea
> is to use userret() as a cheap place to call a soft clock. This approach
> saves CPU on busy machines and saves power on idle machines.
> An alternative would be to constantly schedule callouts. Running with
> neither callouts nor the soft clock ruins HPTS precision.
Can this be converted to AST, and scheduled as needed, instead of current
ugliness?
