Re: [PATCH RFC 0/3] Improve stability of system clock

From: Miroslav Lichvar
Date: Wed May 17 2017 - 13:22:30 EST

On Wed, May 17, 2017 at 10:02:00AM -0700, John Stultz wrote:
> On Wed, May 17, 2017 at 9:57 AM, Miroslav Lichvar <mlichvar@xxxxxxxxxx> wrote:
> > On Wed, May 17, 2017 at 09:30:31AM -0700, John Stultz wrote:
> >> Could you submit your linux-tktest infrastructure to the kselftests dir?
> >
> > I can, but it's a mess that breaks frequently as the timekeeping and
> > other kernel code changes. Are you sure you want that in the kernel
> > tree? :)
> Being a mess is a slight concern, but as for breaking, if its
> in-kernel, then folks can't make changes that break it, right?

It duplicates/stubs quite a few kernel functions that are needed to
compile and link the timekeeping.c file into an executable. See
linux-tktest/missing.c. If their signature changes, or new functions
are needed, it will break.

Is there a better way to run the timekeeping code in an userspace
application? I suspect it would need something like the Linux Kernel
Library project.

Miroslav Lichvar