Re: [RFC][PATCH] new timeofday arch specific hooks (v. A3)

From: john stultz
Date: Mon Mar 14 2005 - 13:19:27 EST

On Sat, 2005-03-12 at 16:52 +1100, Benjamin Herrenschmidt wrote:
> On Fri, 2005-03-11 at 17:25 -0800, john stultz wrote:
> > All,
> > This patch implements the minimal architecture specific hooks to enable
> > the new time of day subsystem code for i386, x86-64, ia64, ppc32 and
> > ppc64. It applies on top of my linux-2.6.11_timeofday-core_A3 patch and
> > with this patch applied, you can test the new time of day subsystem.
> >
> > Basically it configs in the NEWTOD code and cuts alot of code out of the
> > build via #ifdefs. I know, I know, #ifdefs' are ugly and bad, and the
> > final patch will just remove the old code. For now this allows us to be
> > flexible and easily switch between the two implementations with a single
> > define.
> >
> > New in this version:
> > o ppc32 arch code (by Darrick Wong. Many thanks to him for this code!)
> > o ia64 arch code (by Max Asbock. Many thanks to him for this code!)
> > o minor cleanups moving code between the arch and timesource patches
> >
> > Items still on the TODO list:
> > o s390 arch port (hey Martin: nudge, nudge :)
> > o arch specific vsyscall/fsyscall interface
> > o other arch ports (volunteers wanted!)
> I'm not what the impact will be with the vDSO implementation of
> gettimeofday which relies on the bits in systemcfg (tb_to_xs etc...).

Oh yea, the vDSO stuff slipped in after I last tested the ppc64 bits, so
I wouldn't be surprised if that's broken. For now I'm just disabling the
vsyscall/fsyscall/vDSO bits on the arches that support it until I get a
generic interface setup that would allow it to be consistent with the
new time infrastructure. Hopefully I'll have that done (I'm targeting
x86-64 atleast) by the next release.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at