Time jumping on both 4.x and 5.x ...

Don Bowman don at sandvine.com
Sat Nov 29 08:36:00 PST 2003

From: Kris Kennaway [mailto:kris at obsecurity.org]
> On Sat, Nov 29, 2003 at 11:32:28AM +0100, Michael Nottebrock wrote:
> Content-Description: signed data
> > On Saturday 29 November 2003 09:19, Kris Kennaway wrote:
> > >
> > > Are all affected machines multi-processor?
> > 
> > None. Both are i386 UP (although the 4.9-RELEASE box is 
> running an SMP-enabled 
> > kernel).
> I didn't think 4.x SMP kernels could run on a UP machine.

They can if the machine has an APIC. ie most P3 and newer
boards will run a MP kernel even if only one processor
is installed.

For me, the bug reproduces on 4.7, and if I set
kern.timecounter.method=1, the problem goes away. I've
reproduced on both TSC and i8254.


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