Re: [PATCH *] use 64 bit jiffies

Tim Schmielau
2003-02-04T12:50:55Z

On Mon, 3 Feb 2003, Matti Aarnio wrote:

> On Mon, Feb 03, 2003 at 09:47:00AM +0100, Tim Schmielau wrote:
> > On Mon, 3 Feb 2003, Matti Aarnio wrote:
> > > I do have a number of machines with 100 to 300 day uptimes, all
> > > with "mere" 32-bit jiffy. With 1000 Hz clock that means at least
> > > one full wrap-around of jiffy.
> >
> > Are these 2.5 machines? If so I'd really like to know whether or not
> > ps shows old processes as having started in the future.
> > With a simulated uptime it does, but I might have overlooked something.
>
> 300 day uptime with 2.5 ? Do think again.

Well, 100 days of uptime could be around 2.5.40.

>
> These are 2.4 series kernels. 2.4.17, 2.4.18, 2.4.20
>
> With updated 'ps' tools the processes are definitely in the past,
> although seeing mere "2002" does not tell all that detailed about
> "when". A "apr17" would be more usefull. Any date in "future"
> means it is of previous year.

Ok, so on these machines jifies haven't wrapped yet (if you haven't
changed HZ).
Thanks anyways,

Tim