RFC: 405LP sleep

Tom Rini trini at kernel.crashing.org
Tue Dec 24 02:03:42 EST 2002

On Fri, Dec 20, 2002 at 05:31:14PM -0600, Hollis Blanchard wrote:

> On Thu, 2002-12-19 at 15:36, Todd Poynor wrote:
> > +       jiffies += rtc_secs_elapsed * HZ;
> >
> > If jiffies is jumped forward then can kernel events (such as those
> > waiting on a kernel timer) be missed?
> I certainly *hope* the check is >= rather than == ... :)

They all should in fact be using time_after(...) or so, to deal
correctly with a jiffies wrap.  But from what I recall of doing a
massive kick of the jiffies (to test some jiffies wrap thing) in early
2.4 I believe, things can become somewhat unhappy.  Think of a device
which happens to be 'sleeping' while the user is on vacation or so.

Tom Rini (TR1265)

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