Re: [OT] Major Clock Drift

From: Andrew Morton (
Date: Sun Feb 11 2001 - 06:47:41 EST

Pavel Machek wrote:
> > > Vesafb is happy to block interrupts for half a second.
> >
> > And has this been observed to cause clock drift?
> YEs. I've seen time running 3 times slower. Just do cat /etc/termcap
> with loaded PCI bus. Yesterday I lost 20 minutes during 2 hours -- I
> have been using USB (load PCI) and framebuffer.

That's not good. Very not good.

James Simmons has been looking into using something other
than spin_lock_irq(console_lock) to provide the
serialisation which these drivers need. Apparently
it got messy. I'm interested in getting involved
with this problem as well. Sounds like it may not be
2.4 stuff though.

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

This archive was generated by hypermail 2b29 : Thu Feb 15 2001 - 21:00:16 EST