Re: 2.6.21.5 june 30th to july 1st date hang?

Ernie Petrides
2007-07-05T23:15:01Z

On Thursday, 5-Jul-2007 at 16:49 MDT, Chris Friesen wrote:

> Ernie Petrides wrote:
>
> > Only kernels built with the CONFIG_HIGH_RES_TIMERS option enabled were
> > vulnerable.
>
> As I mentioned in my post to Thomas, we have high res timers disabled
> and were still affected. Granted, our kernel has been modified so it is
> possible that vanilla would not be affected....I haven't tested it.
>
> Chris

That's odd, because Thomas's patch removed two calls to clock_was_set(),
which is a no-op when CONFIG_HIGH_RES_TIMERS is not enabled (at least in
the 2.6.21 source tree).

Also, I personally tested with the reproducer you posted here, initially
on a box running 2.6.22-rc4, and there were no problems (but I'm not sure
what config options were enabled on that kernel). I did reproduce the
problem on a stock 2.6.21 kernel with CONFIG_HIGH_RES_TIMERS enabled.

Cheers. -ernie