Re: [BUG] jiffies counter leaps in 2.6.24-rc3

Stefano Brivio
2007-11-29T07:23:28Z

On Sat, 24 Nov 2007 20:31:25 +0100
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> On Saturday, 24 of November 2007, Stefano Brivio wrote:
> > On Sat, 24 Nov 2007 19:48:58 +0100
> > "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> >
> > > NO_HZ? Highres timers?
> >
> > CONFIG_HZ_1000=y
> > # CONFIG_HIGH_RES_TIMERS is not set
> >
> > > I understand that the previous kernels behave correctly. All of them?
> >
> > 2.6.21 behaved correctly. Sorry but git-bisect would take a lot of time
> > (I can't reliably reproduce the jiffies jump), so I would avoid that if
> > not strictly needed.
>
> Well, it would be good to know if 2.6.23 behaves correctly, at least.

Weird, it looks like I can't boot with 2.6.23.9 because of some issues with
dm-crypt (my root filesystem is encrypted). I double-checked the
configuration (which I just took from my current one), well, no way. Any
other test I can do?

In the meanwhile, I noted another thing: sometimes it happens that I become
root and the jiffies counter jumps ahead. Then, when I close any root
session, the jiffies counter jumps back to the correct value.

Please remember that this isn't just an aesthetic issue, as some drivers
(e.g. b43 and b43legacy, but I guess a lot more) rely on jiffies. Do I need
to file a bug to bugzilla.kernel.org? Thank you.

--
Ciao
Stefano