linux-kernel - Re: Clock has stopped (time/date looping over 5 secon

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Message-ID: <1f1b08da0804161020x7335e58qae9a237da83cb93b@mail.gmail.com>
Date:	Wed, 16 Apr 2008 10:20:25 -0700
From:	"john stultz" <johnstul@...ibm.com>
To:	Roland <devzero@....de>
Cc:	rogerheflin@...il.com, joel.greene@...apult.com,
	linux-kernel@...r.kernel.org, pavel@....cz
Subject: Re: Clock has stopped (time/date looping over 5 secon

On Tue, Apr 8, 2008 at 2:47 PM, Roland <devzero@....de> wrote:
> > It _appears_ that there is a race in the kernel that can be triggered by
> > any number of hardware issues. There's another thread by Gregory Stark
> > with the same symptoms - he thinks his was fixed by replacing a bad
> > DIMM.
> >
>
>  i`d like to mention that we may have a repro-case (if it`s the same issue i
> hit within vmware):
>
>  see http://communities.vmware.com/message/909403

The looping ~5seconds sounds like nanosecond overflows. Might it be
that vmware isn't delivering timer interrupts? Could this be an
interaction w/ hrt or no_hz?

thanks
-john
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