Re: [Xen-devel] [xen-unstable test] 13677: regressions - FAIL

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2012-09-12 at 11:12 +0100, Ian Campbell wrote:
> On Wed, 2012-09-12 at 11:08 +0100, Jan Beulich wrote:
> > > Is it outside the realms of possibility that the guest has managed to
> > > limp along with the RTC being broken in some subtle way and only
> > > eventually trips up when we come to shut down?
> > 
> > That's certainly not impossible, but afaik Linux doesn't play with
> > the RTC unless told to by user space
> 
> I did wonder about an /etc/init.d/hwclock type thing, but I think that
> would have run much earlier than this point.
> 
> >  (whereas Windows, as we
> > know from the reporter of the problem that triggered putting
> > together these changes, does on its own at least under certain
> > circumstances, yet the Windows tests all go through fine).
> > 
> > Certainly this is the most likely candidate for having broken
> > something, and hence would be the prime candidate for reverting.
> > But before doing so, I'd want to see at least another run's results.
> 
> Ack. I'm installing a RHEL6.1 HVM guest anyway, since it's handy to have
> one in my pocket.

25876:35fa512c60b2 "gnttab: cleanup of number-of-active-frames
calculations" for both => hangs:
        Syncing hardware clock to system time [  OK  ]
        Turning off swap:  [  OK  ]
        Unmounting file systems:  [  OK  ]
        init: Re-executing /sbin/init
        <silence>

Reverting just 25843:51090fe1ab97 "x86/HVM: assorted RTC emulation
adjustments" on top of 35fa... => works again.

Ian.



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