Re: Please apply "partially revert "xen: Remove event channel..."

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On Fri, 7 Apr 2017, Boris Ostrovsky wrote:
> On 04/07/2017 07:58 AM, Ian Jackson wrote:
> > tl;dr:
> >  Please apply
> >
> >     da72ff5bfcb02c6ac8b169a7cf597a3c8e6c4de1
> >     partially revert "xen: Remove event channel notification through
> >       Xen PCI platform device"
> >
> >  to all stable branches which have a version of the original broken
> >  commit.  This includes at least 4.9.y.
> >
> > Background:
> >
> > osstest service owner writes ("[linux-4.9 baseline test] 107238: tolerable FAIL"):
> > ...
> >>  test-amd64-amd64-qemuu-nested-intel 13 xen-boot/l1  fail never pass
> > osstest doesn't consider this a regresion because it looks for
> > regressions within a branch, and this is the first test of Linux 4.9.
> > However, this is a regression from the kernel we are currently using.
> >
> > L1 dom0 console log:
> >   http://logs.test-lab.xenproject.org/osstest/logs/107238/test-amd64-amd64-qemuu-nested-intel/huxelrebe0---var-log-xen-osstest-serial-l1.guest.osstest.log
> >
> > It seems to have got stuck halfway through booting.
> >
> > The message
> >   (XEN) *** Serial input -> Xen (type 'CTRL-x' three times to switch input to DOM0)
> > shows where osstest timed out on this test, and started its log
> > capture process (including collecting debug key output).
> >
> > Complete logs for this job here:
> >   http://logs.test-lab.xenproject.org/osstest/logs/107238/test-amd64-amd64-qemuu-nested-intel/info.html
> >
> > Juergen Gross tells me that this is due to the lack of
> > da72ff5bfcb02c6ac8b169a7cf597a3c8e6c4de1.
> >
> > Thanks,
> > Ian.
> >
> > PS: Stefano, Boris: did you already request a backport of this commit?
> > If not, why not ?
> 
> No, but this should indeed be backported to 4.9+

Boris, are you going to do that?

While we wait for the kernel.org stable maintainers to do the backport,
would it help OSSTest if I backported
da72ff5bfcb02c6ac8b169a7cf597a3c8e6c4de1 to the linux-arm-xen branch
myself now?



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