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Re: [Xen-devel] Please apply "partially revert "xen: Remove event channel..."



On Fri, 7 Apr 2017, Boris Ostrovsky wrote:
> On 04/07/2017 01:36 PM, Stefano Stabellini wrote:
> > 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?
> 
> Is there anything that needs to be done beyond just applying it to 4.9
> (4.10 apparently already has it).

No, I don't think so. 4.9 already has the offending commit.

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