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

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

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

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