Re: [Xen-devel] Linux 3.18 no longer boots under Xen, please fix

[Juergen Gross <jgross@xxxxxxxx>]

On 20/05/2019 12:46, Ian Jackson wrote:
> This has been true for some time.  osstest has been sending automatic
> mails including bisection reports like the one below, for about a
> month.
> 
> osstest's "tested and good" branch of linux-3.18 is 190 days behind
> the upstream tip.
> 
> Do we care about this at all ?
> 
> Note that the Xen Project does not have a dedicated team of QA
> engineers who do triage of test reports.  It is up to every maintainer
> of every Xen-related component to keep an eye on these test reports
> and investigate failures.
> 
> For the avoidance of any doubt, osstest's "bisection complete" reports
> can always be relied on to accurately identify a real, repeatable,
> regression.  osstest will only make such a report if it has reproduced
> several times both the failure at the commit it blames, and the
> success at the commit it says is OK.  (In trees with a lot of merging,
> the commit that is blamed is sadly often a merge, but one of its
> parents will be identified as good.)
> 
> In this case osstest has sent a significant number of functionally
> identical reports saying it has identified a regression in lots of
> different tests.  But this has not resulted in any action AFAIAA.
> 
> Please would someone involved with the Linux kernel end of things pick
> this up.
> 
> Thanks,
> Ian.
> 
> osstest service owner writes ("[linux-3.18 bisection] complete 
> test-amd64-amd64-xl"):
>> branch xen-unstable
>> xenbranch xen-unstable
>> job test-amd64-amd64-xl
>> testid xen-boot
>>
>> Tree: linux 
>> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
>> Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
>> Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git
>> Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
>> Tree: qemuu git://xenbits.xen.org/qemu-xen.git
>> Tree: xen git://xenbits.xen.org/xen.git
>>
>> *** Found and reproduced problem changeset ***
>>
>>   Bug is in tree:  linux 
>> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
>>   Bug introduced:  6b1ae527b1fdee86e81da0cb26ced75731c6c0fa

That was the commit for 3.18.140

>>   Bug not present: ba6984fc0162f24a510ebc34e881b546b69c553b

and that the one for 3.18.121

There are 1352 commits between the two commits. A bisector telling me
such a result is next to useless.

Not sure when I'll be able to pick it up.


Juergen


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