Re: [Xen-devel] Nested virt broken in Linux 4.9 (was Re: [OSSTEST PATCH 2/3] ap-common: Switch to Linux 4.9 by default [and 1 more messages])

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

Boris Ostrovsky writes ("Re: Nested virt broken in Linux 4.9 (was Re: [OSSTEST 
PATCH 2/3] ap-common: Switch to Linux 4.9 by default [and 1 more messages])"):
> On 05/30/2017 10:28 AM, Ian Jackson wrote:
> > osstest service owner writes ("[osstest test] 109837: regressions - FAIL"):
> >> Tests which did not succeed and are blocking,
> >> including tests which could not be run:
> >>  test-amd64-amd64-qemuu-nested-amd 13 xen-boot/l1   fail REGR. vs. 109601
> >>  test-amd64-amd64-qemuu-nested-intel 13 xen-boot/l1 fail REGR. vs. 109601
> > The L1 console log is here:
...
> The test is using 4.9.21 kernel and it looks like the patch that fixed
> earlier regression shows up in 4.9 tree at 4.9.28 (commit
> 5d7ab8339a9a9e745c672279437657654268be81).

Thanks for investigating.  osstest tries to to track 4.9.y.

However, it is blocked because of persistent failures like this one:

osstest service owner writes ("[linux-4.9 test] 109836: regressions - trouble: 
broken/fail/pass"):
> flight 109836 linux-4.9 real [real]
> http://logs.test-lab.xenproject.org/osstest/logs/109836/
> 
> Regressions :-(
> 
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  test-armhf-armhf-xl-credit2   6 xen-boot          fail REGR. vs. 107358

Does anyone have any idea why this test should fail consistently ?
The corresponding test with the default credit1 scheduler fails too.
But it works on the other branches (which are using linux 3.18):
  
http://logs.test-lab.xenproject.org/osstest/results/history/test-armhf-armhf-xl/ALL
  
http://logs.test-lab.xenproject.org/osstest/results/history/test-armhf-armhf-xl-credit2/ALL

These are, admittedly, on the unreliable arndales, but:
  
http://logs.test-lab.xenproject.org/osstest/results/host/arndale-bluewater.html

So I think this is a problem with 4.9.

Ian.

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