Re: [Xen-devel] [xen-4.6-testing test] 62015: regressions - FAIL

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Sep 17, 2015 at 06:44:05AM +0000, osstest service owner wrote:
> flight 62015 xen-4.6-testing real [real]
> http://logs.test-lab.xenproject.org/osstest/logs/62015/
> 
> Regressions :-(
> 
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  test-amd64-i386-xl-qemut-stubdom-debianhvm-amd64-xsm 9 debian-hvm-install 
> fail REGR. vs. 61745
> 

I think this test case is unreliable.  For example, it passed in 61745
(xen-4.6-staging) but failed in 62012 (linux-3.14) while both had the
same version of Xen.

The history of this test case shows more failures than successes. It's
failing in all branches.

Nonetheless, to justify a force push, adequate analysis is required.

The list of commits between stable-4.6 and staging-4.6:

d892e956 x86/MSI: fail if no hardware support
70d63e48 x86/p2m: fix mismatched unlock
11d942df vtd/iommu: permit group devices to passthrough in relaxed mode

Irrelevant to failure.

da24ee8f xl: handle empty vnuma configuration
ed9926ec xl/libxl: disallow saving a guest with vNUMA configured
13f44615 libxc: introduce xc_domain_getvnuma
607dfbb1 libxl: format fd flags with 0x since they are hex.

Irrelevant to failure.

93a6ff88 x86/hvm: fix saved pmtimer and hpet values

This commit touches hpet_save function, which is only used to save HVM
guest. This is not related to failure because the failing test step is
debian-hvm-install which doesn't involve saving.

And the code it touches it not specific to stubdom. Other test cases
which involve saving hvm guest confirmed this change is either correct
or irrelevant (because the code path is not taken).

45761470 libxl: clear O_NONBLOCK|O_NDELAY on migration fd and reinstate 
afterwards

Tested in save / restore test case. Irrelevant to failure.

0b6d907c QEMU_TAG update
b0c5ff5e libxl: set ret to non-zero value in failure path
a4cebfd1 configure: don't silently disable systemd support
cb5599f7 Config.mk: Non-debug build by default.
33ad644b x86/VPMU: Set VPMU context pointer to NULL when freeing it
e7e711e4 efi: introduce efi_arch_flush_dcache_area
5af5c1ad Branch for 4.6: Document stable tree MAINTAINERS
ddd9d77e MAINTAINERS: stable backports should be requested on xen-devel
8d7fee3a Branch for 4.6: Update QEMU references

Irrelevant to failure.

I think a force push is justified.

Wei.

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