Re: [Xen-devel] [xen-unstable test] 15452: regressions - FAIL

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sat, 2013-02-09 at 07:00 +0000, xen.org wrote:
> flight 15452 xen-unstable real [real]
> http://www.chiark.greenend.org.uk/~xensrcts/logs/15452/
> 
> Regressions :-(
> 
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  test-amd64-i386-xl-credit2   14 guest-localmigrate/x10    fail REGR. vs. 
> 15442
>  test-amd64-i386-xl-multivcpu 14 guest-localmigrate/x10    fail REGR. vs. 
> 15442
>  test-amd64-amd64-pv          14 guest-localmigrate/x10    fail REGR. vs. 
> 15442
>  test-amd64-i386-qemuu-rhel6hvm-intel 11 leak-check/check  fail REGR. vs. 
> 15442
>  test-amd64-i386-win          11 guest-localmigrate.2      fail REGR. vs. 
> 15442
>  test-amd64-i386-xend-qemut-winxpsp3 11 guest-localmigrate.2 fail REGR. vs. 
> 15442
>  test-amd64-i386-xl-qemut-win-vcpus1  7 windows-install    fail REGR. vs. 
> 15442
>  test-amd64-i386-qemut-win    11 guest-localmigrate.2      fail REGR. vs. 
> 15442
>  test-amd64-amd64-qemut-win    7 windows-install           fail REGR. vs. 
> 15442
>  test-amd64-i386-win-vcpus1    7 windows-install           fail REGR. vs. 
> 15442
>  test-amd64-amd64-win          7 windows-install           fail REGR. vs. 
> 15442

Of the windows install failures the xl one failed with:
        libxl: error: libxl.c:2101:device_disk_add: failed to get blktap 
devpath for 0x82ba7b0
        
        libxl: error: libxl_create.c:901:domcreate_launch_dm: unable to add 
disk devices
        libxl: error: libxl_dm.c:1229:libxl__destroy_device_model: could not 
find device-model's pid for dom 2
        libxl: error: libxl.c:1414:libxl__destroy_domid: 
libxl__destroy_device_model failed for 2
        Parsing config from /etc/xen/win.guest.osstest.cfg
        
The xend ones failed in every case with:
        [2013-02-09 00:11:38 2336] DEBUG (XendDomainInfo:2499)
        XendDomainInfo.constructDomain
        [2013-02-09 00:11:38 2336] ERROR (XendDomainInfo:488) VM start failed
        Traceback (most recent call last):
          File 
"/usr/local/lib/python2.6/dist-packages/xen/xend/XendDomainInfo.py", line 473, 
in start
            XendTask.log_progress(0, 30, self._constructDomain)
          File "/usr/local/lib/python2.6/dist-packages/xen/xend/XendTask.py", 
line 209, in log_progress
            retval = func(*args, **kwds)
          File 
"/usr/local/lib/python2.6/dist-packages/xen/xend/XendDomainInfo.py", line 2576, 
in _constructDomain
            self._recreateDom()
          File 
"/usr/local/lib/python2.6/dist-packages/xen/xend/XendDomainInfo.py", line 1730, 
in _recreateDom
            complete(self.dompath, lambda t: self._recreateDomFunc(t))
          File 
"/usr/local/lib/python2.6/dist-packages/xen/xend/xenstore/xstransact.py", line 
364, in complete
            if t.commit():
          File 
"/usr/local/lib/python2.6/dist-packages/xen/xend/xenstore/xstransact.py", line 
41, in commit
            rc = xshandle().transaction_end(self.transaction, False)
        Error: (2, 'No such file or directory')
        
oxenstored was in use in every case, which does tend to focus the
attention on:

26521:2c0fd406f02c tools/ocaml: oxenstored: Be more paranoid about ring reading
26522:ffd30e7388ad oxenstored: Enforce a maximum message size of 4096 bytes

The other two changes in the range under test are 
        x86: debugging code for testing 16Tb support on smaller memory systems
        xen: enable stubdom on a per arch basis
which seem far less plausible.

The bisector doesn't appear to be having a go at this issue though.

At least one of the xend migration failures also ends with a similar
xshandle().transaction_end stack trace. I don't see anything similar in
any of the xl variants, but that may be down to poor logging plus the
fact that xl cases are the minority and one of them has no logs. This
mostly affects Windows VMs but not exclusively.

Ian.


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