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Re: [Xen-devel] [xen-unstable test] 110009: regressions - FAIL

>>> On 05.06.17 at 18:55, <osstest-admin@xxxxxxxxxxxxxx> wrote:
> flight 110009 xen-unstable real [real]
> http://logs.test-lab.xenproject.org/osstest/logs/110009/ 
> Regressions :-(
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  test-amd64-amd64-xl-qemut-win7-amd64 15 guest-localmigrate/x10 fail REGR. 
> vs. 109841

So finally we have some output from the debugging code added by
933f966bcd ("x86/mm: add temporary debugging code to
get_page_from_gfn_p2m()"), i.e. the migration heisenbug we hope
to hunt down:

(XEN) d0v2: d7 dying (looking up 3e000)
(XEN) Xen call trace:
(XEN)    [<ffff82d0803150ef>] get_page_from_gfn_p2m+0x7b/0x416
(XEN)    [<ffff82d080268e88>] arch_do_domctl+0x51a/0x2535
(XEN)    [<ffff82d080206cf9>] do_domctl+0x17e4/0x1baf
(XEN)    [<ffff82d080355896>] pv_hypercall+0x1ef/0x42d
(XEN)    [<ffff82d0803594c6>] entry.o#test_all_events+0/0x30

which points at XEN_DOMCTL_getpageframeinfo3 handling code.
What business would the tool stack have invoking this domctl for
a dying domain? I'd expect all of these operations to be done
while the domain is still alive (perhaps paused), but none of them
to occur once domain death was initiated.


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