Hi, 

On Xen-unstable I encountered this non stopping logspam while trying to 
shutdown an HVM domain with 
pci-passthrough:

(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
(XEN) [2015-04-24 11:55:47.802] domain_crash called from io.c:165
(XEN) [2015-04-24 11:55:47.802] io.c:164:d25v0 Weird HVM ioemulation status 1.
 etc. etc. etc.

The domain had shutdown perfectly well on earlier occasions, but this time it
kept running. It did drop from it's assigned 3 vpcu's to 1 vpcu, but it stalled 
there.
The log spam only stopped by destroying the guest.

Since i haven't seen it before, it's probably hard to replicate.

--
Sander


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