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Re: [Xen-devel] [xen-unstable-smoke test] 127247: regressions - FAIL
- To: Wei Liu <wei.liu2@xxxxxxxxxx>, osstest service owner <osstest-admin@xxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 4 Sep 2018 09:49:11 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 04 Sep 2018 08:49:17 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 04/09/18 09:45, Wei Liu wrote:
> On Tue, Sep 04, 2018 at 07:55:04AM +0000, osstest service owner wrote:
>> flight 127247 xen-unstable-smoke real [real]
>> http://logs.test-lab.xenproject.org/osstest/logs/127247/
>>
>> Regressions :-(
>>
>> Tests which did not succeed and are blocking,
>> including tests which could not be run:
>> test-amd64-amd64-xl-qemuu-debianhvm-i386 10 debian-hvm-install fail REGR.
>> vs. 127212
> Sep 4 06:49:12.366727 (XEN) MMIO emulation failed (1): d107v0 32bit @
> 0000:00100000 -> 55 89 e5 53 83 ec 10 8b 55 0c b8 20 02 08 00 8b
> Sep 4 06:49:12.378690 (XEN) d107v0 Triple fault - invoking HVM shutdown
> action 1
> Sep 4 06:49:12.378727 (XEN) *** Dumping Dom107 vcpu#0 state: ***
> Sep 4 06:49:12.378755 (XEN) ----[ Xen-4.12-unstable x86_64 debug=y Not
> tainted ]----
> Sep 4 06:49:12.390738 (XEN) CPU: 0
> Sep 4 06:49:12.390796 (XEN) RIP: 0000:[<0000000000100000>]
> Sep 4 06:49:12.390846 (XEN) RFLAGS: 0000000000010002 CONTEXT: hvm guest
> (d107v0)
> Sep 4 06:49:12.402729 (XEN) rax: 0000000000000000 rbx: 00000000001a8000
> rcx: 0000000000000000
> Sep 4 06:49:12.402796 (XEN) rdx: 0000000000000000 rsi: 0000000000000000
> rdi: 0000000000000000
> Sep 4 06:49:12.414742 (XEN) rbp: 0000000000000000 rsp: 0000000000000000
> r8: 0000000000000000
> Sep 4 06:49:12.426728 (XEN) r9: 0000000000000000 r10: 0000000000000000
> r11: 0000000000000000
> Sep 4 06:49:12.426795 (XEN) r12: 0000000000000000 r13: 0000000000000000
> r14: 0000000000000000
> Sep 4 06:49:12.438672 (XEN) r15: 0000000000000000 cr0: 0000000000000011
> cr4: 0000000000000000
> Sep 4 06:49:12.450724 (XEN) cr3: 0000000000000000 cr2: 0000000000000000
> Sep 4 06:49:12.450787 (XEN) fsb: 0000000000000000 gsb: 0000000000000000
> gss: 0000000000000000
> Sep 4 06:49:12.462739 (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss:
> 0000 cs: 0000
> Sep 4 06:49:12.462805 [ 647.449914] xenbr0: port 3(vif107.0-emu) entered
> disabled state
>
> Looking at the range of changeset there is one potential culprit:
>
> x86/hvm: Fix mapping corner case during task switching
You've already R-by the patch which fixes this bug.
HVMLoader doesn't work too well when it tries to execute
hypercall_xen_version first, without a working stack.
There is a separate bug here which is xl/libxl's approach to crashing
guests. If you notice, it reboots ad-infinitum until OSSTest times
out. It is nigh on impossible to stop a runaway domain like this with
libxl. The best I've come up with is to mv the kernel binary sideways
so the next reboot gets ESRCH.
~Andrew
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