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Re: [Xen-devel] Test for osstest, features used in Qubes OS
- To: George Dunlap <dunlapg@xxxxxxxxx>, Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 21 May 2018 17:17:26 +0100
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- Cc: Simon Gaiser <simon@xxxxxxxxxxxxxxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxx>
- Delivery-date: Mon, 21 May 2018 16:17:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 21/05/18 16:48, George Dunlap wrote:
> On Fri, May 18, 2018 at 5:19 PM, Marek Marczykowski
> <marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>> On Fri, May 18, 2018 at 09:54:37AM -0600, Jan Beulich wrote:
>>>>>> On 18.05.18 at 17:33, <marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>>>> Yes, I'm happy to help with that. As I've said, the basic test is very
>>>> simple (rtcwake command) and already very useful. The fact that it is(?)
>>>> broken on staging doesn't make it easier,
>>> Details on the breakage would be appreciated (on a separate thread),
>>> unless you plan to address it yourself. I recall Simon(?) mentioning this as
>>> well, but also not providing sufficient data to consider looking into it
>>> (perhaps simply because it wasn't easy to obtain useful data, as
>>> frequently is the case with S3 resume). I think it would be nice if we could
>>> release 4.11 without a regression here.
>> I only know that Simon have tested it and it fails. Cc'ing him.
> Well I tried it with a post-RC 4.11 and got the below. I haven't done
> any investigation.
>
> -George
>
> <snip>
> (XEN) CPU3: Intel(R) Xeon(R) CPU E5630 @ 2.53GHz stepping 02
> (XEN) *** DOUBLE FAULT ***
> (XEN) ----[ Xen-4.11-rc x86_64 debug=y Not tainted ]----
> (XEN) CPU: 0
> (XEN) RIP: e008:[<ffff82d080377944>] handle_exception+0x9c/0xf7
Do you have xen-syms from this build? That looks like its in the middle
of the Spectre alternative, but isn't the wrmsr instruction itself.
> (XEN) RFLAGS: 0000000000010006 CONTEXT: hypervisor
> (XEN) rax: ffffc900422480b8 rbx: 0000000000000000 rcx: 0000000000000005
> (XEN) rdx: 0000000000000000 rsi: 0000000000000000 rdi: 0000000000000000
> (XEN) rbp: 000036ffbddb7f27 rsp: ffffc90042248000 r8: 0000000000000000
> (XEN) r9: 0000000000000000 r10: 0000000000000000 r11: 0000000000000000
> (XEN) r12: 0000000000000000 r13: 0000000000000000 r14: ffffc9004224ffff
> (XEN) r15: 0000000000000000 cr0: 000000008005003b cr4: 00000000000026e0
> (XEN) cr3: 000000018a100000 cr2: ffffc90042247ff8
> (XEN) fsb: 00007f6242d95700 gsb: ffff88003dc00000 gss: 0000000000000000
> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008
> (XEN) Current stack base ffffc90042248000 differs from expected
> ffff8300dfa80000
> (XEN) Valid stack range: ffffc9004224e000-ffffc90042250000,
> sp=ffffc90042248000, tss.rsp0=ffff8300dfa87fa0
> (XEN) No stack overflow detected. Skipping stack trace.
I really need to wire up the code dump, irrespective of this particular
issue.
~Andrew
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) DOUBLE FAULT -- system shutdown
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
>
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