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Re: [Xen-devel] [PATCH for-4.12] x86/hvm: Increate the triple fault log message to XENLOG_ERR
- To: Wei Liu <wei.liu2@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 28 Feb 2019 10:58:56 +0000
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- Cc: Juergen Gross <jgross@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>
- Delivery-date: Thu, 28 Feb 2019 10:59:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 28/02/2019 10:58, Wei Liu wrote:
> I think you mean "Increase" in the subject line.
I do, fixed.
>
> On Thu, Feb 28, 2019 at 10:48:53AM +0000, Andrew Cooper wrote:
>> At INFO level, it doesn't get printed out by default in release builds,
>> leading to unqualified logging such as this:
>>
>> (XEN) [ 66.995993] Freed 524kB init memory
>> (XEN) [ 1993.144997] *** Dumping Dom9 vcpu#2 state: ***
>> (XEN) [ 1993.145008] ----[ Xen-4.11.1 x86_64 debug=n Not tainted ]----
>> (XEN) [ 1993.145011] CPU: 21
>> (XEN) [ 1993.145015] RIP: 0010:[<ffffe0002ba950ef>]
>> (XEN) [ 1993.145018] RFLAGS: 0000000000010246 CONTEXT: hvm guest (d9v2)
>> (XEN) [ 1993.145026] rax: 00000000ffffe000 rbx: ffffe0002d8e1440 rcx:
>> 0000ffffe0002ba9
>> (XEN) [ 1993.145031] rdx: 0000000000000000 rsi: ffffe0002ba93575 rdi:
>> fffff803dfb9f340
>> (XEN) [ 1993.145035] rbp: ffffd001cd791200 rsp: ffffd001cd791140 r8:
>> 0000000000000130
>> (XEN) [ 1993.145039] r9: 0000000080000000 r10: 0000000000000000 r11:
>> 0000000000000020
>> (XEN) [ 1993.145043] r12: ffffe0002ba9306d r13: 0000000000000000 r14:
>> 0000000000000001
>> (XEN) [ 1993.145047] r15: fffff803dfb9f200 cr0: 0000000080050031 cr4:
>> 0000000000170678
>> (XEN) [ 1993.145051] cr3: 00000000001aa002 cr2: 0000020488403f70
>> (XEN) [ 1993.145056] fsb: 0000000060f71000 gsb: ffffd001cc1af000 gss:
>> 0000009d60f6f000
>> (XEN) [ 1993.145060] ds: 002b es: 002b fs: 0053 gs: 002b ss: 0018
>> cs: 0010
>>
>> A triple fault is fatal to the domain under all circumstances (so will print
>> at most once), and in practice is always an error condition rather than a
>> reboot fallback.
>>
>> Reported-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
>> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Thanks,
~Andrew
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