Re: credit2 domU freeze at "Writing SMBIOS tables ..."

[George Dunlap <George.Dunlap@eu.citrix.com>]

Is this just using credit2, or does it do the same thing under credit1?

On my box, stubdoms with a 4-vcpu guest on credit1 fail too, with this
output on the console:

xs_read_watch() -> /local/domain/3/log-throttling /local/domain/3/log-throttling
xs_read(/local/domain/3/log-throttling): ENOENT
(XEN) HVM3: HVM Loader
xs_read_watch() -> /local/domain/0/backend/console/3 be:0x13fb66:3:0x154240
(XEN) HVM3: Detected Xen v4.2-unstable
Page fault at linear address 0x10, eip 0x49d9, regs 0x3cfb3c, sp 0x0,
our_sp 0x3cfb18, code 0
(XEN) HVM3: Xenbus rings @0xfeffc000, event channel 5
Thread: main
(XEN) HVM3: System requested ROMBIOS
EIP: 49d9, EFLAGS 10202.
(XEN) HVM3: CPU speed is 1995 MHz
EBX: 00000000 ECX: 001589b0 EDX: 00000000
ESI: 0000000c EDI: 0000000c EBP: 003cfbb8 EAX: 00000000
DS: e021 ES: e021 orig_eax: ffffffff, eip: 000049d9
CS: e019 EFLAGS: 00010202 esp: 00000000 ss: 3cfba4
base is 0x3cfbb8 caller is 0x24bd3
base is 0x3cfbf8 caller is 0x9814
base is 0x3cfe88 caller is 0xe8e91
base is 0x3cfff0 caller is 0x31ad

3cfba0: 00 00 00 00 28 15 00 00 00 00 00 00 0a 00 00 00
3cfbb0: 67 96 13 00 e8 fb 3c 00 f8 fb 3c 00 d3 4b 02 00
3cfbc0: 00 00 00 00 51 e5 01 00 00 00 00 00 00 00 00 00
3cfbd0: 00 00 00 00 cb 96 13 00 78 94 00 82 03 00 00 00

49c0: c8 c1 e8 05 83 e1 1f 8b 44 85 ec d3 f8 a8 01 74
49d0: 0e 8b 43 14 89 04 24 ff d2 83 7b 10 00 75 23 8b
49e0: 53 0c 85 d2 74 1c 8b 0b 89 c8 c1 e8 05 83 e1 1f
49f0: 8b 44 85 e4 d3 f8 a8 01 74 08 8b 43 14 89 04 24
Pagetable walk from virt 10, base 371000:
  L3 = 00000000b074f027 (0x372000)  [offset = 0]
   L2 = 00000000b074d067 (0x374000)  [offset = 0]
    L1 = 0000000000000000 [offset = 0]

 -George

On Wed, Apr 27, 2011 at 6:24 PM, John Weekes
<lists.xen@nuclearfallout.net> wrote:
> On 4/27/2011 2:10 AM, George Dunlap wrote:
>>>
>>> This would seem to confirm that the BUG_ON is being avoided now, but the
>>> >  frequent SMBIOS issue means that I won't be able to start testing
>>> > credit2
>>> >  with a subset of customers yet.
>>
>> If you still have time, would you mind:
>> * Starting a new e-mail thread (since it's a different bug), and
>
> Done.
>
> To recap here, my Debian Squeeze stubdom-based HVM domU is frequently not
> completely starting, freezing after the output "Writing SMBIOS tables ...".
>
>> * Taking a 30-second trace of the VM booting and hanging with the
>> following command:
>>  # xentrace -D -e all -T 30 [filename]&  xl create [configuration]
>> * Sending me the resulting trace (it will probably be 100-300MiB in size).
>
> I am emailing you offlist with a link to the trace now. I had to use "xm"
> instead of "xl" because "xl" still doesn't seem to work right with stubdoms
> (a separate bug); it probably needs to wait a little longer for the main
> domU to be created before creating the stubdom.
>
> # xl create testvds4-xl.cfg
> Parsing config file testvds4-xl.cfg
> xc: info: VIRTUAL MEMORY ARRANGEMENT:
>  Loader:        0000000000100000->00000000001793f0
>  TOTAL:         0000000000000000->0000000031800000
>  ENTRY ADDRESS: 0000000000100000
> xc: info: PHYSICAL MEMORY ALLOCATION:
>  4KB PAGES: 0x0000000000000200
>  2MB PAGES: 0x000000000000018b
>  1GB PAGES: 0x0000000000000000
> xl: libxl_create.c:292: libxl__domain_make: Assertion
> `!libxl_domid_valid_guest(*domid)' failed.
> Aborted
>
> -John
>
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