Re: [Xen-devel] libxl: cannot start guest

[Christoph Egger <Christoph.Egger@xxxxxxx>]

On 05/21/12 17:57, Ian Campbell wrote:

>> libxl: debug: libxl_device.c:183:libxl__device_disk_set_backend: Disk
>> vdev=hda spec.backend=unknown
>> libxl: debug: libxl_device.c:219:libxl__device_disk_set_backend: Disk
>> vdev=hda, using backend phy
>> xc: detail: elf_parse_binary: phdr: paddr=0x100000 memsz=0x9bd04
>> xc: detail: elf_parse_binary: memory: 0x100000 -> 0x19bd04
>> xc: info: VIRTUAL MEMORY ARRANGEMENT:
>>   Loader:        0000000000100000->000000000019bd04
>>   TOTAL:         0000000000000000->00000000ff800000
>>   ENTRY ADDRESS: 0000000000100000
>> xc: info: PHYSICAL MEMORY ALLOCATION:
>>   4KB PAGES: 0x0000000000000200
>>   2MB PAGES: 0x00000000000003fb
>>   1GB PAGES: 0x0000000000000002
>> xc: detail: elf_load_binary: phdr 0 at 0x0x7f7ff7f42000 -> 0x0x7f7ff7fd4b74
>> libxl: error: libxl.c:3213:libxl_sched_credit_domain_set: Cpu weight out
>> of range, valid values are within range from 1 to 65535
>> libxl: error: libxl_dom.c:74:libxl__sched_set_params:
>> libxl_sched_credit_domain_set failed -6
>> libxl: debug: libxl_device.c:183:libxl__device_disk_set_backend: Disk
>> vdev=hda spec.backend=phy
>> libxl: error: libxl_xshelp.c:102:libxl__xs_get_dompath: failed to get
>> dompath for 7: Bad file descriptor
> 
> This is back to the original issue, I think the last couple of mails
> have been something of a tangent since you weren't getting as far as
> this failure.
> 
> I'm not really sure what to suggest here -- something is either closing
> the fd or scribbling over the memory which contains it.
> 
> I suppose you could sprinkle calls to libxl__xs_get_dompath() around
> between libxl__sched_set_params and libxl__device_disk_set_backend and
> see where it starts failing -- that's going to be pretty tedious though.


It starts failing in libxl__build_post() right after
xs_introduce_domain().

Christoph


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