Re: [Xen-devel] [BUG] xl devd segmentation fault on xl block-detach

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, May 03, 2017 at 04:27:41PM +0300, Reinis Martinsons wrote:
> On 03.05.2017 13:27, Wei Liu wrote:
> libxl: debug: libxl_linux.c:200:libxl__get_hotplug_script_info: num_exec 1, 
> not running hotplug scripts
> libxl: debug: libxl_device.c:1143:device_hotplug: No hotplug script to execute
> libxl: debug: libxl_event.c:686:libxl__ev_xswatch_deregister: watch 
> w=0x206e9a0: deregister unregistered
> libxl: debug: libxl.c:3721:device_complete: device 
> /local/domain/1/backend/vbd/0/51712 remove succeed
> libxl: debug: libxl_event.c:1838:libxl__ao__destroy: ao 0x2070b80: destroy
> libxl: debug: libxl_event.c:573:watchfd_callback: watch w=0x7fff97ba73a8 
> wpath=/local/domain/1/backend token=3/0: event 
> epath=/local/domain/1/backend/vbd/0/51712
> libxl: debug: libxl_event.c:2223:libxl__nested_ao_create: ao 0x2070b80: 
> nested ao, parent 0x206e350
> libxl: debug: libxl_event.c:1838:libxl__ao__destroy: ao 0x2070b80: destroy
> libxl: debug: libxl_event.c:573:watchfd_callback: watch w=0x7fff97ba73a8 
> wpath=/local/domain/1/backend token=3/0: event 
> epath=/local/domain/1/backend/vbd/0/51728/online
> libxl: debug: libxl_event.c:2223:libxl__nested_ao_create: ao 0x2070b80: 
> nested ao, parent 0x206e350

Interesting, so it seems xl devd never removed dguest from the list.

I wonder what else could go wrong.

I've managed to reproduce this locally. I will try to fix it for 4.9.

Wei.

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