[Xen-devel] xen/arm Problem with virtual disks

[Andrii Anisov <andrii.anisov@xxxxxxxxxxxxxxx>]

Hello,

I'm trying to provide my DomU with virtual disk but have faced some strange issue. Disk device is discovered in DomU but it is not usable. In DomU some trash is read from the xvd* device, and does not reflect what is read from the correspondent device in Dom0. Moreover trash read from the device differs each time (I checked that by dd)

I have xen 4.3 release with my patches for panda5 board.

Dom0 is K3.8, DomU is K3.4.

Dom0 environment is busybox, /etc/xen/scripts/block and related scripts are adjusted to be executed by busybox ash.

In my config I have following disk definition:

disk = ["phy:/dev/mmcblk0,xvdb,w"]

on verbose create, related output is:

ibxl: debug: libxl_device.c:257:libxl__device_disk_set_backend: Disk vdev=xvdb spec.backend=phy

libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch w=0x379f8 wpath=/local/domain/0/backend/vbd/1/51728/state token=3/0: register slotnum=3

libxl: debug: libxl_create.c:1241:do_domain_create: ao 0x36880: inprogress: poller=0x36808, flags=i

libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x379f8 wpath=/local/domain/0/backend/vbd/1/51728/state token=3/0: event epath=/local/domain/0/backend/vbd/1/51728/state

libxl: debug: libxl_event.c:647:devstate_watch_callback: backend /local/domain/0/backend/vbd/1/51728/state wanted state 2 still waiting state 1

libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x379f8 wpath=/local/domain/0/backend/vbd/1/51728/state token=3/0: event epath=/local/domain/0/backend/vbd/1/51728/state

libxl: debug: libxl_event.c:643:devstate_watch_callback: backend /local/domain/0/backend/vbd/1/51728/state wanted state 2 ok

libxl: debug: libxl_event.c:596:libxl__ev_xswatch_deregister: watch w=0x379f8 wpath=/local/domain/0/backend/vbd/1/51728/state token=3/0: deregister slotnum=3

libxl: debug: libxl_event.c:608:libxl__ev_xswatch_deregister: watch w=0x379f8: deregister unregistered

libxl: debug: libxl_device.c:959:device_hotplug: calling hotplug script: /etc/xen/scripts/block add

When DomU discovers virtual disk, in Dom0 console I see following output:

xen-blkback:ring-ref 8, event-channel 3, protocol 1 (arm-abi) 

Could it be a problem in contradiction of blkfront and blkback in different kernels?

Could you please give me some clue to debug such an issue?

Sincerely,

Andrii Anisov.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel