Re: [Xen-users] xen_blkbk times out before getting connected

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On 03/02/13 18:50, Yathindra wrote:
> I'm using the latest linux kernel 3.8.0 with Xen 4.3-unstable. Xenstored 
> is being started at boot time.
> I did not see any message (dmesg/syslog/console) about device being 
> plugged in but xenstore-ls shows me all
> the entries backend and frontend.

Could you post your DomU configuration file also?

> Here are some details
> ------------------------------
>  From /var/log/syslog:
> 
> Feb  3 10:37:31 localhost kernel: [   36.466359] Event-channel device 
> installed.
> Feb  3 10:37:31 localhost kernel: [   36.636358] Register 
> xen_blkbk_driver  <<< custom debug message I added
> Feb  3 10:37:31 localhost kernel: [   36.636367] 
> xenbus_register_backend   <<< custom debug message I added
> Feb  3 10:37:31 localhost kernel: [   36.683533] xenbus_register_backend
> Feb  3 10:37:31 localhost kernel: [   36.830115] xen-pciback: backend is 
> vpci  <<< custom debug message I added
> Feb  3 10:37:31 localhost kernel: [   36.830123] 
> xenbus_register_backend       <<< custom debug message I added
> Feb  3 10:37:32 localhost xenstored: Checking store ...
> Feb  3 10:37:32 localhost xenstored: Checking store complete.
> Feb  3 10:37:32 localhost kernel: [   37.075217] xenbus_probe: xenstored 
> is ready  <<< custom debug message I added
> Feb  3 10:37:32 localhost kernel: [   37.075230] watching node 
> FFFFFFFF81C7D1A0
> Feb  3 10:37:32 localhost kernel: [   37.081309] xenbus_scanf for node cpu/0
> Feb  3 10:37:32 localhost kernel: [   37.081327] XENBUS xen store gave: 
> unknown error cpu
> Feb  3 10:37:32 localhost kernel: [   37.081333] xenbus_scanf for node cpu/1
> Feb  3 10:37:32 localhost kernel: [   37.085327] XENBUS unexpected type 
> [17], expected [2]
> Feb  3 10:37:32 localhost kernel: [   37.085342] watching node 
> FFFFFFFF81C7D0C0
> Feb  3 10:37:32 localhost kernel: [   37.086857] XENBUS unexpected type 
> [17], expected [4]
> Feb  3 10:37:32 localhost kernel: [   37.086865] Failed to set shutdown 
> watcher
> Feb  3 10:37:32 localhost kernel: [   37.086880] backend_probe_and_watch 
> - enumerates devices in xenstore and watches for changes  <<< custom 
> debug message I added
> Feb  3 10:37:32 localhost kernel: [   37.089401] XENBUS unexpected type 
> [4], expected [1]
> Feb  3 10:37:32 localhost kernel: [   37.089411] watching node 
> FFFFFFFF81C7D660
> Feb  3 10:37:32 localhost kernel: [   37.090715] XENBUS xen store gave: 
> unknown error control/shutdown
> Feb  3 10:37:32 localhost kernel: [   37.090725] 
> frontend_probe_and_watch: calling xenbus_probe_devices <<< custom debug 
> message I added
> Feb  3 10:37:32 localhost kernel: [   37.092362] XENBUS unexpected type 
> [17], expected [1]
> Feb  3 10:37:32 localhost kernel: [   37.092376] watching node 
> FFFFFFFF81C7D820
> Feb  3 10:37:32 localhost kernel: [   37.093334] watching node 
> FFFFFFFF81C7DB20
> Feb  3 10:37:32 localhost kernel: [   37.094454] XENBUS xen store gave: 
> unknown error backend   <<< still not sure how critical this is
> Feb  3 10:37:32 localhost kernel: [   37.094463] Failed to set balloon 
> watcher                                    <<< still not sure how 
> critical this is
> 
>  > xenstore-ls
> tool = ""
>   xenstored = ""
> local = ""
>   domain = ""
>    0 = ""
>     data = ""
>      meminfo_total = "930680"
>      meminfo_free = "691868"
>      os_name = "Ubuntu 12.04.1 LTS"
>      os_majorver = "12"
>      os_minorver = "04"
>      os_uname = "3.8.0-rc5+"
>      os_distro = "ubuntu"
>      updated = "Sun Feb  3 10:43:32 MST 2013"
>     name = "Domain-0"
>     attr = ""
>      xenbr0 = ""
>       ip = "155.98.39.2"
>      PVAddons = ""
>       MajorVersion = "5"
>       MinorVersion = "5"
>       MicroVersion = "0"
>       BuildVersion = "17913"
>       Installed = "1"
>     device-model = ""
>      0 = ""
>       state = "running"
> 
> After this I start the guest domain, here's the xenstore entries,
> 
> nodea:~> sudo xenstore-ls
> tool = ""
>   xenstored = ""
> local = ""
>   domain = ""
>    0 = ""
>     data = ""
>      meminfo_total = "930680"
>      meminfo_free = "695408"
>      os_name = "Ubuntu 12.04.1 LTS"
>      os_majorver = "12"
>      os_minorver = "04"
>      os_uname = "3.8.0-rc5+"
>      os_distro = "ubuntu"
>      updated = "Sun Feb  3 10:45:32 MST 2013"
>     name = "Domain-0"
>     attr = ""
>      xenbr0 = ""
>       ip = "155.98.39.2"
>      PVAddons = ""
>       MajorVersion = "5"
>       MinorVersion = "5"
>       MicroVersion = "0"
>       BuildVersion = "17913"
>       Installed = "1"
>     device-model = ""
>      0 = ""
>       state = "running"
>     memory = ""
>      target = "1048576"
>      static-max = "4294967292"
>      freemem-slack = "314476"
>     libxl = ""
>      disable_udev = "1"
>     backend = ""
>      vbd = ""
>       1 = ""
>        2049 = ""
>         frontend = "/local/domain/1/device/vbd/2049" <<<< everything 
> seems to be enumerated
>         params = "/dev/loop0"
>         script = "/etc/xen/scripts/block"
>         physical-device = "7:0"
>         frontend-id = "1"
>         online = "1"
>         removable = "0"
>         bootable = "1"
>         state = "1"
>         dev = "sda1"
>         type = "phy"
>         mode = "w"
>         device-type = "disk"
>    1 = ""
>     vm = "/vm/9b0dfb10-f69d-4e22-9158-bb70456ece2e"
>     name = "guest2"
>     cpu = ""
>      0 = ""
>       availability = "online"
>     memory = ""
>      static-max = "512000"
>      target = "512001"
>      videoram = "-1"
>     device = ""
>      suspend = ""
>       event-channel = ""
>      vbd = ""
>       2049 = ""
>        backend = "/local/domain/0/backend/vbd/1/2049"
>        backend-id = "0"
>        state = "1" <<<<< state changes to 5 and then after 5 secs it 
> times out
>        virtual-device = "2049"
>        device-type = "disk"
>     control = ""
>      shutdown = ""
>      platform-feature-multiprocessor-suspend = "1"
>      platform-feature-xs_reset_watches = "1"
>     data = ""
>     domid = "1"
>     store = ""
>      port = "1"
>      ring-ref = "156845"
> vm = ""
>   9b0dfb10-f69d-4e22-9158-bb70456ece2e = ""
>    uuid = "9b0dfb10-f69d-4e22-9158-bb70456ece2e"
>    name = "guest2"
>    image = ""
>     ostype = "linux"
>     kernel = "/boot/vmlinuz-3.8.0-rc5+"
>     ramdisk = "/boot/initrd.img-3.8.0-rc5+"
>     cmdline = "root=/dev/disk/by-path/xen-vbd-2049 ro xencons=tty"
>    start_time = "1359913591.67"
> libxl = ""
>   1 = ""
>    dm-version = "qemu_xen"
> 
> Thanks,
> Yathi


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