[Xen-users] DomU stuck in boot

[Thomas Graves <tgraves@xxxxxxxxxxxxx>]

Hello,

I am running xen-3.3.1 with rhel5.3 dom0.
I have a rhel5.3 domU that is stuck in the boot process. It seems it is
trying to bring up the network.  We see this problem only occassionally.

This is the last console output:
Running configure_os...
Warning: Configuring networking...
Warning: HOSTNAME is not defined
Updating ifcfg-eth0 [  OK  ]
Allowing IPv4 link local addresses [  OK  ]
Warning: Starting networking...
Bringing up loopback interface:  [  OK  ]

It has been stuck for a few days now. I did a dump-core on it and it seems
to be doing network start -> ifup-eth ifcfg-eth0 boot -> ip link set dev
eth0 up -> hypercall.  I'm somewhat assuming it made the hypercall but never
got the event back but I'm not sure as I'm new to this.   Does anyone have a
good pointers on how exactly hypercalls work or any info on looking at
event-channels?  Any ideas why it might be stuck?


PID: 1290   TASK: ffff88007f7b50c0  CPU: 0   COMMAND: "ip"
ARG: ip link set dev eth0 up
ENV: TERM=linux
     OLDPWD=/etc/sysconfig/network-scripts
     PATH=/sbin:/usr/sbin:/bin:/usr/bin
     PWD=/etc/sysconfig/network-scripts
     LANG=en_US.UTF-8
     SHLVL=2
     _=/sbin/ip


Backtrace:
PID: 1290   TASK: ffff88007f7b50c0  CPU: 0   COMMAND: "ip"
 #0 [ffff88007c135d08] schedule at ffffffff80261e17
 #1 [ffff88007c135d50] hypercall_page at ffffffff8020622a
 #2 [ffff88007c135d78] hypercall_page at ffffffff8020622a
 #3 [ffff88007c135da0] __netif_rx_schedule at ffffffff80410360
 #4 [ffff88007c135dc0] network_open at ffffffff8810c992
 #5 [ffff88007c135de0] dev_open at ffffffff80411cd2
 #6 [ffff88007c135df0] dev_change_flags at ffffffff80410263
 #7 [ffff88007c135e20] devinet_ioctl at ffffffff80443763
 #8 [ffff88007c135ec0] sock_ioctl at ffffffff80408968
 #9 [ffff88007c135ee0] do_ioctl at ffffffff802437ba
#10 [ffff88007c135f00] vfs_ioctl at ffffffff80231010
#11 [ffff88007c135f40] sys_ioctl at ffffffff8024ddde
#12 [ffff88007c135f80] system_call at ffffffff8025f106
    RIP: 00002b5bbbf43c77  RSP: 00007fffef0627f8  RFLAGS: 00000246
    RAX: 0000000000000010  RBX: ffffffff8025f106  RCX: ffffffff8025f080
    RDX: 00007fffef062830  RSI: 0000000000008914  RDI: 0000000000000006
    RBP: 00007fffef062830   R8: 00007fffef062834   R9: 0000000000000003
    R10: 0000000000000000  R11: 0000000000000246  R12: 0000000000000001
    R13: 0000000000000001  R14: 0000000000000006  R15: 0000000000000000
    ORIG_RAX: 0000000000000010  CS: e033  SS: e02b

>From dom0 it looks like the network is setup right for the vif, they are
definitely all dropping packets right now though but I figured that was due
to the domU not finishing its setup:

vif912.0  Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:109 errors:0 dropped:785242 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:0 (0.0 b)  TX bytes:7501 (7.3 KiB)


Thanks,
Tom


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