From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Christopher S. Aker" <caker@theshore.net>
Subject: BUG: soft lockup detected on CPU#0!
Date: Tue, 04 Apr 2006 21:39:03 -0500
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BUG: soft lockup detected on CPU#0!
Pid: 17178, comm:        xvd 275 fd:86
EIP: 0061:[<c0133b65>] CPU: 1
EIP is at kthread_should_stop+0x15/0x20
  EFLAGS: 00000246    Not tainted  (2.6.16-xen0 #1)
EAX: 00000001 EBX: 00000000 ECX: c05431b4 EDX: 00000000
ESI: 00000000 EDI: cc7b143c EBP: c5f11f98 DS: 007b ES: 007b
CR0: 8005003b CR2: 090a8928 CR3: 0635f000 CR4: 00000660
  [<c0387bd5>] blkif_schedule+0x25/0x4a0
  [<c0133e90>] autoremove_wake_function+0x0/0x60
  [<c0133c6f>] kthread+0xff/0x110
  [<c0387bb0>] blkif_schedule+0x0/0x4a0
  [<c0133b70>] kthread+0x0/0x110
  [<c0102ca5>] kernel_thread_helper+0x5/0x10

These are happening every few minutes, for four domains, and rising. 
Machine is under somewhat high disk load (lots of scp processes copying 
large file systems, cfq disk sched).

xen_changeset: Sun Mar 26 11:50:39 2006 +0100 9441:30ae67d6e5f0

Those domain have now zombified and are unkillable.  I'll grab the 
latest updates and reboot the box.

-Chris