[Xen-bugs] [Bug 1185] New: CPU soft lock up with xen 3.2.0

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1185

           Summary: CPU soft lock up with xen 3.2.0
           Product: Xen
           Version: unspecified
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: apoorva@xxxxxxxxx


Hardware:
4 Dual-Core AMD Opteron(tm) Processor 2216 HE
cpu MHz : 2400.028
cache size : 1024 KB
4GB RAM

Software:
Xen 3.2.0 with credit scheduler
32 bit CentOS 5.1 Dom0 with 64-bit Hypervisor
Started 32 bit Linux DomUs in all 32 of them with 64MB RAM each.
Started 16 iperf servers and 16 iperf clients for 400 seconds.

BUG:
Output of /var/log/messages:
Feb 28 14:15:00 rktst-srv1 kernel: BUG: soft lockup detected on CPU#0!
Feb 28 14:15:00 rktst-srv1 kernel:  [<c0105522>] show_trace+0x12/0x20
Feb 28 14:15:00 rktst-srv1 kernel:  [<c0105649>] dump_stack+0x19/0x20
Feb 28 14:15:00 rktst-srv1 kernel:  [<c013b7e3>] softlockup_tick+0x83/0xa0
Feb 28 14:18:33 rktst-srv1 kernel:  [<c0126612>] run_local_timers+0x12/0x20
Feb 28 14:18:33 rktst-srv1 kernel:  [<c0108c50>] timer_interrupt+0x3e0/0x530
Feb 28 14:18:33 rktst-srv1 kernel:  [<c013c01a>] handle_IRQ_event+0x5a/0x90
Feb 28 14:18:33 rktst-srv1 kernel:  [<c013c0b4>] __do_IRQ+0x64/0xd0
Feb 28 14:18:41 rktst-srv1 kernel:  [<c0106ac2>] do_IRQ+0x32/0x70
Feb 28 14:18:41 rktst-srv1 kernel:  [<c020962f>] evtchn_do_upcall+0x9f/0x150
Feb 28 14:18:41 rktst-srv1 kernel:  [<c01052c1>] hypervisor_callback+0x3d/0x45
Feb 28 14:18:41 rktst-srv1 kernel:  [<d904368a>] scsi_request_fn+0x33a/0x380
[scsi_mod]
Feb 28 14:18:42 rktst-srv1 kernel:  [<c01a8085>]
__generic_unplug_device+0x25/0x30
Feb 28 14:18:43 rktst-srv1 kernel:  [<c01a80a2>]
generic_unplug_device+0x12/0x30
Feb 28 14:23:24 rktst-srv1 kernel:  [<d90c3cb2>] dm_table_unplug_all+0x42/0x50
[dm_mod]
Feb 28 14:23:24 rktst-srv1 VRM: TP_SKT.c(1461): m_skt_write(): Write failed -
Connection aborted unexpectedly, err=Connection reset by peer
Feb 28 14:25:14 rktst-srv1 kernel:  [<d90c1a1a>] dm_unplug_all+0x1a/0x30
[dm_mod]
Feb 28 14:25:15 rktst-srv1 VRM: TP_SKT.c(1363): m_skt_read(): Read failed -
Connection aborted unexpectedly, err=Connection reset by peer

Xen Config file:

# Kernel image file.
kernel = "/boot/vmlinuz-2.6.16.33-xenU"
# Optional ramdisk.
ramdisk = "/boot/initrd-2.6.16.33-xenU.img"
memory = 64
vif = [ 'mac=00:16:3e:00:00:01, bridge=xenbr0' ]
disk = [ 'phy:/dev/loop0,hda1,w','phy:/dev/loop32,hda2,w' ]
# Set root device.
root = "/dev/hda1 ro"
# Sets runlevel 4.
extra = "4"

on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'


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