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[Xen-devel] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]

Hello,

I can't boot HVM with debian squeeze 6.0.2.1 when I use more than 4VCPUs in the hvm.cfg file (s. some error messages from the console are below)

I am wondering about the following lines:
# ---
#root@xen411dom0:/etc/xen# xm console 7
[  134.220058] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
[ 134.220058] Modules linked in: uhci_hcd thermal ehci_hcd ata_piix xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base scsi_mod
[  134.292664] CPU 0:
[ 134.292664] Modules linked in: uhci_hcd thermal ehci_hcd ata_piix xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base scsi_mod
[  134.319566] Pid: 0, comm: swapper Not tainted 2.6.32-5-amd64 #1 HVM domU
# ---

Do I need some patches or special additional setting of my the squeezy HVM?

Thank you / regards,
Mark

--
ms@xxxxxxxxxxxxxxxxxxxxxx

# ---
root@xen411dom0:/etc/xen# xm console 7
[  134.220058] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
[  134.220058] Modules linked in: uhci_hcd thermal ehci_hcd ata_piix 
xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base scsi_mod
[  134.292664] CPU 0:
[  134.292664] Modules linked in: uhci_hcd thermal ehci_hcd ata_piix 
xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base scsi_mod
[  134.319566] Pid: 0, comm: swapper Not tainted 2.6.32-5-amd64 #1 HVM domU
[  134.369933] RIP: 0010:[<ffffffff8102c58c>]  [<ffffffff8102c58c>] 
native_safe_halt+0x2/0x3
[  134.369933] RSP: 0018:ffffffff8142ded0  EFLAGS: 00000246
[  134.420796] RAX: ffffffff8142dfd8 RBX: ffffffff814d67d0 RCX: 0000000000000000
[  134.420796] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
[  134.420796] RBP: ffffffff81011dce R08: 0000000000000000 R09: 0000000081528d90
[  134.470673] R10: 00000000fffede31 R11: 0000000000000001 R12: ffffffff814d4dc0
[  134.470673] R13: ffffffff8102cdcc R14: ffffffff8102cdcc R15: ffff88020bd80710
[  134.521042] FS:  00007f6b183817a0(0000) GS:ffff880008c00000(0000) 
knlGS:0000000000000000
[  134.521042] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[  134.521042] CR2: 00007f6b17c6de10 CR3: 000000020c797000 CR4: 00000000000006f0
[  134.571410] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  134.571410] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  134.571410] Call Trace:
[  134.571410]  [<ffffffff81017201>] ? default_idle+0x34/0x51
[  134.571410]  [<ffffffff8101758d>] ? c1e_idle+0xf5/0xfb
[  134.621779]  [<ffffffff8100feb1>] ? cpu_idle+0xa2/0xda
[  134.621779]  [<ffffffff814f3140>] ? early_idt_handler+0x0/0x71
[  134.621779]  [<ffffffff814f3cdd>] ? start_kernel+0x3dc/0x3e8
[  134.621779]  [<ffffffff814f33b7>] ? x86_64_start_kernel+0xf9/0x106
udevd[98]: worker [107] unexpectedly returned with status 0x0100

udevd[98]: worker [107] failed while handling '/devices/pci0000:00/0000:00:01.1'

udevd[98]: worker [109] unexpectedly returned with status 0x0100

udevd[98]: worker [109] failed while handling '/devices/pci0000:00/0000:00:01.2'


udevadm settle - timeout of 180 seconds reached, the event queue contains:
  /sys/devices/vif-0 (509)
  /sys/devices/vif-0/net/eth0 (629)
  /sys/devices/pci0000:00/0000:00:01.1/host0 (636)
  /sys/devices/pci0000:00/0000:00:01.1/host0/scsi_host/host0 (637)
  /sys/devices/pci0000:00/0000:00:01.1/host1 (638)
  /sys/devices/pci0000:00/0000:00:01.1/host1/scsi_host/host1 (639)
[  199.716053] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
[  199.716053] Modules linked in: scsi_wait_scan(+) uhci_hcd thermal ehci_hcd 
ata_piix xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base 
scsi_mod
[  199.792417] CPU 0:
[  199.804323] Modules linked in: scsi_wait_scan(+) uhci_hcd thermal ehci_hcd 
ata_piix xen_netfront libata xen_blkfront floppy usbcore thermal_sys nls_base 
scsi_mod
[  199.828661] Pid: 0, comm: swapper Not tainted 2.6.32-5-amd64 #1 HVM domU
[  199.828661] RIP: 0010:[<ffffffff8102c58c>]  [<ffffffff8102c58c>] 
native_safe_halt+0x2/0x3
[  199.828661] RSP: 0018:ffffffff8142ded0  EFLAGS: 00000246
[  199.828661] RAX: ffffffff8142dfd8 RBX: ffffffff814d67d0 RCX: 0000000000000000
[  199.828661] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
[  199.828661] RBP: ffffffff81011dce R08: 0000000000000000 R09: 0000000081528d90
[  199.828661] R10: 00000000fffede31 R11: 0000000000000001 R12: ffffffff814d4dc0
[  199.828661] R13: ffffffff8102cdcc R14: ffffffff8102cdcc R15: ffff88020bd80710
[  199.828661] FS:  00007f6b183817a0(0000) GS:ffff880008c00000(0000) 
knlGS:0000000000000000
[  199.828661] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[  199.828661] CR2: 00007f6b17c6de10 CR3: 000000020c797000 CR4: 00000000000006f0
[  199.828661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  199.828661] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  199.828661] Call Trace:
[  199.828661]  [<ffffffff81017201>] ? default_idle+0x34/0x51
[  199.828661]  [<ffffffff8101758d>] ? c1e_idle+0xf5/0xfb
[  199.828661]  [<ffffffff8100feb1>] ? cpu_idle+0xa2/0xda
[  199.828661]  [<ffffffff814f3140>] ? early_idt_handler+0x0/0x71
[  199.828661]  [<ffffffff814f3cdd>] ? start_kernel+0x3dc/0x3e8
[  199.828661]  [<ffffffff814f33b7>] ? x86_64_start_kernel+0xf9/0x106
[  242.368420] INFO: task modprobe:110 blocked for more than 120 seconds.
[  242.397772] "echo 0>  /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  242.433087] modprobe      D ffff88020c750000     0   110      1 0x00000008
[  242.467191]  ffff88020c750000 0000000000000086 ffff88020bc31eb8 
ffff88020bc31eb4
[  242.529192]  0000000000000001 ffffffff8114017a 000000000000f9e0 
ffff88020bc31fd8
[  242.580440]  0000000000015780 0000000000015780 ffff88020c7e0710 
ffff88020c7e0a08
[  242.643053] Call Trace:
[  242.655368]  [<ffffffff8114017a>] ? sysfs_addrm_finish+0x1d/0x20a
[  242.682685]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  242.706564]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  242.730188]  [<ffffffff8106a173>] ? 
async_synchronize_cookie_domain+0xac/0x106
[  242.770192]  [<ffffffff81064f1a>] ? autoremove_wake_function+0x0/0x2e
[  242.801989]  [<ffffffff810689cd>] ? __blocking_notifier_call_chain+0x51/0x5f
[  242.839526]  [<ffffffff8106a1e9>] ? async_synchronize_full+0x10/0x2c
[  242.853035]  [<ffffffff8107aa93>] ? sys_init_module+0x18c/0x21a
[  242.865641]  [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b
[  242.878727] INFO: task modprobe:114 blocked for more than 120 seconds.
[  242.892536] "echo 0>  /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  242.923819] modprobe      D ffff88020c750000     0   114      1 0x00000008
[  242.950968]  ffff88020c750000 0000000000000086 ffff88020bc7feb8 
ffff88020bc7feb4
[  242.980742]  0000000000000001 ffffffff8114017a 000000000000f9e0 
ffff88020bc7ffd8
[  243.010580]  0000000000015780 0000000000015780 ffff88020c7e0e20 
ffff88020c7e1118
[  243.045486] Call Trace:
[  243.056195]  [<ffffffff8114017a>] ? sysfs_addrm_finish+0x1d/0x20a
[  243.079447]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  243.101785]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  243.120773]  [<ffffffff8106a173>] ? 
async_synchronize_cookie_domain+0xac/0x106
[  243.144224]  [<ffffffff81064f1a>] ? autoremove_wake_function+0x0/0x2e
[  243.157902]  [<ffffffff810689cd>] ? __blocking_notifier_call_chain+0x51/0x5f
[  243.179377]  [<ffffffff8106a1e9>] ? async_synchronize_full+0x10/0x2c
[  243.199721]  [<ffffffff8107aa93>] ? sys_init_module+0x18c/0x21a
[  243.220748]  [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b
[  243.243504] INFO: task modprobe:156 blocked for more than 120 seconds.
[  243.266942] "echo 0>  /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  243.292222] modprobe      D 0000000000000000     0   156      1 0x00000000
[  243.323701]  ffff88020f097100 0000000000000082 0000000000000000 
ffffffff8105a8dc
[  243.359538]  0000000000000000 0000000000000292 000000000000f9e0 
ffff88020bf15fd8
[  243.378636]  0000000000015780 0000000000015780 ffff88020bed8710 
ffff88020bed8a08
[  243.397627] Call Trace:
[  243.403676]  [<ffffffff8105a8dc>] ? try_to_del_timer_sync+0x63/0x6c
[  243.416619]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  243.427784]  [<ffffffff812fbab6>] ? mutex_lock+0xd/0x31
[  243.444511]  [<ffffffff812e7966>] ? klist_next+0x3c/0xa7
[  243.462728]  [<ffffffff8106a173>] ? 
async_synchronize_cookie_domain+0xac/0x106
[  243.488071]  [<ffffffff81064f1a>] ? autoremove_wake_function+0x0/0x2e
[  243.501905]  [<ffffffff810689cd>] ? __blocking_notifier_call_chain+0x51/0x5f
[  243.516667]  [<ffffffff8106a1e9>] ? async_synchronize_full+0x10/0x2c
[  243.529964]  [<ffffffff8107aa93>] ? sys_init_module+0x18c/0x21a
[  243.542466]  [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b



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