[Xen-bugs] [Bug 1567] New: Hight load average on server

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1567

           Summary: Hight load average on server
           Product: Xen
           Version: 3.0.1
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: alex.faq8@xxxxxxxxx


Xen dom0 have 400-500 % cpu without started any domU's.

#uname -a
Linux asrv152 2.6.26-1-xen-amd64 #1 SMP Fri Mar 13 21:39:38 UTC 2009 x86_64
GNU/Linux


#xm info
host                  :asrv152                                                  
release                : 2.6.26-1xen-amd64                                      
version                : #1 SMP Fri Mar 13 21:39:38 UTC 2009                    
machine                : x86_64                                                 
nr_cpus                : 16                                                     
nr_nodes               : 1                                                      
cores_per_socket       : 4                                                      
threads_per_core       : 2                                                      
cpu_mhz                : 2800                                                   
hw_caps                :
bfebfbff:28100800:00000000:00000140:009ce3bd:00000000:00000001:00000000
virt_caps              : hvm
total_memory           : 49143
free_memory            : 9
node_to_cpu            : node0:0-15
node_to_memory         : node0:9
xen_major              : 3
xen_minor              : 3
xen_extra              : .1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.3.2 (Debian 4.3.2-1.1)
cc_compile_by          : root
cc_compile_domain      : q0.ru
cc_compile_date        : Mon Sep  7 12:30:05 MSD 2009
xend_config_format     : 4


#dmesg
[11555.264920] BUG: soft lockup - CPU#1 stuck for 72s! [swapper:0]              
[11555.264920] Modules linked in: xt_tcpudp xt_physdev iptable_filter ip_tables
x_tables tun bridge ipv6 nfsd auth_rpcgss exportfs nfs lockd nfs_acl sunrpc
loop psmouse serio_raw joydev pcspkr igb i2c_i801 i2c_core button dca evdev
ext3 jbd mbcache dm_mirror dm_log dm_snapshot dm_mod sg sr_mod cdrom
ata_generic sd_mod usbhid hid ff_memless ata_piix libata dock 3w_9xxx scsi_mod
ide_pci_generic ide_core ehci_hcd uhci_hcd thermal processor fan thermal_sys
[last unloaded: scsi_wait_scan]            
[11555.264920] CPU 1:                                                           
[11555.264920] Modules linked in: xt_tcpudp xt_physdev iptable_filter ip_tables
x_tables tun bridge ipv6 nfsd auth_rpcgss exportfs nfs lockd nfs_acl sunrpc
loop psmouse serio_raw joydev pcspkr igb i2c_i801 i2c_core button dca evdev
ext3 jbd mbcache dm_mirror dm_log dm_snapshot dm_mod sg sr_mod cdrom
ata_generic sd_mod usbhid hid ff_memless ata_piix libata dock 3w_9xxx scsi_mod
ide_pci_generic ide_core ehci_hcd uhci_hcd thermal processor fan thermal_sys
[last unloaded: scsi_wait_scan]            
[11555.264920] Pid: 0, comm: swapper Not tainted 2.6.26-1-xen-amd64 #1          
[11555.264920] RIP: e030:[<ffffffff802083aa>]  [<ffffffff802083aa>]             
[11555.264920] RSP: e02b:ffff880bce085f08  EFLAGS: 00000246                     
[11555.264920] RAX: 0000000000000000 RBX: 0000000000000001 RCX:
ffffffff802083aa                                             
[11555.264920] RDX: ffff880bce085f20 RSI: 0000000000000000 RDI:
0000000000000001
[11555.264920] RBP: 0000000000000000 R08: 0000000000000000 R09:
ffff880001be45b8
[11555.264920] R10: 000000000002de05 R11: 0000000000000246 R12:
0000000000000000
[11555.264920] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000
[11555.264920] FS:  00007f17a12016e0(0000) GS:ffffffff80539080(0000)
knlGS:0000000000000000
[11555.264920] CS:  e033 DS: 002b ES: 002b
[11555.264920] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[11555.264920] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[11555.264920]
[11555.264920] Call Trace:
[11555.264920]  [<ffffffff802611c3>] rcu_pending+0x26/0x50
[11555.264920]  [<ffffffff8020e795>] xen_safe_halt+0x90/0xa6
[11555.264920]  [<ffffffff8020a0c8>] xen_idle+0x2e/0x66
[11555.264920]  [<ffffffff80209cd6>] cpu_idle+0x97/0xb9
[11555.264920]
[11679.307618] clocksource/0: Time went backwards: ret=87640d4e276
delta=-21974281 shadow=8760b1e0c4a offset=37062cba
[11683.098873] clocksource/0: Time went backwards: ret=876f4079f5d
delta=-18332174 shadow=876bdeed2f9 offset=3730a100
[11687.618348] clocksource/0: Time went backwards: ret=877c16a0894
delta=-24783033 shadow=877ac5ae896 offset=16897019
[11703.815877] clocksource/0: Time went backwards: ret=87aa6d5af5d
delta=-10569174 shadow=87a779d7c57 offset=2fd982d8
[11710.569470] clocksource/0: Time went backwards: ret=87bdecb6ef2
delta=-16618728 shadow=87bdd3f36cb offset=289de33


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