[Xen-devel] 4.0-rc9-pre/xen-next: BUG: scheduling while atomic: xenwatch

[Mark Hurenkamp <mark.hurenkamp@xxxxxxxxx>]

Hi,

I've got a machine running 4.0-rc9-pre with xen-next kernel. During boot-up i
see the following message repeated several times, is this harmful? Can i do
anything about it?
If you like more info, just let me know.

Regards,
Mark.


BUG: scheduling while atomic: xenwatch/23/0x00000003                            
                                                                                
                              
INFO: lockdep is turned off.                                                    
                                                                                
                              
Modules linked in: radeon ttm drm_kms_helper drm joydev hidp rfcomm sco bnep 
l2cap tun xt_physdev vboxnetadp vboxnetflt vboxdrv dummy bridge stp llc cx8800 
cx88xx bttv ir_common lirc_i2c lirc_dev autofs4 ipv6 nfsd exportfs nfs 
tda18271 tda10048 lockd fscache nfs_acl auth_rpcgss wm8775 tea5767 
tuner_simple tuner_types tda9887 tda8290 snd_hda_codec_atihdmi tuner 
snd_hda_codec_via cx25840 snd_hda_intel msp3400 snd_hda_codec cx23885 saa7127 
snd_pcm_oss sunrpc snd_mixer_oss videobuf_dma_sg snd_hwdep videobuf_dvb 
snd_seq_dummy snd_pcm saa7115 snd_seq_oss dvb_core snd_seq_midi ivtv 
snd_rawmidi i2c_algo_bit cx2341x snd_seq_midi_event v4l2_common snd_seq 
videobuf_core videodev snd_timer v4l1_compat btcx_risc snd_seq_device btusb 
v4l2_compat_ioctl32 8250_pnp snd tveeprom asix soundcore asus_atk0110 
bluetooth snd_page_alloc i2c_core usbnet 8250 hwmon shpchp serial_core raid10 
raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy 
async_tx multipath linear fuse raid0 raid1 ata_generic pata_acpi r8169 mii 
pata_jmicron                                                                    
                                    
Pid: 23, comm: xenwatch Tainted: G        W  2.6.32mh23 #3                      
                                                                                
                              
Call Trace:                                                                     
                                                                                
                              
 [<ffffffff8104ee00>] __schedule_bug+0x77/0x7c                                  
                                                                                
                              
 [<ffffffff8147a611>] schedule+0xd5/0x849                                       
                                                                                
                              
 [<ffffffff8100ea71>] ? xen_force_evtchn_callback+0xd/0xf                       
                                                                                
                              
 [<ffffffff8100f362>] ? check_events+0x12/0x20                                  
                                                                                
                              
 [<ffffffff8107c3a8>] ? prepare_to_wait+0x58/0x61                               
                                                                                
                              
 [<ffffffff8147d448>] ? _spin_unlock_irqrestore+0x70/0x7e                       
                                                                                
                              
 [<ffffffff812c33fa>] read_reply+0xa1/0x11e                                     
                                                                                
                              
 [<ffffffff8107c13e>] ? autoremove_wake_function+0x0/0x39                       
                                                                                
                              
 [<ffffffff812c35ef>] xs_talkv+0xb2/0x174                                       
                                                                                
                              
 [<ffffffff8124b375>] ? kasprintf+0x38/0x3b                                     
                                                                                
                              
 [<ffffffff812c37f6>] xs_single+0x3a/0x3c                                       
                                                                                
                              
 [<ffffffff812c3ea5>] xenbus_read+0x42/0x5b                                     
                                                                                
                              
 [<ffffffff812c3ffd>] xenbus_scanf+0x22/0x75                                    
                                                                                
                              
 [<ffffffff81249790>] ? snprintf+0x34/0x36                                      
                                                                                
                              
 [<ffffffff812ca444>] pciback_publish_pci_root+0xe6/0x242                       
                                                                                
                              
 [<ffffffff8108fc10>] ? lock_acquired+0x255/0x264                               
                                                                                
                              
 [<ffffffff812ccc02>] ? pciback_publish_pci_roots+0x2c/0xc3                     
                                                                                
                              
 [<ffffffff812c0202>] ? xen_evtchn_do_upcall+0x11a/0x1ec                        
                                                                                
                              
 [<ffffffff812ca35e>] ? pciback_publish_pci_root+0x0/0x242                      
                                                                                
                              
 [<ffffffff812ccc68>] pciback_publish_pci_roots+0x92/0xc3                       
                                                                                
                              
 [<ffffffff812ca97c>] pciback_setup_backend+0x239/0x2e6                         
                                                                                
                              
 [<ffffffff812c3f91>] ? xenbus_gather+0xd3/0x11d                                
                                                                                
                              
 [<ffffffff812caa55>] pciback_be_watch+0x2c/0x30                                
                                                                                
                              
 [<ffffffff812cb2f8>] pciback_xenbus_probe+0x1ae/0x1fa                          
                                                                                
                              
 [<ffffffff812c49ee>] xenbus_dev_probe+0xb8/0x17c                               
                                                                                
                              
 [<ffffffff813099f8>] driver_probe_device+0xde/0x1fe                            
                                                                                
                              
 [<ffffffff81309bd3>] __device_attach+0x3a/0x3f                                 
                                                                                
                              
 [<ffffffff81309b99>] ? __device_attach+0x0/0x3f                                
                                                                                
                              
 [<ffffffff81308b97>] bus_for_each_drv+0x59/0x90                                
                                                                                
                              
 [<ffffffff81309c6d>] device_attach+0x66/0x7d                                   
                                                                                
                              
 [<ffffffff813089ab>] bus_probe_device+0x27/0x3e                                
                                                                                
                              
 [<ffffffff81307025>] device_add+0x3b4/0x55f                                    
                                                                                
                              
 [<ffffffff8124d9fd>] ? __spin_lock_init+0x31/0x54                              
                                                                                
                              
 [<ffffffff813071ee>] device_register+0x1e/0x22                                 
                                                                                
                              
 [<ffffffff812c4ea7>] xenbus_probe_node+0x129/0x1cf                             
                                                                                
                              
 [<ffffffff812c50a8>] xenbus_dev_changed+0x15b/0x18b                            
                                                                                
                              
 [<ffffffff8100f34f>] ? xen_restore_fl_direct_end+0x0/0x1                       
                                                                                
                              
 [<ffffffff8109002d>] ? lock_release+0x1ac/0x1b9                                
                                                                                
                              
 [<ffffffff8124d84f>] ? _raw_spin_unlock+0x8f/0x98                              
                                                                                
                              
 [<ffffffff812c5177>] backend_changed+0x3b/0x5b                                 
                                                                                
                              
 [<ffffffff812c331e>] xenwatch_thread+0x111/0x14c                               
                                                                                
                              
 [<ffffffff8107c13e>] ? autoremove_wake_function+0x0/0x39                       
                                                                                
                              
 [<ffffffff812c320d>] ? xenwatch_thread+0x0/0x14c                               
                                                                                
                              
 [<ffffffff8107be20>] kthread+0x7f/0x87                                         
                                                                                
                              
 [<ffffffff81013e9a>] child_rip+0xa/0x20                                        
                                                                                
                              
 [<ffffffff810137d4>] ? restore_args+0x0/0x30                                   
                                                                                
                              
 [<ffffffff8100f362>] ? check_events+0x12/0x20                                  
                                                                                
                              
 [<ffffffff8100f362>] ? check_events+0x12/0x20                                  
                                                                                
                              
 [<ffffffff81013e90>] ? child_rip+0x0/0x20                                      
                                                                                
                              

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