[Xen-bugs] [Bug 757] kernel BUG at mm/rmap.c:560!

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=757





------- Comment #7 from paul@xxxxxxxxxxx  2007-10-15 17:42 -------
(In reply to comment #6)
> Any idea what commands or processes were running in the guest at the time of
> the crash?

I can give you a list of the 'standard' processes that are always running on
the guest. I'm not sure of any way to find out if anything additional was
running. The standard processes are:

 init [2]                             
 [migration/0]                        
 [ksoftirqd/0]                        
 [watchdog/0]                         
 [events/0]                           
 [khelper]                            
 [kthread]                            
 [xenwatch]                           
 [xenbus]                             
 [kblockd/0]                          
 [kseriod]                            
 [pdflush]                            
 [pdflush]                            
 [kswapd0]                            
 [aio/0]                              
 [kpsmoused]                          
 [kmirrord]                           
 /sbin/syslogd                        
 /sbin/klogd -x                       
 /usr/sbin/cvsd -f /etc/cvsd/cvsd.conf
 /usr/lib/postfix/master              
 pickup -l -t fifo -u -c              
 qmgr -l -t fifo -u                   
 /usr/sbin/sshd                       
 /usr/sbin/cron                       
 /usr/sbin/apache2 -k start           
 /usr/sbin/apache2 -k start           
 /usr/sbin/apache2 -k start           
 /usr/sbin/apache2 -k start           
 /sbin/getty 38400 tty1               
 sshd: root@pts/0                     
 -bash                                
 ps aux                               


> It would be great if you could try and come up with a reliable way to repro.

I'll do my best. I've got nothing in the logs which helps me see what causes
this...

> You could collect a guest crashdump, but to be honest this kind of bug is 
> tough
> to debug via a dump.
> 
> Were you exercising save/restore/live relo? 

No.

> Were you using the balloon driver? 

No.

> Were you doing anything fancy with your networking setup?

No. We use the default bridge setup.

> Were you exercising the LVM snapshot stuff at the time? (in guest or host)

No. We use loopback files.


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