Xen devel - Feb 2006 - qemu-dm segfault with multiple HVM domains?

When running multiple HVM/VT win2003 domains on a large system (4socket, 
8core, HT), qemu-dm will often segfault on all but one of the domains. My 
last sucessful test was on friday. (with yesterday''s tip (8911), all my
windows domains hung on boot, and today''s (8922) won''t compile
due to the
physbase problem in domain.c that there''s a patch pending
for..I''ll be
trying with that soon, and then reverting back until I find the changeset 
that broke it)

The easiest way to reproduce is to start up 4 windows domains in rapid 
succession.  Each one will start to boot, but early in the boot 
process, three of the 4 qemu-dm processes will crash.  The fourth one 
will continue on just fine.  The core dumps left behind are garbage.
>From dom0 dmesg:
qemu-dm[4721]: segfault at 0000000000000000 rip 0000000000000000 rsp 
0000000040800198 error 14
xenbr0: port 5(tun2) entering disabled state
device tun2 left promiscuous mode
xenbr0: port 5(tun2) entering disabled state
qemu-dm[4705]: segfault at 0000000000000000 rip 0000000000000000 rsp 
0000000040800198 error 14
xenbr0: port 4(tun1) entering disabled state
device tun1 left promiscuous mode
xenbr0: port 4(tun1) entering disabled state
qemu-dm[4689]: segfault at 0000000000000000 rip 0000000000000000 rsp 
0000000040800198 error 14


If you stagger the startup times a little bit, the domains will come up 
and stay up for a while (~10-30minutes) and then all but one qemu-dm will 
eventually segfault.  If I run just one domain it seems to work fine, 
running over the weekend with very light load.

I see that others have been running HVM domain tests, has anyone run 
multiple Windows domains for any period of time on HVM?  Has anyone tried 
to start multiple windows domains in rapid succession?

Thanks,
john.c

- --
John Clemens			jclemens@virtualiron.com

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Just verifying that with cs 8932 I still see this problem.  I''m able to
start multiple windows domains, but either immediately or over time all 
but one qemu-dm processes segfaults.  This only appears to be a problem 
when I start multiple windows domains, a single domain seems to work fine.

qemu-dm[4961]: segfault at 0000000000000000 rip 0000000000000000 rsp 
0000000040800198 error 14
qemu-dm[4963]: segfault at 0000000000000000 rip 0000000000000000 rsp 
0000000040800198 error 14

john.c

- --
John Clemens			jclemens@virtualiron.com


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

>Just verifying that with cs 8932 I still see this problem.  
>I''m able to 
>start multiple windows domains, but either immediately or over 
>time all 
>but one qemu-dm processes segfaults.  This only appears to be 
>a problem 
>when I start multiple windows domains, a single domain seems 
>to work fine.
>
>qemu-dm[4961]: segfault at 0000000000000000 rip 0000000000000000 rsp 
>0000000040800198 error 14
>qemu-dm[4963]: segfault at 0000000000000000 rip 0000000000000000 rsp 
>0000000040800198 error 14
>
Thanks, I ever met this issue too, but did not pay much attention to
this :-(
Can you pls fire a bug?
-Xin
>john.c
>
>- --
>John Clemens			jclemens@virtualiron.com
>
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@lists.xensource.com
>http://lists.xensource.com/xen-devel
>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Thanks, glad to know I''m not the only one seeing this...  I''ve
opened
bug 542.

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=542

john.c

- --
John Clemens			jclemens@virtualiron.com

On Thu, 23 Feb 2006, Li, Xin B wrote:
>> Just verifying that with cs 8932 I still see this problem.
>> I''m able to
>> start multiple windows domains, but either immediately or over
>> time all
>> but one qemu-dm processes segfaults.  This only appears to be
>> a problem
>> when I start multiple windows domains, a single domain seems
>> to work fine.
>>
>> qemu-dm[4961]: segfault at 0000000000000000 rip 0000000000000000 rsp
>> 0000000040800198 error 14
>> qemu-dm[4963]: segfault at 0000000000000000 rip 0000000000000000 rsp
>> 0000000040800198 error 14
>>
>
> Thanks, I ever met this issue too, but did not pay much attention to
> this :-(
> Can you pls fire a bug?
> -Xin
>
>> john.c
>>
>> - --
>> John Clemens			jclemens@virtualiron.com
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>>
>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel