[Xen-devel] zombie domains? or at least zombie devices.

[Luke S Crawford <lsc@xxxxxxxxx>]

so I'm getting this problem where users on a particular server, if they
shut down, they can't come back up again.  I notice that the vif
assigned to that domU still exists, too.

[root@branch ~]# xenstore-list /local/domain/0/backend/vbd|wc -l
132
[root@branch ~]# xenstore-list /local/domain/0/backend/vif|wc -l
132
[root@branch ~]# xenstore-list /local/domain/0/backend/console|wc -l
132
[root@branch ~]# xenstore-list /local/domain|wc -l
61

I do a 

for i in `xenstore-list /local/domain/0/backend/vif` ; do  echo "reading domain 
${i}:" ;xenstore-read /local/domain/0/backend/vif/${i}/0/vifname; done


and I see a lot of duplicates, and a lot of domain ids that don't
exist... just a short snippit:

reading domain 435:
trouclec
reading domain 436:
trouclec
reading domain 437:
rippond
reading domain 438:
rippond
reading domain 439:
trouclec
reading domain 440:
trouclec
reading domain 441:
rippond


[root@branch ~]# xm list 441
Error: Domain '441' does not exist.
[root@branch ~]# xm list 440
Error: Domain '440' does not exist.
[root@branch ~]# xm list 439
Error: Domain '439' does not exist.
[root@branch ~]# xm list 438
Error: Domain '438' does not exist.
[root@branch ~]# xm list 437
Error: Domain '437' does not exist.


[root@branch ~]# uname -a
Linux branch.prgmr.com 2.6.18.8-xen #1 SMP Mon Sep 21 04:02:36 UTC 2009 x86_64 
x86_64 x86_64 GNU/Linux

relivant bits of xm info:

xen_major              : 3
xen_minor              : 4
xen_extra              : .2-rc1-pre
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p 
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : Mon Sep 07 08:53:07 2009 +0100 19754:7422afed66ee
cc_compiler            : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)
cc_compile_by          : root
cc_compile_domain      : xen.prgmr.com
cc_compile_date        : Mon Sep 21 05:21:00 UTC 2009
xend_config_format     : 4


[root@branch ~]# xenstore-read /local/domain/0/backend/vif/441/0/vifname
rippond
[root@branch ~]# ifconfig rippond
rippond   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:267843 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1306735 errors:0 dropped:48495 overruns:0 carrier:0
          collisions:0 txqueuelen:32 
          RX bytes:396517385 (378.1 MiB)  TX bytes:225048891 (214.6 MiB)


(note, the 'dropped' counter in the 'TX'column continues to increment.)

Any thoughts?

-- 
Luke S. Crawford
http://prgmr.com/xen/         -   Hosting for the technically adept
http://nostarch.com/xen.htm   -   We don't assume you are stupid.  

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