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RE: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not starti

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not starting?
From: "Yuvraj Agarwal" <yuvraj@xxxxxxxxxxx>
Date: Wed, 9 Feb 2011 10:26:18 -0800 (PST)
Cc: Asim <linkasim@xxxxxxxxx>
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I did some more debugging and based on some of the instructions on http://wiki.xen.org/xenwiki/XenParavirtOps I found out that I may have been missing the "gntdev" module.

I rebuilt the kernel and added that in (part of the kernel rather than as a separate module), but still have the same issues. Adding some more debugging information:

 

root@nor:/home/yuvraj# cat /proc/misc

 54 network_throughput

55 network_latency

56 cpu_dma_latency

57 device-mapper

221 mpt2ctl

144 nvram

228 hpet

58 blktap-control

59 gntdev  

 60 evtchn  

 61 autofs

231 snapshot

184 microcode

227 mcelog

62 rfkill

63 vga_arbiter


root@nor:/home/yuvraj# ll /dev/xen/  

total 0

drwxr-xr-x  2 root root     80 2011-02-08 22:07 ./

drwxr-xr-x 17 root root   6120 2011-02-08 22:07 ../

crw-r-----  1 root root 10, 63 2011-02-08 22:07 eventchn

crw-rw----  1 root root 10, 60 2011-02-08 22:07 evtchn

root@nor:/home/yuvraj#

 

Seems like I am missing the /dev/xen/gntdev entries?  Shouldn’t these be created automatically?

Thanks

Yuvraj

 

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Yuvraj Agarwal
Sent: Tuesday, February 08, 2011 9:02 AM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not starting?

 

Hi All,

 

I just tried a new installation of Ubuntu 10.04 (64bit) + Xen and am having some trouble starting XEN. I am using the latest mercurial checkout

(4.0.2-rc2) and the only change I made was to Config.mk to enable building the OCAML version of xenstored. " CONFIG_OCAML_XENSTORED ?= y". I am using the same kernel I built earlier for a similar Ubuntu 10.04-64bit / Xen

4.0.0 installation (version 2.6.32.12).  I would like to use the OCAML version of xenstored since it is supposed to be much better/faster when starting up a larger number of domUs.

 

The system starts up, and I can see xend started up, but when I do "xm list" or "xm info" I get an error message that xend has not started up?

 

root@EM:/etc# xm list

Error: Unable to connect to xend: No such file or directory. Is xend running?

root@EM:/etc#

 

root@EM:/etc# ps -efw | grep xen

root        88     2  0 Feb07 ?        00:00:00 [xenwatch]

root        89     2  0 Feb07 ?        00:00:00 [xenbus]

root      6254     1  0 Feb07 ?        00:00:00 /usr/bin/python

/usr/sbin/xend start

root      6255  6254  0 Feb07 ?        00:00:17 /usr/bin/python

/usr/sbin/xend start

root      7043  5919  0 08:55 pts/2    00:00:00 grep --color=auto xen

root@EM:/etc#

 

root@EM:/etc# uname -a

Linux EM 2.6.32.12 #11 SMP Fri Jun 18 20:52:17 PDT 2010 x86_64 GNU/Linux root@EM:/etc#

 

I did check and found two difference with my earlier installation of Xen

4.0.0 with the same kernel (although with the standard xenstored).

1. The xen 4.0 installation does show a "xenstored" process also running in addition to these ones.

2.  "xend" seems to be looking for a directory, " /var/lib/xenstored" that doesn't seem to exist on my system?

 

Any pointers to fix this issue?

 

Thanks!

Yuvraj

 

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