Hi All,
I did some further debugging and am attaching some more information here. Any help is appreciated of course. Out of curiosity, are we amongst the few people who are trying to use the OCAML version of xenstored?
If I change the Config.mk to disable building the OCAML version of xenstored xend starts up and I can do “xm info” and everything works fine.
If I build the OCAML version of xenstored instead, I get the “xend is not started error” even though I see two xend processes.
Furthermore, if I run the OCAML xentored with an strace, I get the following error:
“strace -f /usr/bin/xenstored --no-fork”
open("/dev/xen/eventchn", O_RDWR) = 6
open("/proc/xen/xsd_port", O_RDONLY) = 7
read(7, "145", 20) = 3
close(7) = 0
open("/proc/xen/xsd_kva", O_RDWR) = 7
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0x7f2a4f682000
close(7) = 0
ioctl(6, EVIOCGVERSION, 0x7fff86ad7320) = -1 ENOTTY (Inappropriate ioctl for device)
write(2, "Fatal error: exception Failure(\""..., 64Fatal error: exception Failure("ioctl bind_interdomain failed")
) = 64
exit_group(2) = ?
thanks
Yuvraj
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Yuvraj Agarwal
Sent: Wednesday, February 09, 2011 10:26 AM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: Asim
Subject: RE: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not starting?
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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