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Re: [Xen-devel] xen-unstable+pvops kernel, I don't have xenbus and xenwa

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] xen-unstable+pvops kernel, I don't have xenbus and xenwatch kernel thread.
From: Min Lee <min.lee@xxxxxxxxxx>
Date: Thu, 10 Jun 2010 10:25:15 -0400
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Thanks a lot! I used to work on old xen versions mainly..
I've updated the kernel also, and it now has xen/...,
so now it's working. Thanks again, Jeremy!
Min

On 6/9/2010 2:54 PM, Jeremy Fitzhardinge wrote:
On 06/09/2010 11:51 AM, Min Lee wrote:
[root@vmphone210 ~]# cat /proc/misc
  57 autofs
224 tpm0
  58 device-mapper
  59 network_throughput
  60 network_latency
  61 cpu_dma_latency
144 nvram
228 hpet
  62 evtchn
227 mcelog
  63 vga_arbiter
[root@vmphone210 ~]#

As you see, evtchn is there, but no gntdev,
thanks!

Ah, you just haven't compiled it in.  qemu now relies on it, so you need
to compile it in.  And if you're running a current xen-unstable, you
should update the kernel to get the fixed evtchn and gntdev device names
(ie, with xen/).

     J


On 6/9/2010 2:43 PM, Jeremy Fitzhardinge wrote:
On 06/09/2010 11:37 AM, Min Lee wrote:
Hi, Jeremy.
Yes, xenstored is running and xenstore-ls dumps its contents, although
I had to start it manually.
I have only evtchn in /dev/xen. No gntdev.

What does /proc/misc say?  Does it list "xen/evtchn" and "xen/gntdev" or
just the non-xen/ versions?

      J



On 6/9/2010 2:23 PM, Jeremy Fitzhardinge wrote:
On 06/09/2010 08:05 AM, Min Lee wrote:
Hello. folks.
I've tried Xen-unstable + Jeremy's pvops kernel on ibm x3550M2 server
machine, on centos 5.4.
Also I've already checked these instructions..
http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher
Now, it seems like domain creation cannot find its virtual devices..
So I couldn't start my domains. I had these messages..

xenconsole: Could not read tty from store: No such file or directory
Error: Device 0 (vif) could not be connected. Hotplug scripts not
working.
Error: Device 2049 (vbd) could not be connected. Path closed or
removed during hotplug add: backend/vbd/5/2049 state: 1

/proc/xen has these files.

-r--r--r-- 1 root root 0 Jun  8 09:57 capabilities
-rw------- 1 root root 0 Jun  8 09:57 privcmd
-rw------- 1 root root 0 Jun  8 09:57 xenbus
-rw------- 1 root root 0 Jun  8 09:57 xsd_kva
-rw------- 1 root root 0 Jun  8 09:57 xsd_port

'make install-tools' didn't install links in my /etc/rc directories,
so I had to run manually xenconsoled, xenstored, and xend, but
I found that I have no xenbus and xenwatch kernel threads.
Is this why it can't finds virtual devices??

Is xenstored running?  Do you have the evtchn and gntdev devices in
/dev/xen?

       J








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