Re: xen-unstable+pvops kernel, I don't have xenbus and xenwatch kernel thread.

[Jeremy Fitzhardinge <jeremy@goop.org>]

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
>>>>
>>>
>>
>>
>