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

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

[Min Lee]

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??

Almost all Xen-related configs in .config are enabled.
for example, this is part of .config

CONFIG_XEN_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
# CONFIG_XEN_BLKDEV_TAP is not set
CONFIG_XEN_PCIDEV_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
# CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
# CONFIG_XEN_PCIDEV_BACKEND_SLOT is not set
# CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER is not set
CONFIG_XEN_PCIDEV_BE_DEBUG=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
# CONFIG_XEN_PLATFORM_PCI is not set
CONFIG_XEN_XENBUS_FRONTEND=y

Thank you for any comments/help!

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

[Jeremy Fitzhardinge]

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

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

[Min Lee]

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.


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
>

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

[Jeremy Fitzhardinge]

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
>>
>

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

[Min Lee]

[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!

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
>>>
>>
>
>

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

[Jeremy Fitzhardinge]

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

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

[Min Lee]

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