Xen devel - May 2009 - xm create can''t find /proc/xen/balloon

I have the latest git sources of xen, ioemu and linux.  I just now did a 
"git pull" in each just to be sure.

When I do an "xm create" I get:

    Error: [Errno 2] No such file or directory:
''/proc/xen/balloon''

Searching the list archives told me that this is most commonly caused by 
not having enough memory available for the DomU, but I have fixed that.

I''m pretty sure the problem is that the paravirt_ops Linux kernel puts 
its balloon in sysfs and not procfs.  So I applied Jeremy''s patch found
here:

   http://lists.xensource.com/archives/html/xen-devel/2008-11/msg00358.html

... then rebuilt and rebooted.  But I still get the message.

However, that patch changes a file in xend''s sources.

Does xm need a similar patch - or should xm be looking at that same 
python module in xend''s directory?  I don''t know the codebase
well
enough to figure it out yet, though I''ll be investigating while I await
your responses.

Thanks for your help,

Mike
-- 
Michael David Crawford
mdc@prgmr.com

    prgmr.com - We Don''t Assume You Are Stupid.

       Xen-Powered Virtual Private Servers: http://prgmr.com/xen

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Have you mounted xenfs ?

-dulloor

On May 11, 2009, at 8:47 AM, Michael David Crawford <mdc@prgmr.com>  
wrote:
> I have the latest git sources of xen, ioemu and linux.  I just now  
> did a "git pull" in each just to be sure.
>
> When I do an "xm create" I get:
>
>   Error: [Errno 2] No such file or directory:
''/proc/xen/balloon''
>
> Searching the list archives told me that this is most commonly  
> caused by not having enough memory available for the DomU, but I  
> have fixed that.
>
> I''m pretty sure the problem is that the paravirt_ops Linux kernel
> puts its balloon in sysfs and not procfs.  So I applied Jeremy''s  
> patch found here:
>
>  http://lists.xensource.com/archives/html/xen-devel/2008-11/msg00358.html
>
> ... then rebuilt and rebooted.  But I still get the message.
>
> However, that patch changes a file in xend''s sources.
>
> Does xm need a similar patch - or should xm be looking at that same  
> python module in xend''s directory?  I don''t know the
codebase well
> enough to figure it out yet, though I''ll be investigating while I
> await your responses.
>
> Thanks for your help,
>
> Mike
> -- 
> Michael David Crawford
> mdc@prgmr.com
>
>   prgmr.com - We Don''t Assume You Are Stupid.
>
>      Xen-Powered Virtual Private Servers: http://prgmr.com/xen
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Dulloor wrote:
> Have you mounted xenfs ?
Hi again,

I should say that the problem isn''t that /proc/xen/balloon is missing. 
I''m using the paravirt_ops Linux kernel.

The problem is that *something* in Xen - I haven''t figured out what yet
- *should* be looking at:

   /sys/devices/system/xen_memory/xen_memory0

... but hasn''t been updated to know about the new location yet.

Thanks,

Mike
-- 
Michael David Crawford
mdc@prgmr.com

    prgmr.com - We Don''t Assume You Are Stupid.

       Xen-Powered Virtual Private Servers: http://prgmr.com/xen

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Michael David Crawford wrote:
> Does xm need a similar patch - or should xm be looking at that same 
> python module in xend''s directory?  I don''t know the
codebase well
> enough to figure it out yet, though I''ll be investigating while I 
> await your responses. 
xm talks to xend to do everything; that one change should be 
sufficient.  Are you sure you installed it and restarted the daemon?

    J

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel