Re: port-xen/46836: cannot change memory in domU via balloon

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR port-xen/46836; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-xen-maintainer%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
        netbsd-bugs%NetBSD.org@localhost
Subject: Re: port-xen/46836: cannot change memory in domU via balloon
Date: Sat, 25 Aug 2012 12:47:35 +0200

 On Sat, Aug 25, 2012 at 07:30:10AM +0000, agrier%poofygoof.com@localhost wrote:
 > >Description:
 > the xen balloon driver in domU does not appear to be able to request a
 > change in memory.
 > 
 > this works in linux with a stock fedora 17 kernel 3.5.2, IE 'echo
 > $NEWMEMSIZE > /sys/devices/system/xen_memory/xen_memory0/target' within
 > a linux domU will change the amount of memory the domU is using.
 > >How-To-Repeat:
 > # sysctl -w machdep.xen.balloon.target=1048576  
 > machdep.xen.balloon.target: 2621440 -> 1048576
 > # dmesg | tail -1
 > balloon0: error 13, couldn't write xenbus target node
 
 Looks like Xen is rejecting the change. Does your fedora 17 run on the
 same dom0 ?
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --