Hi List, It seems that the xen balloon functionality for guest is not enabled in CentOS 3.4.50-8.el6 xen kernel by default via centos-release-xen.x86_64 repo. I think this should have been present since this extra Xen repo needs to support as both Guest and Host (Dom0). The kernel had to be recompiled with CONFIG_XEN_SELFBALLOONING. How can I request to make it default enable in centos repo ? or is there any reason to not have it default ? Thanks. On Fri, Jul 12, 2013 at 7:42 PM, Rushikesh Jadhav <2rushikeshj at gmail.com>wrote: > Hi List, > > I'm trying to work out the balloon driver on CentOS6 HVM but it seems to > be not working with default 2.6.32 or newer 3.4 kernel. > > Does balloon driver work on HVM linux guests with Linux Kernel 3.4 from > centos repo ? > > PV is fine and is able to balloon. > > My host is Xen 4.1.2 with dom0 as 3.4.46-8.el6.centos.alt.x86_64 > My guest is CentOS6.4 with kernel 3.4.46-8.el6.centos.alt.x86_64 > > Please have a look at below guest logs, > [root at hvmc6 ~]# uname -a Linux hvmc6 3.4.50-8.el6.centos.alt.x86_64 #1 > SMP Fri Jun 21 03:14:22 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux > [root at hvmc6 ~]# xenstore-ls memory initial-reservation = "1193984" > initial-target = "1048576" static-max = "16777216" target = "1048576" > dynamic-min = "1048576" dynamic-max = "1048576" memory-offset = "-258100" > [root at hvmc6 ~]# dmesg | grep -i balloon xen/balloon: Initialising balloon > driver. xen-balloon: Initialising balloon driver. > [root at hvmc6 ~]# free -m total used free shared buffers cached Mem: 463 > 221 241 0 24 13 -/+ buffers/cache: 184 278 Swap: 9987 7 9980 > > > When I try to set it manually from host, I get > # xl mem-set 229 2049 xc: error: do_memory_op: WARNING: op=16 not > converted to safe ioctls: Internal error > > Anyone has made CentOS6 PVHVM work with ballooning on Xen ? > > Thanks. > Rushikesh > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20130716/dc675fc4/attachment-0006.html>