[Xen-API] Dynamic Memory Allocation Constant Flux

[Jim Uriarte <uriarte@xxxxxxxxx>]

I have setup my guests to use the dynamic memory range feature and am seeing 
them constantly fluctuate between two states when the host is under allocated.

I am using XenCenter to view/control my XCP 1.6 Îeta install.  It doesn't 
appear that the guest are actually changing the amount of memory that they have 
in them, according to the guest OSes, but I am not sure.  

If nothing else, it's confusing, but it appears to be a bug of some sort.  

These are the logs I am seeing over and over in /var/log/messages

Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|FdoBalloon: Target = 0 
page(s)
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|BalloonAdjust: ====> 
(97075 page(s))
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|BalloonDeflate: ====> 
97075 page(s)
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 8185 page(s) at 8185000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
8185 page(s) at 545666 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePhysmap: 7040 page(s) at 7040000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: 
XENBUS|__BalloonPopulatePfnArray: 7040 page(s) at 7040000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|__BalloonFreePfnArray: 
7040 page(s) at 7040000 pages/s
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|BalloonDeflate: <==== 
97075 page(s) in 171ms
Nov  1 19:53:38 ashenvale fe: qemu-dm-2[11267]: XENBUS|BalloonAdjust: <==== (0 
page(s))



I have used XenServer in the past but am new to XCP and this mailing list.  

Thanks for any help,

Jim
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