[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] can not use all available memory
On Fri, Nov 23, 2012 at 12:21:32PM +0000, Ian Campbell wrote: > This question belongs on xen-users. > > On Fri, 2012-11-23 at 11:35 +0000, Alexander Bienzeisler wrote: > > Hello, > > > > i just tried to add a domU with 16 gigs of ram (maxmem = 16384, memory = > > 16384) with free_memory : 28969 but got an error: > > > > libxl: error: libxl.c:3433:libxl_set_memory_target: new target 0 for > > dom0 is below the minimum threshold > > The clue is in this message -- you cannot safely balloon down a guest > (including dom0) to an arbitrarily small value relative to its initial > size. The kernel will have certain fixed datastructures etc which are > sized according to the maximum amount of RAM at start of day. > > If you were to balloon down too low then you would run out of RAM and > the OOM killer would step in and start killing stuff, so xl includes a > safety catch which prevents this. > > If you have a huge host and want a small dom0 use the dom0_mem option > and disable xl's autoballoon option or whatever the equivalent xend > option is. > I think he was already using dom0_mem. He had 28969 free in Xen as reported by "xl info". -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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