[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Memory allocation
> Upgraded my xen box to a gb of ram and had a bit of trouble expanding > usage with baloon and maxmem. I figure I'm just being blond so I cut > straight to teh chase and tweek the memory settings in the configuration > files for each vm. It should work... But you have to have set the max memory you might balloon to (I think the parameter is mem=) on the domain's kernel command line. If you don't do that, Linux will make its memory map to small and it won't be able to grow beyond its initial allocation. > everything goes fine except for the last domU. can't allocate memory is > the error reported. I check my math and I'm 5mb under my physical > memory. I go through a couple of small reductions of memory usage to no > avail. after a bigger decrease on the last domU memory allocation, all > domU's run. > > 1) how can one determine how much memory is really available for domU's? xm info tells you how much is *really* free in the machine > 2) how much memory is really used by a domU? Basically what its allocation is + a few (smallish) book-keeping structures in dom0 and Xen. Xen itself can take up to about 40MB (won't be quite that large on your machine). > 3) in the furture, could memory be allocated as a percentage of total > memory? That's a simple patch, so it's quite doable. Do you fancy starting a wishlist section on the wiki? Or filing a "wishlist" item in the bugzilla if such a thing exists (not sure it does at the moment). Cheers, mark _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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