[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Disallow setting maxmem to higher value than total physical memory size
On 09/01/2010 05:44 AM, Ian Campbell wrote: > On Wed, 2010-09-01 at 13:31 +0100, Michal Novotny wrote: >> Hi, >> this is the patch to disallow changing the maxmem value to higher value >> than total physical memory size since without this patch I was able to >> set dom0 maxmem to higher (invalid) value which is not correct. > I think it is allowable for a domU though. Consider the scenario where > you have two hosts, one of which has more physical RAM than the other. > You may which to boot a domain on the smaller host, (i.e. booting > ballooned with a current_pages suitable for the small host) and then > migrate it to the large machine where you then want to be able to > balloon to a value larger than was even possible on the previous > machine. But max-mem can change between hosts; on the small host it needn't have a maxmem larger than the host's memory. (The domain itself may have a larger notion of maxmem internally, but that's separate.) J _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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