[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: [PATCH][1/4] Enable 1GB for Xen HVM host page
On 24/02/2010 04:25, "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx> wrote: > When allocating guest memory without the patch, Xend will treat 3G-4G > as normal memory, ignoring the 3.75-4G MMIO hole. This patch modifies > MMIO start address to be 1GB aligned and could fix the issue. > > Indeed, this patch may have some influence to pure 32bit guest, > changing its max memory from 3.75G to 3G. > > Anyway, we can change it to alloc 2M pages between 3G and 4G if you > think this particular patch is improper. I would expect it to fall back to 2MB extents, and from there back to 4kB extents as necessary, for any range where: (a) the range to be allocated for is not 1GB-sized and -aligned; or (b) no 1GB extents are available from Xen's free pool. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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