[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Linux question, user space virtual mem layout
hi,I am trying to allow dom0 to be mapped permanently in the top parts of all domU address spaces, to save some TLB flushes when doing I/O (on x86-32) and see how much that helps performance. So far I have managed to get the dom0 kernel, and a relinked user space, to live between 0xf0000000 and 0xfc000000 where Xen starts. But I have the problem that even though me user-space binaries are linked to reside in the 0xf0000000 -> 0xf6000000 virtual area, mmap() in Linux still likes to create mappings below 0xf0000000. Can anyone on this list tell me how I can instruct Linux not to go below a certain address when dealing out virtual mappings to user-space? Thanks in advance, Jacob _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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