On Thu, 31 Jan 2008, Robin Holt wrote: > On Thu, Jan 31, 2008 at 05:57:25PM -0800, Christoph Lameter wrote: > > Move page tables also needs to invalidate the external references > > and hold new references off while moving page table entries. > > I must admit to not having spent any time thinking about this, but aren't > we moving the entries from one set of page tables to the other, leaving > the pte_t entries unchanged. I guess I should go look, but could you > provide a quick pointer in the proper direction as to why we need to > recall externals when the before and after look of these page tables > will have the same information for the TLBs.
remap changes the address of pages in a process. The pages appear at another address. Thus the external pte will have the wrong information if not invalidated. Do a man mremap ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
