Messages in this thread | | | Subject | Re: [patch 1] Xen core patch : ptep_establish_new | Date | Thu, 18 Nov 2004 10:26:32 +0000 | From | Ian Pratt <> |
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> On Wed, Nov 17, 2004 at 11:46:50PM +0000, Ian Pratt wrote: > > > > This patch adds 'ptep_establish_new', in keeping with the > > existing 'ptep_establish', but for use where a mapping is being > > established where there was previously none present. This > > function is useful (rather than just using set_pte) because > > having the virtual address available enables a very important > > optimisation for arch-xen. We introduce > > HAVE_ARCH_PTEP_ESTABLISH_NEW and define a generic implementation > > in asm-generic/pgtable.h, following the pattern of the existing > > ptep_establish. > > What would be the problem of always passing the virtual address to > ptep_establish? We already have a rather twisted maze of pte manipulation > macros.
ptep_establish already takes a virtual address. Perhaps you mean 'set_pte'? That would work, but is a much bigger change that would impact all architectures. I think introducing ptep_establish_new is cleaner.
Ian
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