Messages in this thread | | | Date | Mon, 3 Mar 2003 08:50:34 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [patch] remap-file-pages-2.5.63-A0 |
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On Mon, 3 Mar 2003, Ingo Molnar wrote: > > the attached patch, against BK-curr, is a preparation to make > remap_file_pages() usable on swappable vmas as well. When 'swapping out' > shared-named mappings the page offset is written into the pte. > > it takes one bit from the swap-type bits, otherwise it does not change the > pte layout - so it should be easy to adapt any other architecture to this > change as well. (this patch does not introduce the protection-bits-in-pte > approach used in my previous patch.)
One question: Why?
What's wrong with just using the value we use now (0), and just calculating the page from the vma/offset information? Why hide the offset in the page tables, when there is no need for it?
Linus
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