Messages in this thread | | | From | Peter Desnoyers <> | Subject | Re: Mapping from user VA to kernel VA... | Date | Wed, 24 Nov 1999 06:39:11 -0500 (EST) |
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Raj, Ashok wrote: > > Hello. > > I have a need to do the following. > > User process sends the his virtual address to kernel. > > Kernel locks memory down and now has the list of physical pages. > > What should i do so that i can get a kernel linear address, that maps to the > same physical page?
Use kiovecs. If you're doing it in 2.2, you'll need Steven Tweedie's rawio patch; it's already in 2.3. You'll also need to modify the patch to separate probing the pages from locking them for I/O, if you aren't going to immediately do I/O on them and then release them.
-- ............................................................................ Peter Desnoyers 162 Pleasant St. (617) 661-1979 pjd@fred.cambridge.ma.us Cambridge, Mass. 02139 (978) 461-0402 (work) pjd@giga-net.com
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