Messages in this thread |  | | Date | Thu, 04 Jan 2001 21:45:43 +1300 | From | david <> | Subject | big memory maping problim |
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hi i have kernel 2.2.18
i need a dma buffer (dose not have to be linear)
so i used vmalloc to get the space then i need to make it non_cache so i found cr3 the got the page entry and got the phys page address also setting bit 4 of the page entry to disable caching and then reloading cr3 when i had done all the pages to reset the tlb's this worked fine but now i need to shear the mem with a user program so in my driver mmap function
i got vm->start and current ->tss->cr3 this give me to page entree witch i then set to the phys addr of the above pages this seam's to work fine
is their any thing else i need to do ?
remap_pages_range did not work on this mem but dose work on other address spaces ?
Thank You
David Rundle <sector2@ihug.co.nz>
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