Messages in this thread | | | Date | Thu, 17 Oct 2002 15:24:49 -0400 | From | Brian Gerst <> | Subject | Re: kernel vaddr -> struct page |
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Eric Barton wrote: > Hi, > > I'm trying to turn a kernel virtual address into a struct page that I can > then pass to tcp_sendpage(). > > The kernel virtual address could be {kmalloc(),vmalloc(),kmap()}-ed memory, > and I guarantee that this memory will not be {kfree(),vfree(),kunmap()}-ed > until the socket has done with the page (i.e. all the data has been acked). > > I'd have thought that vmalloc_to_page(kvaddr) should give me a page I could > use, since it is walking the page tables to find the pte for 'kvaddr', and > checking that the physical page is present. > > However I find I'm sending garbage when I use this method. > > Can anyone help me understand? >
virt_to_page()
-- Brian Gerst
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