Hi,
you can look for help on lkml.
some experts opinion is required.
But this is a generic query or you have a specific situation? if yes,
u can detail the situation for analysis.
On 4/17/07, Thomas Christensen <thomasc@xxxxxxxxxxx> wrote:
Hi
On Tue, Apr 17, 2007 at 06:06:53PM +0530, Vivek Kutal wrote:
> On Sun, 2007-04-15 at 14:29 +0200, Thomas Christensen wrote:
> I Dont know if there is a direct api for this....
> but you can get it using the following logic (very long search :)).
>
> get the page frame no by --> kernel address >> PAGE_SHIFT
> get the struct page using -> mem_map + page frame no
>
> struct page->mapping->i_mmap will give you a linked list of
> vm_area_struct
>
> now for each vma
>
> ->mm->pdg will give you the pgd base
>
> now for each pte entry in the page table
>
> if (pte >> page_shift == kernel_address >> page_shift) {
> get virtual address for that particular pgd and pte entry(address
> translation logic).
> }
>
>
> can someone please verify this ?
>
>
> OR
> a simpler solution would be to maintain the list of user address of that
> page when you call vm_insert_page :).
This may be the best way :)
>
>
>
> ps: there are macros for some of the above steps.
Thanks for the info, it has given me good insight into the gory details
of the kernel.
Thomas
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