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Re: does pmd_offset return the physical address or virtual address of the page table?

This is what Mel Gormen says:

pgd_offset() takes an address and the mm_struct for the process and returns the PGD entry that covers the requested address. pmd_offset() takes a PGD entry and an address and returns the relevant PMD. pte_offset() takes a PMD and returns the relevant PTE.

Physical address space is flat, no concept of PGDs, PMDs and PTEs. So, the address returned by pmd_offset is virtual address as one would access it inside kernel.

Nitin


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