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    SubjectRe: [PATCH 1/6] freepgt: free_pgtables use vma list
    On Fri, 25 Mar 2005 09:23:12 -0800
    "David S. Miller" <davem@davemloft.net> wrote:

    > On Fri, 25 Mar 2005 16:32:07 +1100
    > Nick Piggin <nickpiggin@yahoo.com.au> wrote:
    >
    > > So, to make the question more concrete: if a pgd_t is freed due
    > > to freeing the single pmd_t contained within it (which was the
    > > only part of the pgd's address space that contained a valid mapping)
    > > Then do you need the full PGDIR_SIZE width passed to
    > > flush_tlb_pgtables, or just the PMD_SIZE'd start,end that covered
    > > the freed pmd_t?
    >
    > Just the PMD_SIZE'd start,end is necessary.

    Since sparc64 is the only user of this thing...

    Let's make it so that the flush can be queued up
    at pmd_clear() time, as that's what we really want.

    Something like:

    pmd_clear(mm, vaddr, pmdp);

    I'll try to play with something like this later.
    -
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