On Fri, 25 Mar 2005 09:23:12 -0800
"David S. Miller" <[email protected]> wrote:
> On Fri, 25 Mar 2005 16:32:07 +1100
> Nick Piggin <[email protected]> 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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