On Mon, 21 Mar 2005, David S. Miller wrote:
On Tue, 22 Mar 2005 15:14:54 +1100
Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
Question, Dave: flush_tlb_pgtables after Hugh's patch is also
possibly not being called with enough range to cover all page
tables that have been freed.
Good question from Nick.
For example, you may have a single page (start,end) address range
to free, but if this is enclosed by a large enough (floor,ceiling)
then it may free an entire pgd entry.
I assume the intention of the API would be to provide the full
pgd width in that case?
It just wants the range of page tables liberated. I guess
essentially PMD_SIZE is the granularity.
I _think_ that answer means that my current code is fine in this respect.
But I'm not entirely convinced. Since sparc64 is the only architecture
which implements a flush_tlb_pgtables which actually uses start,end,
we do need to suit your needs there - informed reassurance welcome!