On Wed, 22 May 2002, Paul Mackerras wrote:
> I'm thinking now that I would be better off doing the batching by
> storing a list of virtual addresses needing flushing in the
> mmu_gather_t, instead of relying on getting at the special bits in the
> PTEs at some time after the tlb_remove_tlb_entry call.
Well, you can combine that with something like
static inline void tlb_remove_tlb_entry(tlb, pte, address)
{
if (pte_tlb_hash(pte)) {
if (tlb->start_addr == NOSTART)
tlb->start_addr = address;
tlb->end_addr = address+PAGE_SIZE;
}
}
and then have the tlb_end_vma() do something like
/* No pages mapped? */
if (tlb->start_addr == NOADDR)
return;
pte_remove_range(vma, tlb->start_addr, tlb->end_addr)
tlb->start_addr = NOADDR;
which will bunch them up on a vma granularity (if there is any reason to
do that), while still retaining the optimization that if a VMA was mostly
unmapped you wouldn't need to do a lot of hash table searching because of
the start/end thing.
Linus
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This archive was generated by hypermail 2b29 : Thu May 23 2002 - 22:00:23 EST