From: "David S. Miller" <davem@redhat.com>
Date: Mon, 20 May 2002 16:30:26 -0700 (PDT)
Architectures define tlb_flush_mm() as appropriate, on x86 it would
be just flush_tlb_mm(mm), on Sparc/PPC/etc. which uses the VMA
flushing it would just be a NOP.
Actually, there are some issues with my suggestion.
We are trying to do two things:
1) Flush all VMAs
2) Flush some unmapped area (1 or a few VMAs)
In the #1 case we'd like that to turn into something like:
flush_cache_mm()
for each vma {
unmap_page_range();
}
tlb_finish_mmu();
flush_tlb_mm();
Whereas in the #2 case it should look like:
for each vma {
tlb_start_vma(vma...);
tlb_end_vma(vma...);
}
tlb_finish_mmu();
We have to reposition that tlb.h:flush_tlb_mm() call somehow to
make this a reality.
The next issue is how to make it so that this infrstructure
can allow us to kill off the buggy flush_tlb_pgtables() thing.
-
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This archive was generated by hypermail 2b29 : Thu May 23 2002 - 22:00:20 EST