Messages in this thread | | | From | Ulrich Weigand <> | Subject | Re: [PATCH] flush_cache_page while pte valid | Date | Tue, 12 Nov 2002 02:08:46 +0100 (MET) |
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Manfred Spraul wrote:
>Is it correct that this are 3 arch hooks that must appear back to back? >What about one hook with all parameters? > > pte = ptep_get_and_clear_and_flush(ptep, vma, address);
This interface would help us on s390 very much. We have a hardware instruction (INVALIDATE PAGE TABLE ENTRY) that implements the combination of pte = ptep_get_and_clear(ptep); flush_tlb_page(vma, address);
very efficiently, but we cannot use it to implement flush_tlb_page alone, because it requires the pte to be valid.
This is why our current in-tree flush_tlb_page is quite inefficient (it always flushes the complete TLB) ...
If we had a combined hook, we could use our IPTE instruction.
Bye, Ulrich
-- Dr. Ulrich Weigand weigand@informatik.uni-erlangen.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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