Re: [PATCH v4 3/3] RISC-V: Issue a tlb page flush if possible

Christoph Hellwig
2019-08-22T08:11:57Z

On Thu, Aug 22, 2019 at 12:51:51AM -0700, Atish Patra wrote:
> If tlbflush request is for page only, there is no need to do a
> complete local tlb shootdown.
>
> Just do a local tlb flush for the given address.

Looks good, although I suspect in many cases even doing multiple
single-page sfence.vma calls might be cheaper than the global one.

But I think that is worth a ѕeparate discussion, preferably with actual
numbers.

Reviewed-by: Christoph Hellwig <hch@lst.de>