Re: [RFC PATCH 1/2] zap_pte_range: update addr when forcing flush after TLB batching faiure

Linus Torvalds
2014-10-28T21:33:01Z

On Tue, Oct 28, 2014 at 2:16 PM, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
>>
>> Can't you just do a full invalidate and a SW IPI for larger ranges?
>
> For us, this would be great except ... we can potentially have other
> agents with an MMU that only support snooping of the broadcasts...

Ugh. Oh well. I guess on power you need to walk all the hashed entries
individually _anyway_, so there's no way you could really use a
range-based or "invalidate all" model to avoid some of the work.

Linus