Re: [PATCH 00/16] Remove hash page table slot tracking from linux PTE

Ram Pai [off-list ref] writes:

On Mon, Oct 30, 2017 at 09:04:17AM +1100, Paul Mackerras wrote:

quoted

On Sat, Oct 28, 2017 at 03:35:32PM -0700, Ram Pai wrote:

quoted

I like the idea of not tracking the slots at all. It is something the
guest should not be knowing or tracking.

Why do you say that?

'slot' is a internal mechanism used by the hash table to accelerate
mapping an address to a hash-page.  If the hash-table implementation
choose to use a different mechanism to accelerate the mapping, it can't
because that mechanism is baked into the logic of all the consumers.

The slots are defined in the architecture, so it's entirely fine for
guests to track them.

cheers