On 07.05.24 13:34, David Hildenbrand wrote:
On 07.05.24 13:26, Ryan Roberts wrote:
On 07/05/2024 12:14, Ryan Roberts wrote:
On 07/05/2024 12:13, David Hildenbrand wrote:
https://github.com/intel/lmbench/blob/master/src/lat_mem_rd.c#L95
suggest. If you want to try something semi-randomly; it might be useful to rule
out the arm64 contpte feature. I don't see how that would be interacting here if
mTHP is disabled (is it?). But its new for 6.9 and arm64 only. Disable with
ARM64_CONTPTE (needs EXPERT) at compile time.
I don't enabled mTHP, so it should be not related about ARM64_CONTPTE,
but will have a try.
cont-pte can get active if we're just lucky when allocating pages in the right
order, correct Ryan?
No it shouldn't do; it requires the pages to be in the same folio.
Ah, my memory comes back. That's also important for folio_pte_batch() to
currently work as expected I think. We could change that, though, and
let cont-pte batch across folios.
Thinking about it (and trying to refresh my memories), access/dirty bits
might be why we don't want to do that.
--
Cheers,
David / dhildenb
