On Mon, 12 Oct 2020 08:54:31 +0000 (UTC), Christophe Leroy wrote:
> The kernel expects pte_young() to work regardless of CONFIG_SWAP.
>
> Make sure a minor fault is taken to set _PAGE_ACCESSED when it
> is not already set, regardless of the selection of CONFIG_SWAP.
>
> This adds at least 3 instructions to the TLB miss exception
> handlers fast path. Following patch will reduce this overhead.
>
> [...]
Applied to powerpc/fixes.
[1/2] powerpc/8xx: Always fault when _PAGE_ACCESSED is not set
https://git.kernel.org/powerpc/c/29daf869cbab69088fe1755d9dd224e99ba78b56
[2/2] powerpc/8xx: Manage _PAGE_ACCESSED through APG bits in L1 entry
https://git.kernel.org/powerpc/c/33fe43cfd9b1c20f6f9899b44bf04e91823ff1c9
cheers
