On 9/19/26 8:24 AM, Kiryl Shutsemau wrote:
From: "Kiryl Shutsemau (Meta)" <[email protected]> collapse_order_mixed_sources() faults its region as order-2 folios and collapses them to the -c target. Order 2 is below the contpte size on every arm64 page size, so nothing in this suite collapses a contpte-mapped source on purpose. Let -s name the source order alongside -c. The case then faults at that order, keeping order 2 when -s is absent, and the source order has to be a supported mTHP order below the target. The other mTHP cases are unaffected: mthp_push_target_order() enables only the target order. A -c at or below -s is refused before any case runs: the sources would already be the size being asked for. Without the check the generic cases fail on that one by one instead of saying why. "-s 5 -c 7" on arm64/64K then collapses contpte-mapped sources into a larger mTHP. Assisted-by: LLM Acked-by: Lorenzo Stoakes (ARM) <[email protected]> Tested-by: Muhammad Usama Anjum <[email protected]> Signed-off-by: Kiryl Shutsemau (Meta) <[email protected]> ---
LGTM. Reviewed-by: Baolin Wang <[email protected]> Tested-by: Baolin Wang <[email protected]>
