On 9/8/26 8:50 PM, Kiryl Shutsemau wrote:
From: "Kiryl Shutsemau (Meta)" <[email protected]> Checking that an address range is backed by a folio of a given order is useful to any test that builds or collapses large folios. mTHP collapse coverage in the khugepaged selftest needs exactly that. split_huge_page_test.c already has the building block: is_backed_by_folio() reads the compound head and tail flags from /proc/kpageflags to classify the folio behind a page. Move it into vm_util so other tests can use it. No functional change. Assisted-by: LLM Acked-by: Mike Rapoport (Microsoft) <[email protected]> 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]>
