On 9/8/26 8:51 PM, Kiryl Shutsemau wrote:
From: "Kiryl Shutsemau (Meta)" <[email protected]> The mTHP collapse cases only run when the caller names both the context and an order, so a plain ./khugepaged covers the PMD contexts on anon and nothing else. run_vmtests.sh pinned order 4 and covered no other. Run the mTHP cases once per supported anon THP order below the PMD when -c is absent, and pull that context into both the no-argument invocation and "all". Also: - -c still pins one order, and now says what is wrong instead of printing the usage text. An order at or below the -s source order is skipped: the sources would already be the size being asked for. - Both orders end up as array indices and shift counts, so -s and -c are range-checked before they get there. - The mTHP context has only anon cases, so a run that names a different mem_type -- "all:shmem", say -- drops it again rather than refusing to start. Naming both explicitly still refuses. - A case carries the order it was registered at, so a result names it: # Run test: collapse_single_mthp (mthp_khugepaged:anon, order 6) On x86-64 with 4K pages that is orders 2 through 8, and ./khugepaged goes from 29 results in 17 seconds to 77 in 29, so run_vmtests.sh can drop its pinned order-4 line. Assisted-by: LLM 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]>
