diff options
| author | Kiryl Shutsemau (Meta) <kas@kernel.org> | 2026-09-19 01:24:42 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-12 21:26:35 -0700 |
| commit | d2a9d28f53852b16f0e9a99a6855a4e4bf12cb4e (patch) | |
| tree | 49f8868e9fafeaa5254e24ec74e27388c1870602 /tools/perf/scripts/python/parallel-perf.py | |
| parent | 6e9ed3d8fdd4325ea8367d44e160eeea021d6a36 (diff) | |
selftests/mm: parameterize the mixed-source collapse case by source order
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.
Link: https://lore.kernel.org/20260919002451.496763-13-kirill@shutemov.name
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Tested-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Tested-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Assisted-by: LLM
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: "David Hildenbrand (arm)" <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Hugh Dickens <hughd@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: kernel-team@meta.com
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Nico Pache (Red Hat) <nico.pache@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Diffstat (limited to 'tools/perf/scripts/python/parallel-perf.py')
0 files changed, 0 insertions, 0 deletions