mm/ksm: Fix incorrect accounting of KSM counters during fork.
Status from this message: [merged mm-stable] selftests-mm-added-fork-inheritance-test-for-ksm_merging_pages-counter.patch removed from -mm tree
Get series with b4
b4 am [email protected]Versions newest first · linked by author and title
- v3 Latest2 patches 0 repliesApplied 2/2
- v23 patches 13 repliesSuperseded
Changes in v3 from the cover letter
- Added Reviewed-by and Acked-by tags
- Added cleanup on exit in ksm_merging_pages test.
- Dropped test_fork_global_ksm_zero_pages_count because it can give false failures if multiple processes attempt KSM zero-page merging and unmerging during test execution.
Patches in v3 All 2 applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | mm/ksm: Fix incorrect KSM counter handling in mm_struct during forkinclude/ | +7 | 0 replies | Applied |
| 2/2 | selftests/mm: Added fork inheritance test for ksm_merging_pages countertools/ | +42 | 0 replies | Applied |
Reviews trailers per patch
All 2 patches have a Reviewed-by or Acked-by.
| Patch | Chengming Zhou | David Hildenbrand |
|---|---|---|
| 1/2 | R-b | A-b |
| 2/2 | A-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v3 0/2] mm/ksm: Fix incorrect accounting of KSM counters during fork.
The first patch in this series fixes the incorrect accounting of KSM counters such as ksm_merging_pages, ksm_rmap_items, and the global ksm_zero_pages during fork.
The following patch added a selftest to verify the ksm_merging_pages counter was updated correctly during fork.
Test Results
============
Without the first patch
-----------------------
# [RUN] test_fork_ksm_merging_page_count
not ok 10 ksm_merging_page in child: 32
With the first patch
--------------------
# [RUN] test_fork_ksm_merging_page_count
ok 10 ksm_merging_pages is not inherited after fork
Changes:
V2 -> v3:
- Added Reviewed-by and Acked-by tags
- Added cleanup on exit in ksm_merging_pages test.
- Dropped test_fork_global_ksm_zero_pages_count because it can give false failures if multiple processes attempt KSM zero-page merging and unmerging during test execution.
v2: https://lore.kernel.org/all/[email protected]/#t
Donet Tom (2):
mm/ksm: Fix incorrect KSM counter handling in mm_struct during fork selftests/mm: Added fork inheritance test for ksm_merging_pages
counter
include/linux/ksm.h | 8 +++- .../selftests/mm/ksm_functional_tests.c | 43 ++++++++++++++++++- 2 files changed, 49 insertions(+), 2 deletions(-)
Signature · 1 line
2.51.0