Messages in this thread | | | From | David Hildenbrand <> | Subject | [PATCH mm-stable v2 0/3] mm/ksm: improve PR_SET_MEMORY_MERGE=0 handling and cleanup disabling KSM | Date | Sat, 22 Apr 2023 22:54:17 +0200 |
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This is a follow-up to [1]: [PATCH v9 0/3] mm: process/cgroup ksm support
which is now in mm-stable. Ideally we'd get at least patch #1 into the same kernel release as [1], so the semantics of setting PR_SET_MEMORY_MERGE=0 are unchanged between kernel versions.
(1) Make PR_SET_MEMORY_MERGE=0 unmerge pages like setting MADV_UNMERGEABLE does, (2) add a selftest for it and (3) factor out disabling of KSM from s390/gmap code.
v1 -> v2: - "mm/ksm: unmerge and clear VM_MERGEABLE when setting PR_SET_MEMORY_MERGE=0" -> Cleanup one if/else -> Add doc for ksm_disable_merge_any() - Added ACKs
[1] https://lkml.kernel.org/r/20230418051342.1919757-1-shr@devkernel.io
Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Stefan Roesch <shr@devkernel.io> Cc: Rik van Riel <riel@surriel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Janosch Frank <frankja@linux.ibm.com> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Shuah Khan <shuah@kernel.org>
David Hildenbrand (3): mm/ksm: unmerge and clear VM_MERGEABLE when setting PR_SET_MEMORY_MERGE=0 selftests/ksm: ksm_functional_tests: add prctl unmerge test mm/ksm: move disabling KSM from s390/gmap code to KSM code
arch/s390/mm/gmap.c | 20 +----- include/linux/ksm.h | 7 ++ kernel/sys.c | 12 +--- mm/ksm.c | 70 +++++++++++++++++++ .../selftests/mm/ksm_functional_tests.c | 46 ++++++++++-- 5 files changed, 121 insertions(+), 34 deletions(-)
-- 2.40.0
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