[PATCH v1 0/3] mm/ksm: improve PR_SET_MEMORY_MERGE=0 handling and cleanup disabling KSM

David Hildenbrand
2023-04-18T15:30:04Z

This is a follow-up to [1]:
[PATCH v9 0/3] mm: process/cgroup ksm support

which is not in mm-unstable yet (but soon? :) ). I'll be on vacation for
~2 weeks, so sending it out now as reply to [1].

(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.

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: Andrew Morton <akpm@linux-foundation.org>
Cc: Shuah Khan <shuah@kernel.org>

[1] https://lkml.kernel.org/r/20230418051342.1919757-1-shr@devkernel.io

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 | 7 +--
mm/ksm.c | 58 +++++++++++++++++++
.../selftests/mm/ksm_functional_tests.c | 46 +++++++++++++--
5 files changed, 107 insertions(+), 31 deletions(-)

--
2.39.2