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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230418152849.505124-1-david@redhat.com>
Date:   Tue, 18 Apr 2023 17:28:46 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linux-s390@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stefan Roesch <shr@...kernel.io>,
        Rik van Riel <riel@...riel.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Shuah Khan <shuah@...nel.org>
Subject: [PATCH v1 0/3] mm/ksm: improve PR_SET_MEMORY_MERGE=0 handling and cleanup disabling KSM

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@...ux-foundation.org>
Cc: Stefan Roesch <shr@...kernel.io>
Cc: Rik van Riel <riel@...riel.com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Christian Borntraeger <borntraeger@...ux.ibm.com>
Cc: Janosch Frank <frankja@...ux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc: Heiko Carstens <hca@...ux.ibm.com>
Cc: Vasily Gorbik <gor@...ux.ibm.com>
Cc: Sven Schnelle <svens@...ux.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Shuah Khan <shuah@...nel.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