[RFC,v2,01/19] mm: add new flag to enable ksm per process

Message ID	20230210215023.2740545-2-shr@devkernel.io (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: Stefan Roesch <shr@devkernel.io> To: kernel-team@fb.com Cc: shr@devkernel.io, linux-mm@kvack.org, riel@surriel.com, mhocko@suse.com, david@redhat.com, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, akpm@linux-foundation.org Subject: [RFC PATCH v2 01/19] mm: add new flag to enable ksm per process Date: Fri, 10 Feb 2023 13:50:05 -0800 Message-Id: <20230210215023.2740545-2-shr@devkernel.io> In-Reply-To: <20230210215023.2740545-1-shr@devkernel.io> References: <20230210215023.2740545-1-shr@devkernel.io> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	mm: process/cgroup ksm support \| expand [RFC,v2,00/19] mm: process/cgroup ksm support [RFC,v2,01/19] mm: add new flag to enable ksm per process [RFC,v2,02/19] mm: add flag to __ksm_enter [RFC,v2,03/19] mm: add flag to __ksm_exit call [RFC,v2,04/19] mm: invoke madvise for all vmas in scan_get_next_rmap_item [RFC,v2,05/19] mm: support disabling of ksm for a process [RFC,v2,06/19] mm: add new prctl option to get and set ksm for a process [RFC,v2,07/19] mm: split off pages_volatile function [RFC,v2,08/19] mm: expose general_profit metric [RFC,v2,09/19] docs: document general_profit sysfs knob [RFC,v2,10/19] mm: calculate ksm process profit metric [RFC,v2,11/19] mm: add ksm_merge_type() function [RFC,v2,12/19] mm: expose ksm process profit metric in ksm_stat [RFC,v2,13/19] mm: expose ksm merge type in ksm_stat [RFC,v2,14/19] docs: document new procfs ksm knobs [RFC,v2,15/19] tools: add new prctl flags to prctl in tools dir [RFC,v2,16/19] selftests/vm: add KSM prctl merge test [RFC,v2,17/19] selftests/vm: add KSM get merge type test [RFC,v2,18/19] selftests/vm: add KSM fork test [RFC,v2,19/19] selftests/vm: add two functions for debugging merge outcome

Message ID

20230210215023.2740545-2-shr@devkernel.io (mailing list archive)

State

New

Headers

From: Stefan Roesch <shr@devkernel.io>
To: kernel-team@fb.com
Cc: shr@devkernel.io,
	linux-mm@kvack.org,
	riel@surriel.com,
	mhocko@suse.com,
	david@redhat.com,
	linux-kselftest@vger.kernel.org,
	linux-doc@vger.kernel.org,
	akpm@linux-foundation.org
Subject: [RFC PATCH v2 01/19] mm: add new flag to enable ksm per process
Date: Fri, 10 Feb 2023 13:50:05 -0800
Message-Id: <20230210215023.2740545-2-shr@devkernel.io>
In-Reply-To: <20230210215023.2740545-1-shr@devkernel.io>
References: <20230210215023.2740545-1-shr@devkernel.io>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Sender: owner-linux-mm@kvack.org
Precedence: bulk

Series

mm: process/cgroup ksm support | expand

Commit Message

Stefan Roesch Feb. 10, 2023, 9:50 p.m. UTC

This introduces the new flag MMF_VM_MERGE_ANY flag. When this flag is
set, kernel samepage merging (ksm) gets enabled for all vma's of a
process.

Signed-off-by: Stefan Roesch <shr@devkernel.io>
---
 include/linux/sched/coredump.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h
index 0e17ae7fbfd3..0ee96ea7a0e9 100644
--- a/include/linux/sched/coredump.h
+++ b/include/linux/sched/coredump.h
@@ -90,4 +90,5 @@  static inline int get_dumpable(struct mm_struct *mm)
 #define MMF_INIT_MASK		(MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
 				 MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK)
 
+#define MMF_VM_MERGE_ANY	29
 #endif /* _LINUX_SCHED_COREDUMP_H */

[RFC,v2,01/19] mm: add new flag to enable ksm per process

Commit Message

Patch