linux-kernel - [PATCH 0/3] Optimize mremap() by PTE-batching

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: <20250506050056.59250-1-dev.jain@arm.com>
Date: Tue,  6 May 2025 10:30:53 +0530
From: Dev Jain <dev.jain@....com>
To: akpm@...ux-foundation.org
Cc: Liam.Howlett@...cle.com,
	lorenzo.stoakes@...cle.com,
	vbabka@...e.cz,
	jannh@...gle.com,
	pfalcato@...e.de,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	david@...hat.com,
	peterx@...hat.com,
	ryan.roberts@....com,
	mingo@...nel.org,
	libang.li@...group.com,
	maobibo@...ngson.cn,
	zhengqi.arch@...edance.com,
	baohua@...nel.org,
	anshuman.khandual@....com,
	willy@...radead.org,
	ioworker0@...il.com,
	yang@...amperecomputing.com,
	Dev Jain <dev.jain@....com>
Subject: [PATCH 0/3] Optimize mremap() by PTE-batching

Use PTE batching to optimize mremap().

Mapping 512K of memory, memsetting it, remapping it to src + 512K, and
munmapping it 10,000 times, the average execution time reduces from 1.9 to
1.2 seconds, giving a 37% performance optimization. (Apple M3)

Dev Jain (3):
  mm: Call pointers to ptes as ptep
  mm: Add generic helper to hint a large folio
  mm: Optimize mremap() by PTE batching

 include/linux/pgtable.h | 16 +++++++++++++++
 mm/mremap.c             | 44 +++++++++++++++++++++++++++--------------
 2 files changed, 45 insertions(+), 15 deletions(-)

-- 
2.30.2