linux-kernel - [RFC PATCH 0/2] arm, tlbflush: avoid TLBI broadcast if page reused in write fault

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Message-Id: <20250915032946.33203-1-ying.huang@linux.alibaba.com>
Date: Mon, 15 Sep 2025 11:29:44 +0800
From: Huang Ying <ying.huang@...ux.alibaba.com>
To: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>
Cc: Huang Ying <ying.huang@...ux.alibaba.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Zi Yan <ziy@...dia.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Ryan Roberts <ryan.roberts@....com>,
	Yang Shi <yang@...amperecomputing.com>,
	"Christoph Lameter (Ampere)" <cl@...two.org>,
	Dev Jain <dev.jain@....com>,
	Barry Song <baohua@...nel.org>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	Kevin Brodsky <kevin.brodsky@....com>,
	Yin Fengwei <fengwei_yin@...ux.alibaba.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH 0/2] arm, tlbflush: avoid TLBI broadcast if page reused in write fault

This series is to optimize the system performance via avoiding TLBI
broadcast if page is reused in the write protect fault handler.  More
details of the background and the test results can be found in [2/2].

Huang Ying (2):
  mm: add spurious fault fixing support for huge pmd
  arm64, tlbflush: don't TLBI broadcast if page reused in write fault

 arch/arm64/include/asm/pgtable.h  | 14 ++++++++-----
 arch/arm64/include/asm/tlbflush.h | 33 +++++++++++++++++++++++++++++++
 arch/arm64/mm/fault.c             |  2 +-
 include/linux/pgtable.h           |  4 ++++
 mm/huge_memory.c                  | 25 +++++++++++++++++++----
 mm/internal.h                     |  4 ++--
 6 files changed, 70 insertions(+), 12 deletions(-)

Best Regards,
Huang, Ying