linux-kernel - [PATCH v3 0/6] tlb: Fix (soft-)dirty bit management & clean up API

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Date:   Wed, 27 Jan 2021 23:53:41 +0000
From:   Will Deacon <will@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     kernel-team@...roid.com, linux-mm@...ck.org,
        Will Deacon <will@...nel.org>, Yu Zhao <yuzhao@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mohamed Alzayat <alzayat@...-sws.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Nadav Amit <namit@...are.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: [PATCH v3 0/6] tlb: Fix (soft-)dirty bit management & clean up API

Hi everyone,

This is version three of the patches I previously posted here:

v1:  https://lore.kernel.org/r/20201120143557.6715-1-will@kernel.org
v2:  https://lore.kernel.org/r/20201210121110.10094-1-will@kernel.org

The objective is to fix the lacklustre TLB invalidation on the clear_refs
path and then augment the mmu_gather API to make it more difficult to
abuse.

Although there are other patch series pending to address related issues, I
don't think this relatively straightforward set of fixes should be blocked
on them.

Will

Cc: Yu Zhao <yuzhao@...gle.com>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Mohamed Alzayat <alzayat@...-sws.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Cc: Nadav Amit <namit@...are.com>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: linux-mm@...ck.org

--->8

Will Deacon (6):
  mm: proc: Invalidate TLB after clearing soft-dirty page state
  tlb: mmu_gather: Remove unused start/end arguments from
    tlb_finish_mmu()
  tlb: mmu_gather: Introduce tlb_gather_mmu_fullmm()
  tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()
  tlb: arch: Remove empty __tlb_remove_tlb_entry() stubs
  x86/ldt: Use tlb_gather_mmu_fullmm() when freeing LDT page-tables

 arch/ia64/include/asm/tlb.h     |  4 ++--
 arch/sparc/include/asm/tlb_64.h |  1 -
 arch/x86/include/asm/tlb.h      |  1 -
 arch/x86/kernel/ldt.c           | 10 ++++++++--
 fs/exec.c                       |  4 ++--
 fs/proc/task_mmu.c              |  9 +++++----
 include/asm-generic/tlb.h       |  6 ++++--
 include/linux/mm_types.h        |  7 +++----
 mm/hugetlb.c                    | 18 ++----------------
 mm/madvise.c                    | 12 ++++++------
 mm/memory.c                     |  8 ++++----
 mm/mmap.c                       |  8 ++++----
 mm/mmu_gather.c                 | 31 +++++++++++++++++--------------
 mm/oom_kill.c                   |  6 +++---
 14 files changed, 60 insertions(+), 65 deletions(-)

-- 
2.30.0.365.g02bc693789-goog