linux-kernel - [RFC PATCH 0/3] Add PUD and kernel PTE level pagetable account

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Message-Id: <cover.1654271618.git.baolin.wang@linux.alibaba.com>
Date:   Sat,  4 Jun 2022 09:32:28 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     akpm@...ux-foundation.org
Cc:     baolin.wang@...ux.alibaba.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/3] Add PUD and kernel PTE level pagetable account

Hi,

Now we will miss to account the PUD level pagetable and kernel PTE level
pagetable, as well as missing to set the PG_table flags for these pagetable
pages, which will get an inaccurate pagetable accounting, and miss
PageTable() validation in some cases. So this patch set introduces 2 new
helpers to help to account PUD and kernel PTE pagetable pages.

Note there are still some architectures specific pagetable allocation
that need to account the pagetable pages, which need more investigation
and cleanup in future. Please help to review. Thanks.

Baolin Wang (3):
  mm: Factor out the pagetable pages account into new helper function
  mm: Add PUD level pagetable account
  mm: Add kernel PTE level pagetable pages account

 arch/arm64/include/asm/tlb.h    |  5 ++++-
 arch/csky/include/asm/pgalloc.h |  2 +-
 arch/microblaze/mm/pgtable.c    |  2 +-
 arch/mips/include/asm/pgalloc.h | 11 ++++++++---
 arch/openrisc/mm/ioremap.c      |  2 +-
 arch/s390/include/asm/tlb.h     |  1 +
 arch/x86/mm/pgtable.c           |  3 +++
 include/asm-generic/pgalloc.h   | 18 ++++++++++++++++--
 include/linux/mm.h              | 24 ++++++++++++++++--------
 9 files changed, 51 insertions(+), 17 deletions(-)

-- 
1.8.3.1