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[V2,0/2] arm64/mm: Enable THP migration

Message ID 1599627183-14453-1-git-send-email-anshuman.khandual@arm.com (mailing list archive)
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Series arm64/mm: Enable THP migration | expand

Message

Anshuman Khandual Sept. 9, 2020, 4:53 a.m. UTC 
This series enables THP migration on arm64 via ARCH_ENABLE_THP_MIGRATION.
But first this modifies all existing THP helpers like pmd_present() and
pmd_trans_huge() etc per expected generic memory semantics as concluded
from a previous discussion here.

https://lkml.org/lkml/2018/10/9/220

This series is based on v5.9-rc4.

Changes in V2:

- Renamed clr_pmd_bit() as clear_pmd_bit() per Catalin
- Updated in-code documentation per Catalin and Ralph
- Updated commit message in the first patch per Catalin
- Updated commit message in the second patch per Catalin
- Added tags from Catalin

Changes in V1: (https://patchwork.kernel.org/project/linux-mm/list/?series=333627)

- Used new PMD_PRESENT_INVALID (bit 59) to represent invalidated PMD state per Catalin

Changes in RFC V2: (https://patchwork.kernel.org/project/linux-mm/list/?series=302965)

- Used PMD_TABLE_BIT to represent splitting PMD state per Catalin

Changes in RFC V1: (https://patchwork.kernel.org/project/linux-mm/list/?series=138797)

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org

Anshuman Khandual (2):
  arm64/mm: Change THP helpers to comply with generic MM semantics
  arm64/mm: Enable THP migration

 arch/arm64/Kconfig                    |  4 +++
 arch/arm64/include/asm/pgtable-prot.h |  7 +++++
 arch/arm64/include/asm/pgtable.h      | 39 ++++++++++++++++++++++++---
 3 files changed, 47 insertions(+), 3 deletions(-)

Comments

Will Deacon Sept. 11, 2020, 3:31 p.m. UTC | #1 
On Wed, 9 Sep 2020 10:23:01 +0530, Anshuman Khandual wrote:
> This series enables THP migration on arm64 via ARCH_ENABLE_THP_MIGRATION.
> But first this modifies all existing THP helpers like pmd_present() and
> pmd_trans_huge() etc per expected generic memory semantics as concluded
> from a previous discussion here.
> 
> https://lkml.org/lkml/2018/10/9/220
> 
> [...]

Applied to arm64 (for-next/mm), thanks!

[1/2] arm64/mm: Change THP helpers to comply with generic MM semantics
      https://git.kernel.org/arm64/c/b65399f6111b
[2/2] arm64/mm: Enable THP migration
      https://git.kernel.org/arm64/c/53fa117bb33c

Cheers,