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Date: Thu, 26 Apr 2018 10:27:55 -0400
From: Zi Yan <zi.yan@...t.com>
To: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc: Zi Yan <zi.yan@...rutgers.edu>, Vineet Gupta <vgupta@...opsys.com>,
linux-snps-arc@...ts.infradead.org,
Russell King <linux@...linux.org.uk>,
Christoffer Dall <christoffer.dall@...aro.org>,
Marc Zyngier <marc.zyngier@....com>,
linux-arm-kernel@...ts.infradead.org,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Steve Capper <steve.capper@....com>,
Kristina Martsenko <kristina.martsenko@....com>,
Dan Williams <dan.j.williams@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
x86@...nel.org, Ralf Baechle <ralf@...ux-mips.org>,
James Hogan <jhogan@...nel.org>,
Michal Hocko <mhocko@...e.com>, linux-mips@...ux-mips.org,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>,
"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
Ram Pai <linuxram@...ibm.com>,
Balbir Singh <bsingharora@...il.com>,
Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
linuxppc-dev@...ts.ozlabs.org,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Janosch Frank <frankja@...ux.vnet.ibm.com>,
linux-s390@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
sparclinux@...r.kernel.org, "Huang, Ying" <ying.huang@...el.com>
Subject: [RFC PATCH 0/9] Enable THP migration for all possible architectures
From: Zi Yan <zi.yan@...rutgers.edu>
Hi all,
THP migration is only enabled on x86_64 with a special
ARCH_ENABLE_THP_MIGRATION macro. This patchset enables THP migration for
all architectures that uses transparent hugepage, so that special macro can
be dropped. Instead, THP migration is enabled/disabled via
/sys/kernel/mm/transparent_hugepage/enable_thp_migration.
I grepped for TRANSPARENT_HUGEPAGE in arch folder and got 9 architectures that
are supporting transparent hugepage. I mechanically add __pmd_to_swp_entry() and
__swp_entry_to_pmd() based on existing __pte_to_swp_entry() and
__swp_entry_to_pte() for all these architectures, except tile which is going to
be dropped.
I have successfully compiled all these architectures, but have NOT tested them
due to lack of real hardware. I appreciate your help, if the maintainers of
these architectures can do a quick test with the code from
https://github.com/x-y-z/thp-migration-bench . Please apply patch 9 as well
to enable THP migration.
By enabling THP migration, migrating a 2MB THP on x86_64 machines takes only 1/3
time of migrating equivalent 512 4KB pages.
Hi Naoya, I also add soft dirty support for powerpc and s390. It would be great
if you can take a look at patch 6 & 7.
Feel free to give comments. Thanks.
Cc: linux-mm@...ck.org
Cc: Vineet Gupta <vgupta@...opsys.com>
Cc: linux-snps-arc@...ts.infradead.org
Cc: Russell King <linux@...linux.org.uk>
Cc: Christoffer Dall <christoffer.dall@...aro.org>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
Cc: Steve Capper <steve.capper@....com>
Cc: Kristina Martsenko <kristina.martsenko@....com>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: x86@...nel.org
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: James Hogan <jhogan@...nel.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: linux-mips@...ux-mips.org
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc: Ram Pai <linuxram@...ibm.com>
Cc: Balbir Singh <bsingharora@...il.com>
Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Janosch Frank <frankja@...ux.vnet.ibm.com>
Cc: linux-s390@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>
Cc: sparclinux@...r.kernel.org
Cc: "Huang, Ying" <ying.huang@...el.com>
Zi Yan (9):
arc: mm: migrate: add pmd swap entry to support thp migration.
arm: mm: migrate: add pmd swap entry to support thp migration.
arm64: mm: migrate: add pmd swap entry to support thp migration.
i386: mm: migrate: add pmd swap entry to support thp migration.
mips: mm: migrate: add pmd swap entry to support thp migration.
powerpc: mm: migrate: add pmd swap entry to support thp migration.
s390: mm: migrate: add pmd swap entry to support thp migration.
sparc: mm: migrate: add pmd swap entry to support thp migration.
mm: migrate: enable thp migration for all possible architectures.
arch/arc/include/asm/pgtable.h | 2 ++
arch/arm/include/asm/pgtable.h | 2 ++
arch/arm64/include/asm/pgtable.h | 2 ++
arch/mips/include/asm/pgtable-64.h | 2 ++
arch/powerpc/include/asm/book3s/32/pgtable.h | 2 ++
arch/powerpc/include/asm/book3s/64/pgtable.h | 17 ++++++++++++
arch/powerpc/include/asm/nohash/32/pgtable.h | 2 ++
arch/powerpc/include/asm/nohash/64/pgtable.h | 2 ++
arch/s390/include/asm/pgtable.h | 5 ++++
arch/sparc/include/asm/pgtable_32.h | 2 ++
arch/sparc/include/asm/pgtable_64.h | 2 ++
arch/x86/Kconfig | 4 ---
arch/x86/include/asm/pgtable-2level.h | 2 ++
arch/x86/include/asm/pgtable-3level.h | 2 ++
arch/x86/include/asm/pgtable.h | 2 --
fs/proc/task_mmu.c | 2 --
include/asm-generic/pgtable.h | 21 ++-------------
include/linux/huge_mm.h | 9 +++----
include/linux/swapops.h | 4 +--
mm/Kconfig | 3 ---
mm/huge_memory.c | 27 +++++++++++++-------
mm/migrate.c | 6 ++---
mm/rmap.c | 5 ++--
23 files changed, 73 insertions(+), 54 deletions(-)
--
2.17.0
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