From: Kalesh Singh <kaleshsingh@google.com>
Cc: surenb@google.com, minchan@google.com, joelaf@google.com,
lokeshgidra@google.com, kaleshsingh@google.com,
kernel-team@android.com,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Kees Cook <keescook@chromium.org>,
Peter Zijlstra <peterz@infradead.org>,
Sami Tolvanen <samitolvanen@google.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Frederic Weisbecker <frederic@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Hassan Naveed <hnaveed@wavecomp.com>,
Christian Brauner <christian.brauner@ubuntu.com>,
Mark Rutland <mark.rutland@arm.com>,
Mike Rapoport <rppt@kernel.org>, Gavin Shan <gshan@redhat.com>,
Zhenyu Ye <yezhenyu2@huawei.com>, Jia He <justin.he@arm.com>,
John Hubbard <jhubbard@nvidia.com>,
William Kucharski <william.kucharski@oracle.com>,
Sandipan Das <sandipan@linux.ibm.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Ralph Campbell <rcampbell@nvidia.com>,
Mina Almasry <almasrymina@google.com>,
Ram Pai <linuxram@us.ibm.com>,
Dave Hansen <dave.hansen@intel.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Brian Geffon <bgeffon@google.com>,
SeongJae Park <sjpark@amazon.de>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org
Subject: [PATCH 0/5] Speed up mremap on large regions
Date: Wed, 30 Sep 2020 22:21:17 +0000 [thread overview]
Message-ID: <20200930222130.4175584-1-kaleshsingh@google.com> (raw)
mremap time can be optimized by moving entries at the PMD/PUD level if
the source and destination addresses are PMD/PUD-aligned and
PMD/PUD-sized. Enable moving at the PMD and PUD levels on arm64 and
x86. Other architectures where this type of move is supported and known to
be safe can also opt-in to these optimizations by enabling HAVE_MOVE_PMD
and HAVE_MOVE_PUD.
Observed Performance Improvements for remapping a PUD-aligned 1GB-sized
region on x86 and arm64:
- HAVE_MOVE_PMD is already enabled on x86 : N/A
- Enabling HAVE_MOVE_PUD on x86 : ~13x speed up
- Enabling HAVE_MOVE_PMD on arm64 : ~ 8x speed up
- Enabling HAVE_MOVE_PUD on arm64 : ~19x speed up
Altogether, HAVE_MOVE_PMD and HAVE_MOVE_PUD
give a total of ~150x speed up on arm64.
Kalesh Singh (5):
kselftests: vm: Add mremap tests
arm64: mremap speedup - Enable HAVE_MOVE_PMD
mm: Speedup mremap on 1GB or larger regions
arm64: mremap speedup - Enable HAVE_MOVE_PUD
x86: mremap speedup - Enable HAVE_MOVE_PUD
arch/Kconfig | 7 +
arch/arm64/Kconfig | 2 +
arch/arm64/include/asm/pgtable.h | 1 +
arch/x86/Kconfig | 1 +
mm/mremap.c | 211 +++++++++++++++++---
tools/testing/selftests/vm/.gitignore | 1 +
tools/testing/selftests/vm/Makefile | 1 +
tools/testing/selftests/vm/mremap_test.c | 243 +++++++++++++++++++++++
tools/testing/selftests/vm/run_vmtests | 11 +
9 files changed, 448 insertions(+), 30 deletions(-)
create mode 100644 tools/testing/selftests/vm/mremap_test.c
--
2.28.0.709.gb0816b6eb0-goog
next reply other threads:[~2020-09-30 22:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 22:21 Kalesh Singh [this message]
2020-09-30 22:21 ` [PATCH 1/5] kselftests: vm: Add mremap tests Kalesh Singh
2020-10-01 7:24 ` John Hubbard
2020-10-01 15:46 ` Kalesh Singh
2020-10-01 18:36 ` John Hubbard
2020-09-30 22:21 ` [PATCH 2/5] arm64: mremap speedup - Enable HAVE_MOVE_PMD Kalesh Singh
2020-09-30 22:21 ` [PATCH 3/5] mm: Speedup mremap on 1GB or larger regions Kalesh Singh
2020-10-01 12:36 ` Kirill A. Shutemov
2020-10-01 16:40 ` Kalesh Singh
2020-10-01 18:10 ` Kalesh Singh
2020-09-30 22:21 ` [PATCH 4/5] arm64: mremap speedup - Enable HAVE_MOVE_PUD Kalesh Singh
2020-09-30 22:21 ` [PATCH 5/5] x86: " Kalesh Singh
2020-09-30 22:32 ` [PATCH 0/5] Speed up mremap on large regions Kirill A. Shutemov
2020-09-30 22:42 ` Lokesh Gidra
2020-09-30 22:46 ` Joel Fernandes
2020-09-30 23:03 ` Kalesh Singh
2020-10-01 12:27 ` Kirill A. Shutemov
2020-10-01 15:59 ` Kalesh Singh
2020-10-02 0:09 ` Lokesh Gidra
2020-10-02 5:35 ` Kirill A. Shutemov
2020-10-02 6:39 ` Lokesh Gidra
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