From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
npiggin@gmail.com, kaleshsingh@google.com,
joel@joelfernandes.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v6 11/11] powerpc/mm: Enable HAVE_MOVE_PMD support
Date: Mon, 24 May 2021 14:31:14 +0530 [thread overview]
Message-ID: <20210524090114.63446-12-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com>
mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
mremap time: 1122062ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
mremap time: 522062ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
mremap time: 523345ns
There is not much impact with HAVE_MOVE_PUD because the kernel by default
enables USE_SPLIT_PTE_PTLOCKS. That results in the optimized pud move being
disabled.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/powerpc/platforms/Kconfig.cputype | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 3ce907523b1e..2e666e569fdf 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -97,6 +97,8 @@ config PPC_BOOK3S_64
select PPC_HAVE_PMU_SUPPORT
select SYS_SUPPORTS_HUGETLBFS
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ select HAVE_MOVE_PMD
+ select HAVE_MOVE_PUD
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
select ARCH_SUPPORTS_NUMA_BALANCING
select IRQ_WORK
--
2.31.1
WARNING: multiple messages have this Message-ID (diff)
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org,
kaleshsingh@google.com, npiggin@gmail.com,
joel@joelfernandes.org,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v6 11/11] powerpc/mm: Enable HAVE_MOVE_PMD support
Date: Mon, 24 May 2021 14:31:14 +0530 [thread overview]
Message-ID: <20210524090114.63446-12-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com>
mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
mremap time: 1122062ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
mremap time: 522062ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
mremap time: 523345ns
There is not much impact with HAVE_MOVE_PUD because the kernel by default
enables USE_SPLIT_PTE_PTLOCKS. That results in the optimized pud move being
disabled.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/powerpc/platforms/Kconfig.cputype | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 3ce907523b1e..2e666e569fdf 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -97,6 +97,8 @@ config PPC_BOOK3S_64
select PPC_HAVE_PMU_SUPPORT
select SYS_SUPPORTS_HUGETLBFS
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ select HAVE_MOVE_PMD
+ select HAVE_MOVE_PUD
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
select ARCH_SUPPORTS_NUMA_BALANCING
select IRQ_WORK
--
2.31.1
next prev parent reply other threads:[~2021-05-24 9:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 9:01 [PATCH v6 00/11] Speedup mremap on ppc64 Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 01/11] selftest/mremap_test: Update the test to handle pagesize other than 4K Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 02/11] selftest/mremap_test: Avoid crash with static build Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 03/11] mm/mremap: Convert huge PUD move to separate helper Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 04/11] mm/mremap: Use pmd/pud_poplulate to update page table entries Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 05/11] powerpc/mm/book3s64: Fix possible build error Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 06/11] powerpc/mm/book3s64: Update tlb flush routines to take a page walk cache flush argument Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 07/11] mm/mremap: Use range flush that does TLB and page walk cache flush Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 17:02 ` Linus Torvalds
2021-05-24 17:02 ` Linus Torvalds
2021-05-25 13:27 ` Aneesh Kumar K.V
2021-05-25 13:27 ` Aneesh Kumar K.V
2021-05-25 17:08 ` Linus Torvalds
2021-05-25 17:08 ` Linus Torvalds
2021-05-24 9:01 ` [PATCH v6 08/11] mm/mremap: properly flush the TLB on mremap Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 09/11] mm/mremap: Fix race between mremap and pageout Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 13:38 ` [PATCH v6 updated 9/11] " Aneesh Kumar K.V
2021-05-24 13:38 ` Aneesh Kumar K.V
2021-05-24 9:01 ` [PATCH v6 10/11] mm/mremap: Allow arch runtime override Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V
2021-05-24 9:01 ` Aneesh Kumar K.V [this message]
2021-05-24 9:01 ` [PATCH v6 11/11] powerpc/mm: Enable HAVE_MOVE_PMD support Aneesh Kumar K.V
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