From: Miles Chen <miles.chen@mediatek.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Russell King <linux@armlinux.org.uk>,
Minchan Kim <minchan@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>, <wsd_upstream@mediatek.com>
Subject: [PATCH v2 0/4] arm: support get_user_pages_fast
Date: Fri, 23 Oct 2020 17:14:33 +0800 [thread overview]
Message-ID: <20201023091437.8225-1-miles.chen@mediatek.com> (raw)
get_user_pages_fast helps app's launching time because it could reduce
mmap_sem lock contentions when app is launching.
Minchan posted a RFC patch and patch v1 [1] in 2018 and currently he has no
bandwidth to rework this patch, so I rebase Minchan's patch
(arm: support get_user_pages_fast) and modify the patch according
to Catalin's comment and re-post this patch.
First, to use generic get_user_pages_fast code, use strict mm type in
pgtable-2level-types.
2nd patch: reorder memory type table to use 5th bit of the page table
3rd patch: introduces L_PTE_SPECIAL for arm so that last patch can
support get_user_pags_fast.
4th patch: remove L_PTE_MT_VECTORS and use read-only type.
[1] https://lore.kernel.org/patchwork/cover/986573/
Change since v1:
* modify comment
* remove L_PTE_MT_VECTORS and use read-only type
Change since RFC:
* Remove CPU_v7M - Catalin
* define DEV_NONSHARED to SHARED - Catalin
* https://lkml.kernel.org/r/20180910165011.zcighyuabshsmxjb@armageddon.cambridge.arm.com
Miles Chen (2):
arm: mm: use strict p[gum]d types
arm: replace vector mem type with read-only type
Minchan Kim (2):
arm: mm: reordering memory type table
arm: mm: introduce L_PTE_SPECIAL
arch/arm/Kconfig | 4 ++--
arch/arm/include/asm/fixmap.h | 6 ++---
arch/arm/include/asm/pgtable-2level-types.h | 26 ---------------------
arch/arm/include/asm/pgtable-2level.h | 22 +++++++++++++----
arch/arm/include/asm/pgtable-3level.h | 6 -----
arch/arm/include/asm/pgtable.h | 13 +++++++++++
arch/arm/mm/mmu.c | 7 +++---
arch/arm/mm/proc-macros.S | 2 +-
8 files changed, 40 insertions(+), 46 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: Miles Chen <miles.chen@mediatek.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Russell King <linux@armlinux.org.uk>,
Minchan Kim <minchan@kernel.org>
Cc: linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, wsd_upstream@mediatek.com
Subject: [PATCH v2 0/4] arm: support get_user_pages_fast
Date: Fri, 23 Oct 2020 17:14:33 +0800 [thread overview]
Message-ID: <20201023091437.8225-1-miles.chen@mediatek.com> (raw)
get_user_pages_fast helps app's launching time because it could reduce
mmap_sem lock contentions when app is launching.
Minchan posted a RFC patch and patch v1 [1] in 2018 and currently he has no
bandwidth to rework this patch, so I rebase Minchan's patch
(arm: support get_user_pages_fast) and modify the patch according
to Catalin's comment and re-post this patch.
First, to use generic get_user_pages_fast code, use strict mm type in
pgtable-2level-types.
2nd patch: reorder memory type table to use 5th bit of the page table
3rd patch: introduces L_PTE_SPECIAL for arm so that last patch can
support get_user_pags_fast.
4th patch: remove L_PTE_MT_VECTORS and use read-only type.
[1] https://lore.kernel.org/patchwork/cover/986573/
Change since v1:
* modify comment
* remove L_PTE_MT_VECTORS and use read-only type
Change since RFC:
* Remove CPU_v7M - Catalin
* define DEV_NONSHARED to SHARED - Catalin
* https://lkml.kernel.org/r/20180910165011.zcighyuabshsmxjb@armageddon.cambridge.arm.com
Miles Chen (2):
arm: mm: use strict p[gum]d types
arm: replace vector mem type with read-only type
Minchan Kim (2):
arm: mm: reordering memory type table
arm: mm: introduce L_PTE_SPECIAL
arch/arm/Kconfig | 4 ++--
arch/arm/include/asm/fixmap.h | 6 ++---
arch/arm/include/asm/pgtable-2level-types.h | 26 ---------------------
arch/arm/include/asm/pgtable-2level.h | 22 +++++++++++++----
arch/arm/include/asm/pgtable-3level.h | 6 -----
arch/arm/include/asm/pgtable.h | 13 +++++++++++
arch/arm/mm/mmu.c | 7 +++---
arch/arm/mm/proc-macros.S | 2 +-
8 files changed, 40 insertions(+), 46 deletions(-)
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Miles Chen <miles.chen@mediatek.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Russell King <linux@armlinux.org.uk>,
Minchan Kim <minchan@kernel.org>
Cc: linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, wsd_upstream@mediatek.com
Subject: [PATCH v2 0/4] arm: support get_user_pages_fast
Date: Fri, 23 Oct 2020 17:14:33 +0800 [thread overview]
Message-ID: <20201023091437.8225-1-miles.chen@mediatek.com> (raw)
get_user_pages_fast helps app's launching time because it could reduce
mmap_sem lock contentions when app is launching.
Minchan posted a RFC patch and patch v1 [1] in 2018 and currently he has no
bandwidth to rework this patch, so I rebase Minchan's patch
(arm: support get_user_pages_fast) and modify the patch according
to Catalin's comment and re-post this patch.
First, to use generic get_user_pages_fast code, use strict mm type in
pgtable-2level-types.
2nd patch: reorder memory type table to use 5th bit of the page table
3rd patch: introduces L_PTE_SPECIAL for arm so that last patch can
support get_user_pags_fast.
4th patch: remove L_PTE_MT_VECTORS and use read-only type.
[1] https://lore.kernel.org/patchwork/cover/986573/
Change since v1:
* modify comment
* remove L_PTE_MT_VECTORS and use read-only type
Change since RFC:
* Remove CPU_v7M - Catalin
* define DEV_NONSHARED to SHARED - Catalin
* https://lkml.kernel.org/r/20180910165011.zcighyuabshsmxjb@armageddon.cambridge.arm.com
Miles Chen (2):
arm: mm: use strict p[gum]d types
arm: replace vector mem type with read-only type
Minchan Kim (2):
arm: mm: reordering memory type table
arm: mm: introduce L_PTE_SPECIAL
arch/arm/Kconfig | 4 ++--
arch/arm/include/asm/fixmap.h | 6 ++---
arch/arm/include/asm/pgtable-2level-types.h | 26 ---------------------
arch/arm/include/asm/pgtable-2level.h | 22 +++++++++++++----
arch/arm/include/asm/pgtable-3level.h | 6 -----
arch/arm/include/asm/pgtable.h | 13 +++++++++++
arch/arm/mm/mmu.c | 7 +++---
arch/arm/mm/proc-macros.S | 2 +-
8 files changed, 40 insertions(+), 46 deletions(-)
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-10-23 9:15 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-23 9:14 Miles Chen [this message]
2020-10-23 9:14 ` [PATCH v2 0/4] arm: support get_user_pages_fast Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` [PATCH v2 1/4] arm: mm: use strict p[gum]d types Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` [PATCH v2 2/4] arm: mm: reordering memory type table Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 10:16 ` Russell King - ARM Linux admin
2020-10-23 10:16 ` Russell King - ARM Linux admin
2020-10-23 10:16 ` Russell King - ARM Linux admin
2020-10-27 8:03 ` Miles Chen
2020-10-27 8:03 ` Miles Chen
2020-10-27 8:03 ` Miles Chen
2020-10-23 9:14 ` [PATCH v2 3/4] arm: mm: introduce L_PTE_SPECIAL Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 10:08 ` Russell King - ARM Linux admin
2020-10-23 10:08 ` Russell King - ARM Linux admin
2020-10-23 10:08 ` Russell King - ARM Linux admin
2020-10-27 7:45 ` Miles Chen
2020-10-27 7:45 ` Miles Chen
2020-10-27 7:45 ` Miles Chen
2020-10-27 9:11 ` Russell King - ARM Linux admin
2020-10-27 9:11 ` Russell King - ARM Linux admin
2020-10-27 9:11 ` Russell King - ARM Linux admin
2020-11-01 12:48 ` Miles Chen
2020-11-01 12:48 ` Miles Chen
2020-11-01 12:48 ` Miles Chen
2020-10-23 9:14 ` [PATCH v2 4/4] arm: replace vector mem type with read-only type Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 9:14 ` Miles Chen
2020-10-23 10:12 ` Russell King - ARM Linux admin
2020-10-23 10:12 ` Russell King - ARM Linux admin
2020-10-23 10:12 ` Russell King - ARM Linux admin
2020-10-27 7:41 ` Miles Chen
2020-10-27 7:41 ` Miles Chen
2020-10-27 7:41 ` Miles Chen
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