From: Yu Zhao <yuzhao@google.com> To: Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org> Cc: Andi Kleen <ak@linux.intel.com>, Catalin Marinas <catalin.marinas@arm.com>, Dave Hansen <dave.hansen@linux.intel.com>, Hillf Danton <hdanton@sina.com>, Jens Axboe <axboe@kernel.dk>, Jesse Barnes <jsbarnes@google.com>, Johannes Weiner <hannes@cmpxchg.org>, Jonathan Corbet <corbet@lwn.net>, Matthew Wilcox <willy@infradead.org>, Mel Gorman <mgorman@suse.de>, Michael Larabel <Michael@michaellarabel.com>, Michal Hocko <mhocko@kernel.org>, Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>, Will Deacon <will@kernel.org>, Ying Huang <ying.huang@intel.com>, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, page-reclaim@google.com, x86@kernel.org, Yu Zhao <yuzhao@google.com>, Konstantin Kharlamov <Hi-Angel@yandex.ru> Subject: [PATCH v6 9/9] mm: multigenerational lru: Kconfig Date: Tue, 4 Jan 2022 13:22:28 -0700 [thread overview] Message-ID: <20220104202227.2903605-10-yuzhao@google.com> (raw) In-Reply-To: <20220104202227.2903605-1-yuzhao@google.com> Add configuration options for the multigenerational lru. Signed-off-by: Yu Zhao <yuzhao@google.com> Tested-by: Konstantin Kharlamov <Hi-Angel@yandex.ru> --- Documentation/vm/multigen_lru.rst | 18 ++++++++++++ mm/Kconfig | 48 +++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) diff --git a/Documentation/vm/multigen_lru.rst b/Documentation/vm/multigen_lru.rst index 6f9e0181348b..a54c5637c455 100644 --- a/Documentation/vm/multigen_lru.rst +++ b/Documentation/vm/multigen_lru.rst @@ -6,6 +6,13 @@ Multigenerational LRU Quick start =========== +Build configurations +-------------------- +:Required: Set ``CONFIG_LRU_GEN=y``. + +:Optional: Set ``CONFIG_LRU_GEN_ENABLED=y`` to enable this feature by + default. + Runtime configurations ---------------------- :Required: Write ``1`` to ``/sys/kernel/mm/lru_gen/enable`` if the @@ -25,6 +32,17 @@ Personal computers Data centers ------------ +:Optional: Change ``CONFIG_NR_LRU_GENS`` to a larger value to support + more generations for ``Working set estimation`` and + ``Proactive reclaim``. + +:Optional: Change ``CONFIG_TIERS_PER_GEN`` to a larger value to + support more tiers, which generally provide better protection for + page cache when under heavy buffered I/O workloads. + +:Optional: Set ``CONFIG_LRU_GEN_STATS=y`` to enable full stats for + debugging. See ``Debugfs interface``. + :Debugfs interface: ``/sys/kernel/debug/lru_gen`` has the following format: :: diff --git a/mm/Kconfig b/mm/Kconfig index 356f4f2c779e..8a33605917f5 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -900,6 +900,54 @@ config IO_MAPPING config SECRETMEM def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED +# multigenerational lru { +config LRU_GEN + bool "Multigenerational LRU" + depends on MMU + # the following options can use up the spare bits in page flags + depends on !MAXSMP && (64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP) + help + A high performance LRU implementation for memory overcommit. See + Documentation/vm/multigen_lru.rst for details. + +config LRU_GEN_ENABLED + bool "Enable by default" + depends on LRU_GEN + help + This option enables the multigenerational lru by default. + +config NR_LRU_GENS + int "Max number of generations" + depends on LRU_GEN + range 4 31 + default 4 + help + This option uses order_base_2(N+1) bits in page flags. + + Do not configure more generations than you plan to use. They have a + per-memcg and per-node memory overhead. + +config TIERS_PER_GEN + int "Number of tiers per generation" + depends on LRU_GEN + range 2 5 + default 4 + help + This option uses N-2 bits in page flags. + + Larger values generally provide better protection for page cache when + under heavy buffered I/O workloads. + +config LRU_GEN_STATS + bool "Full stats for debugging" + depends on LRU_GEN + help + This option keeps historical stats for evicted generations. + + Do not enable full stats unless you plan to look at them. They have a + per-memcg and per-node memory overhead. +# } + source "mm/damon/Kconfig" endmenu -- 2.34.1.448.ga2b2bfdf31-goog
WARNING: multiple messages have this Message-ID (diff)
From: Yu Zhao <yuzhao@google.com> To: Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org> Cc: Andi Kleen <ak@linux.intel.com>, Catalin Marinas <catalin.marinas@arm.com>, Dave Hansen <dave.hansen@linux.intel.com>, Hillf Danton <hdanton@sina.com>, Jens Axboe <axboe@kernel.dk>, Jesse Barnes <jsbarnes@google.com>, Johannes Weiner <hannes@cmpxchg.org>, Jonathan Corbet <corbet@lwn.net>, Matthew Wilcox <willy@infradead.org>, Mel Gorman <mgorman@suse.de>, Michael Larabel <Michael@michaellarabel.com>, Michal Hocko <mhocko@kernel.org>, Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>, Will Deacon <will@kernel.org>, Ying Huang <ying.huang@intel.com>, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, page-reclaim@google.com, x86@kernel.org, Yu Zhao <yuzhao@google.com>, Konstantin Kharlamov <Hi-Angel@yandex.ru> Subject: [PATCH v6 9/9] mm: multigenerational lru: Kconfig Date: Tue, 4 Jan 2022 13:22:28 -0700 [thread overview] Message-ID: <20220104202227.2903605-10-yuzhao@google.com> (raw) In-Reply-To: <20220104202227.2903605-1-yuzhao@google.com> Add configuration options for the multigenerational lru. Signed-off-by: Yu Zhao <yuzhao@google.com> Tested-by: Konstantin Kharlamov <Hi-Angel@yandex.ru> --- Documentation/vm/multigen_lru.rst | 18 ++++++++++++ mm/Kconfig | 48 +++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) diff --git a/Documentation/vm/multigen_lru.rst b/Documentation/vm/multigen_lru.rst index 6f9e0181348b..a54c5637c455 100644 --- a/Documentation/vm/multigen_lru.rst +++ b/Documentation/vm/multigen_lru.rst @@ -6,6 +6,13 @@ Multigenerational LRU Quick start =========== +Build configurations +-------------------- +:Required: Set ``CONFIG_LRU_GEN=y``. + +:Optional: Set ``CONFIG_LRU_GEN_ENABLED=y`` to enable this feature by + default. + Runtime configurations ---------------------- :Required: Write ``1`` to ``/sys/kernel/mm/lru_gen/enable`` if the @@ -25,6 +32,17 @@ Personal computers Data centers ------------ +:Optional: Change ``CONFIG_NR_LRU_GENS`` to a larger value to support + more generations for ``Working set estimation`` and + ``Proactive reclaim``. + +:Optional: Change ``CONFIG_TIERS_PER_GEN`` to a larger value to + support more tiers, which generally provide better protection for + page cache when under heavy buffered I/O workloads. + +:Optional: Set ``CONFIG_LRU_GEN_STATS=y`` to enable full stats for + debugging. See ``Debugfs interface``. + :Debugfs interface: ``/sys/kernel/debug/lru_gen`` has the following format: :: diff --git a/mm/Kconfig b/mm/Kconfig index 356f4f2c779e..8a33605917f5 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -900,6 +900,54 @@ config IO_MAPPING config SECRETMEM def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED +# multigenerational lru { +config LRU_GEN + bool "Multigenerational LRU" + depends on MMU + # the following options can use up the spare bits in page flags + depends on !MAXSMP && (64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP) + help + A high performance LRU implementation for memory overcommit. See + Documentation/vm/multigen_lru.rst for details. + +config LRU_GEN_ENABLED + bool "Enable by default" + depends on LRU_GEN + help + This option enables the multigenerational lru by default. + +config NR_LRU_GENS + int "Max number of generations" + depends on LRU_GEN + range 4 31 + default 4 + help + This option uses order_base_2(N+1) bits in page flags. + + Do not configure more generations than you plan to use. They have a + per-memcg and per-node memory overhead. + +config TIERS_PER_GEN + int "Number of tiers per generation" + depends on LRU_GEN + range 2 5 + default 4 + help + This option uses N-2 bits in page flags. + + Larger values generally provide better protection for page cache when + under heavy buffered I/O workloads. + +config LRU_GEN_STATS + bool "Full stats for debugging" + depends on LRU_GEN + help + This option keeps historical stats for evicted generations. + + Do not enable full stats unless you plan to look at them. They have a + per-memcg and per-node memory overhead. +# } + source "mm/damon/Kconfig" endmenu -- 2.34.1.448.ga2b2bfdf31-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-01-04 20:24 UTC|newest] Thread overview: 223+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-04 20:22 [PATCH v6 0/9] Multigenerational LRU Framework Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 1/9] mm: x86, arm64: add arch_has_hw_pte_young() Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-05 10:45 ` Will Deacon 2022-01-05 10:45 ` Will Deacon 2022-01-05 20:47 ` Yu Zhao 2022-01-05 20:47 ` Yu Zhao 2022-01-06 10:30 ` Will Deacon 2022-01-06 10:30 ` Will Deacon 2022-01-07 7:25 ` Yu Zhao 2022-01-07 7:25 ` Yu Zhao 2022-01-11 14:19 ` Will Deacon 2022-01-11 14:19 ` Will Deacon 2022-01-11 22:27 ` Yu Zhao 2022-01-11 22:27 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 2/9] mm: x86: add CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-04 21:24 ` Linus Torvalds 2022-01-04 21:24 ` Linus Torvalds 2022-01-04 20:22 ` [PATCH v6 3/9] mm/vmscan.c: refactor shrink_node() Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 4/9] mm: multigenerational lru: groundwork Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-04 21:34 ` Linus Torvalds 2022-01-04 21:34 ` Linus Torvalds 2022-01-11 8:16 ` Aneesh Kumar K.V 2022-01-11 8:16 ` Aneesh Kumar K.V 2022-01-12 2:16 ` Yu Zhao 2022-01-12 2:16 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 5/9] mm: multigenerational lru: mm_struct list Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-07 9:06 ` Michal Hocko 2022-01-07 9:06 ` Michal Hocko 2022-01-08 0:19 ` Yu Zhao 2022-01-08 0:19 ` Yu Zhao 2022-01-10 15:21 ` Michal Hocko 2022-01-10 15:21 ` Michal Hocko 2022-01-12 8:08 ` Yu Zhao 2022-01-12 8:08 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 6/9] mm: multigenerational lru: aging Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-06 16:06 ` Michal Hocko 2022-01-06 16:06 ` Michal Hocko 2022-01-06 21:27 ` Yu Zhao 2022-01-06 21:27 ` Yu Zhao 2022-01-07 8:43 ` Michal Hocko 2022-01-07 8:43 ` Michal Hocko 2022-01-07 21:12 ` Yu Zhao 2022-01-07 21:12 ` Yu Zhao 2022-01-06 16:12 ` Michal Hocko 2022-01-06 16:12 ` Michal Hocko 2022-01-06 21:41 ` Yu Zhao 2022-01-06 21:41 ` Yu Zhao 2022-01-07 8:55 ` Michal Hocko 2022-01-07 8:55 ` Michal Hocko 2022-01-07 9:00 ` Michal Hocko 2022-01-07 9:00 ` Michal Hocko 2022-01-10 3:58 ` Yu Zhao 2022-01-10 3:58 ` Yu Zhao 2022-01-10 14:37 ` Michal Hocko 2022-01-10 14:37 ` Michal Hocko 2022-01-13 9:43 ` Yu Zhao 2022-01-13 9:43 ` Yu Zhao 2022-01-13 12:02 ` Michal Hocko 2022-01-13 12:02 ` Michal Hocko 2022-01-19 6:31 ` Yu Zhao 2022-01-19 6:31 ` Yu Zhao 2022-01-19 9:44 ` Michal Hocko 2022-01-19 9:44 ` Michal Hocko 2022-01-10 15:01 ` Michal Hocko 2022-01-10 15:01 ` Michal Hocko 2022-01-10 16:01 ` Vlastimil Babka 2022-01-10 16:01 ` Vlastimil Babka 2022-01-10 16:25 ` Michal Hocko 2022-01-10 16:25 ` Michal Hocko 2022-01-11 23:16 ` Yu Zhao 2022-01-11 23:16 ` Yu Zhao 2022-01-12 10:28 ` Michal Hocko 2022-01-12 10:28 ` Michal Hocko 2022-01-13 9:25 ` Yu Zhao 2022-01-13 9:25 ` Yu Zhao 2022-01-07 13:11 ` Michal Hocko 2022-01-07 13:11 ` Michal Hocko 2022-01-07 23:36 ` Yu Zhao 2022-01-07 23:36 ` Yu Zhao 2022-01-10 15:35 ` Michal Hocko 2022-01-10 15:35 ` Michal Hocko 2022-01-11 1:18 ` Yu Zhao 2022-01-11 1:18 ` Yu Zhao 2022-01-11 9:00 ` Michal Hocko 2022-01-11 9:00 ` Michal Hocko [not found] ` <1641900108.61dd684cb0e59@mail.inbox.lv> 2022-01-11 12:15 ` Michal Hocko 2022-01-11 12:15 ` Michal Hocko 2022-01-13 17:00 ` Alexey Avramov 2022-01-13 17:00 ` Alexey Avramov 2022-01-11 14:22 ` Alexey Avramov 2022-01-11 14:22 ` Alexey Avramov 2022-01-07 14:44 ` Michal Hocko 2022-01-07 14:44 ` Michal Hocko 2022-01-10 4:47 ` Yu Zhao 2022-01-10 4:47 ` Yu Zhao 2022-01-10 10:54 ` Michal Hocko 2022-01-10 10:54 ` Michal Hocko 2022-01-19 7:04 ` Yu Zhao 2022-01-19 7:04 ` Yu Zhao 2022-01-19 9:42 ` Michal Hocko 2022-01-19 9:42 ` Michal Hocko 2022-01-23 21:28 ` Yu Zhao 2022-01-23 21:28 ` Yu Zhao 2022-01-24 14:01 ` Michal Hocko 2022-01-24 14:01 ` Michal Hocko 2022-01-10 16:57 ` Michal Hocko 2022-01-10 16:57 ` Michal Hocko 2022-01-12 1:01 ` Yu Zhao 2022-01-12 1:01 ` Yu Zhao 2022-01-12 10:17 ` Michal Hocko 2022-01-12 10:17 ` Michal Hocko 2022-01-12 23:43 ` Yu Zhao 2022-01-12 23:43 ` Yu Zhao 2022-01-13 11:57 ` Michal Hocko 2022-01-13 11:57 ` Michal Hocko 2022-01-23 21:40 ` Yu Zhao 2022-01-23 21:40 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 7/9] mm: multigenerational lru: eviction Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-11 10:37 ` Aneesh Kumar K.V 2022-01-11 10:37 ` Aneesh Kumar K.V 2022-01-12 8:05 ` Yu Zhao 2022-01-12 8:05 ` Yu Zhao 2022-01-04 20:22 ` [PATCH v6 8/9] mm: multigenerational lru: user interface Yu Zhao 2022-01-04 20:22 ` Yu Zhao 2022-01-10 10:27 ` Mike Rapoport 2022-01-10 10:27 ` Mike Rapoport 2022-01-12 8:35 ` Yu Zhao 2022-01-12 8:35 ` Yu Zhao 2022-01-12 10:31 ` Michal Hocko 2022-01-12 10:31 ` Michal Hocko 2022-01-12 15:45 ` Mike Rapoport 2022-01-12 15:45 ` Mike Rapoport 2022-01-13 9:47 ` Yu Zhao 2022-01-13 9:47 ` Yu Zhao 2022-01-13 10:31 ` Aneesh Kumar K.V 2022-01-13 10:31 ` Aneesh Kumar K.V 2022-01-13 23:02 ` Yu Zhao 2022-01-13 23:02 ` Yu Zhao 2022-01-14 5:20 ` Aneesh Kumar K.V 2022-01-14 5:20 ` Aneesh Kumar K.V 2022-01-14 6:50 ` Yu Zhao 2022-01-14 6:50 ` Yu Zhao 2022-01-04 20:22 ` Yu Zhao [this message] 2022-01-04 20:22 ` [PATCH v6 9/9] mm: multigenerational lru: Kconfig Yu Zhao 2022-01-04 21:39 ` Linus Torvalds 2022-01-04 21:39 ` Linus Torvalds 2022-01-04 20:22 ` [PATCH v6 0/9] Multigenerational LRU Framework Yu Zhao 2022-01-04 20:30 ` Yu Zhao 2022-01-04 20:30 ` Yu Zhao 2022-01-04 21:43 ` Linus Torvalds 2022-01-04 21:43 ` Linus Torvalds 2022-01-05 21:12 ` Yu Zhao 2022-01-05 21:12 ` Yu Zhao 2022-01-07 9:38 ` Michal Hocko 2022-01-07 9:38 ` Michal Hocko 2022-01-07 18:45 ` Yu Zhao 2022-01-07 18:45 ` Yu Zhao 2022-01-10 15:39 ` Michal Hocko 2022-01-10 15:39 ` Michal Hocko 2022-01-10 22:04 ` Yu Zhao 2022-01-10 22:04 ` Yu Zhao 2022-01-10 22:46 ` Jesse Barnes 2022-01-10 22:46 ` Jesse Barnes 2022-01-11 1:41 ` Linus Torvalds 2022-01-11 1:41 ` Linus Torvalds 2022-01-11 10:40 ` Michal Hocko 2022-01-11 10:40 ` Michal Hocko 2022-01-11 8:41 ` Yu Zhao 2022-01-11 8:41 ` Yu Zhao 2022-01-11 8:53 ` Holger Hoffstätte 2022-01-11 8:53 ` Holger Hoffstätte 2022-01-11 9:26 ` Jan Alexander Steffens (heftig) 2022-01-11 16:04 ` Shuang Zhai 2022-01-11 16:04 ` Shuang Zhai 2022-01-12 1:46 ` Suleiman Souhlal 2022-01-12 1:46 ` Suleiman Souhlal 2022-01-12 6:07 ` Sofia Trinh 2022-01-12 6:07 ` Sofia Trinh 2022-01-12 16:17 ` Daniel Byrne 2022-01-18 9:21 ` Yu Zhao 2022-01-18 9:21 ` Yu Zhao 2022-01-18 9:36 ` Donald Carr 2022-01-18 9:36 ` Donald Carr 2022-01-19 20:19 ` Steven Barrett 2022-01-19 20:19 ` Steven Barrett 2022-01-19 22:25 ` Brian Geffon 2022-01-19 22:25 ` Brian Geffon 2022-01-05 2:44 ` Shuang Zhai 2022-01-05 2:44 ` Shuang Zhai 2022-01-05 8:55 ` SeongJae Park 2022-01-05 8:55 ` SeongJae Park 2022-01-05 10:53 ` Yu Zhao 2022-01-05 10:53 ` Yu Zhao 2022-01-05 11:12 ` Borislav Petkov 2022-01-05 11:12 ` Borislav Petkov 2022-01-05 11:25 ` SeongJae Park 2022-01-05 11:25 ` SeongJae Park 2022-01-05 21:06 ` Yu Zhao 2022-01-05 21:06 ` Yu Zhao 2022-01-10 14:49 ` Alexey Avramov 2022-01-10 14:49 ` Alexey Avramov 2022-01-11 10:24 ` Alexey Avramov 2022-01-11 10:24 ` Alexey Avramov 2022-01-12 20:56 ` Oleksandr Natalenko 2022-01-12 20:56 ` Oleksandr Natalenko 2022-01-13 8:59 ` Yu Zhao 2022-01-13 8:59 ` Yu Zhao 2022-01-23 5:43 ` Barry Song 2022-01-23 5:43 ` Barry Song 2022-01-25 6:48 ` Yu Zhao 2022-01-25 6:48 ` Yu Zhao 2022-01-28 8:54 ` Barry Song 2022-01-28 8:54 ` Barry Song 2022-02-08 9:16 ` Yu Zhao 2022-02-08 9:16 ` Yu Zhao
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