138 lines
6.1 KiB
Diff
138 lines
6.1 KiB
Diff
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er9mr1749542qvb.5.1615622293640; Fri, 12 Mar 2021 23:58:13 -0800 (PST)
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Date: Sat, 13 Mar 2021 00:57:46 -0700
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In-Reply-To: <20210313075747.3781593-1-yuzhao@google.com>
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References: <20210313075747.3781593-1-yuzhao@google.com>
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Subject: [PATCH v1 13/14] mm: multigenerational lru: Kconfig
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From: Yu Zhao <yuzhao@google.com>
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To: linux-mm@kvack.org
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Cc: Alex Shi <alex.shi@linux.alibaba.com>,
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Andrew Morton <akpm@linux-foundation.org>,
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Dave Hansen <dave.hansen@linux.intel.com>,
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Hillf Danton <hdanton@sina.com>,
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Johannes Weiner <hannes@cmpxchg.org>,
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Joonsoo Kim <iamjoonsoo.kim@lge.com>,
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Matthew Wilcox <willy@infradead.org>,
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Mel Gorman <mgorman@suse.de>, Michal Hocko <mhocko@suse.com>,
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Roman Gushchin <guro@fb.com>, Vlastimil Babka <vbabka@suse.cz>,
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Wei Yang <richard.weiyang@linux.alibaba.com>,
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Yang Shi <shy828301@gmail.com>,
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Ying Huang <ying.huang@intel.com>,
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linux-kernel@vger.kernel.org, page-reclaim@google.com,
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Yu Zhao <yuzhao@google.com>
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Precedence: bulk
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Archived-At: <https://lore.kernel.org/lkml/20210313075747.3781593-14-yuzhao@google.com/>
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List-Post: <mailto:linux-kernel@vger.kernel.org>
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Add configuration options for multigenerational lru.
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Signed-off-by: Yu Zhao <yuzhao@google.com>
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---
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mm/Kconfig | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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diff --git a/mm/Kconfig b/mm/Kconfig
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index 24c045b24b95..3a5bcc2d7a45 100644
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--- a/mm/Kconfig
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+++ b/mm/Kconfig
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@@ -872,4 +872,33 @@ config MAPPING_DIRTY_HELPERS
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config KMAP_LOCAL
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bool
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+config LRU_GEN
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+ bool "Multigenerational LRU"
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+ depends on MMU
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+ help
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+ High performance multigenerational LRU to heavily overcommit workloads
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+ that are not IO bound. See Documentation/vm/multigen_lru.rst for
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+ details.
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+
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+ Warning: do not enable this option unless you plan to use it because
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+ it introduces a small per-process memory overhead.
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+
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+config NR_LRU_GENS
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+ int "Max number of generations"
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+ depends on LRU_GEN
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+ range 4 63
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+ default 7
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+ help
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+ This will use ilog2(N)+1 spare bits from page flags.
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+
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+ Warning: do not use numbers larger than necessary because each
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+ generation introduces a small per-node and per-memcg memory overhead.
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+
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+config LRU_GEN_ENABLED
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+ bool "Turn on by default"
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+ depends on LRU_GEN
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+ help
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+ The default value of /sys/kernel/mm/lru_gen/enabled is 0. This option
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+ changes it to 1.
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+
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endmenu
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--
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2.31.0.rc2.261.g7f71774620-goog
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