diff options
Diffstat (limited to 'target/linux/generic/pending-5.15/020-08-mm-multigenerational-lru-Kconfig.patch')
| -rw-r--r-- | target/linux/generic/pending-5.15/020-08-mm-multigenerational-lru-Kconfig.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.15/020-08-mm-multigenerational-lru-Kconfig.patch b/target/linux/generic/pending-5.15/020-08-mm-multigenerational-lru-Kconfig.patch new file mode 100644 index 0000000000..4462549f99 --- /dev/null +++ b/target/linux/generic/pending-5.15/020-08-mm-multigenerational-lru-Kconfig.patch @@ -0,0 +1,80 @@ +From 3008095eb835d207dd7e5b60899aad17f32aa9f7 Mon Sep 17 00:00:00 2001 +From: Yu Zhao <yuzhao@google.com> +Date: Mon, 25 Jan 2021 21:47:24 -0700 +Subject: [PATCH 09/10] mm: multigenerational lru: Kconfig + +Add configuration options for the multigenerational lru. + +Signed-off-by: Yu Zhao <yuzhao@google.com> +Tested-by: Konstantin Kharlamov <Hi-Angel@yandex.ru> +Change-Id: Ic74ea07f8fb5f56e6904a1b80c3c286bc2911635 +--- + mm/Kconfig | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 59 insertions(+) + +--- a/mm/Kconfig ++++ b/mm/Kconfig +@@ -899,4 +899,63 @@ config SECRETMEM + + source "mm/damon/Kconfig" + ++# the multigenerational lru { ++config LRU_GEN ++ bool "Multigenerational LRU" ++ depends on MMU ++ # the following options may leave not enough spare bits in page->flags ++ depends on !MAXSMP && (64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP) ++ help ++ A high performance LRU implementation to heavily overcommit workloads ++ that are not IO bound. See Documentation/vm/multigen_lru.rst for ++ details. ++ ++ Warning: do not enable this option unless you plan to use it because ++ it introduces a small per-process and per-memcg and per-node memory ++ overhead. ++ ++config LRU_GEN_ENABLED ++ bool "Turn on by default" ++ depends on LRU_GEN ++ help ++ The default value of /sys/kernel/mm/lru_gen/enabled is 0. This option ++ changes it to 1. ++ ++ Warning: the default value is the fast path. See ++ Documentation/static-keys.txt for details. ++ ++config LRU_GEN_STATS ++ bool "Full stats for debugging" ++ depends on LRU_GEN ++ help ++ This option keeps full stats for each generation, which can be read ++ from /sys/kernel/debug/lru_gen_full. ++ ++ Warning: do not enable this option unless you plan to use it because ++ it introduces an additional small per-process and per-memcg and ++ per-node memory overhead. ++ ++config NR_LRU_GENS ++ int "Max number of generations" ++ depends on LRU_GEN ++ range 4 31 ++ default 7 ++ help ++ This will use order_base_2(N+1) spare bits from page flags. ++ ++ Warning: do not use numbers larger than necessary because each ++ generation introduces a small per-node and per-memcg memory overhead. ++ ++config TIERS_PER_GEN ++ int "Number of tiers per generation" ++ depends on LRU_GEN ++ range 2 5 ++ default 4 ++ help ++ This will use N-2 spare bits from page flags. ++ ++ Larger values generally offer better protection to active pages under ++ heavy buffered I/O workloads. ++# } ++ + endmenu |