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| author | SeongJae Park <sj@kernel.org> | 2022-06-13 21:23:00 +0200 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-04 03:08:43 +0200 |
| commit | 40e983cca9274e177bd5b9379299b44d9536ac68 (patch) | |
| tree | 4b19d4d01255ce56c603b55799e0b6914d8491f7 /mm/damon/Kconfig | |
| parent | Docs/admin-guide/damon/sysfs: document 'LRU_DEPRIO' scheme action (diff) | |
| download | linux-40e983cca9274e177bd5b9379299b44d9536ac68.tar.xz linux-40e983cca9274e177bd5b9379299b44d9536ac68.zip | |
mm/damon: introduce DAMON-based LRU-lists Sorting
Users can do data access-aware LRU-lists sorting using 'LRU_PRIO' and
'LRU_DEPRIO' DAMOS actions. However, finding best parameters including
the hotness/coldness thresholds, CPU quota, and watermarks could be
challenging for some users. To make the scheme easy to be used without
complex tuning for common situations, this commit implements a static
kernel module called 'DAMON_LRU_SORT' using the 'LRU_PRIO' and
'LRU_DEPRIO' DAMOS actions.
It proactively sorts LRU-lists using DAMON with conservatively chosen
default values of the parameters. That is, the module under its default
parameters will make no harm for common situations but provide some level
of efficiency improvements for systems having clear hot/cold access
pattern under a level of memory pressure while consuming only a limited
small portion of CPU time.
Link: https://lkml.kernel.org/r/20220613192301.8817-9-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon/Kconfig')
| -rw-r--r-- | mm/damon/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/damon/Kconfig b/mm/damon/Kconfig index 9b559c76d6dd..66265e3a9c65 100644 --- a/mm/damon/Kconfig +++ b/mm/damon/Kconfig @@ -92,4 +92,12 @@ config DAMON_RECLAIM reclamation under light memory pressure, while the traditional page scanning-based reclamation is used for heavy pressure. +config DAMON_LRU_SORT + bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)" + depends on DAMON_PADDR + help + This builds the DAMON-based LRU-lists sorting subsystem. It tries to + protect frequently accessed (hot) pages while rarely accessed (cold) + pages reclaimed first under memory pressure. + endmenu |