mm-damon-introduce-damon-based-lru-lists-sorting.patch removed from -mm tree

The quilt patch titled
Subject: mm/damon: introduce DAMON-based LRU-lists Sorting
has been removed from the -mm tree. Its filename was
mm-damon-introduce-damon-based-lru-lists-sorting.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: SeongJae Park <[email protected]>
Subject: mm/damon: introduce DAMON-based LRU-lists Sorting
Date: Mon, 13 Jun 2022 19:23:00 +0000

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.

---

 mm/damon/Kconfig    |    8 
 mm/damon/Makefile   |    1 
 mm/damon/lru_sort.c |  546 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 555 insertions(+)

@@ -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

@@ -6,3 +6,4 @@ obj-$(CONFIG_DAMON_PADDR)	+= ops-common.
 obj-$(CONFIG_DAMON_SYSFS)	+= sysfs.o
 obj-$(CONFIG_DAMON_DBGFS)	+= dbgfs.o
 obj-$(CONFIG_DAMON_RECLAIM)	+= reclaim.o
+obj-$(CONFIG_DAMON_LRU_SORT)	+= lru_sort.o

_

Patches currently in -mm which might be from [email protected] are

docs-admin-guide-damon-add-a-document-for-damon_lru_sort.patch