+ mm-damon-paddr-implement-damon_folio_mkold.patch added to mm-unstable branch

+ mm-damon-paddr-implement-damon_folio_mkold.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/paddr: implement damon_folio_mkold()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-damon-paddr-implement-damon_folio_mkold.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-paddr-implement-damon_folio_mkold.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/paddr: implement damon_folio_mkold()
Date: Fri, 26 Apr 2024 12:52:41 -0700

damon_pa_mkold() receives physical address, get the folio covering the
address, and makes the folio as old.  A following commit will reuse the
internal logic for marking a given folio as old.  To avoid duplication of
the code, split the internal logic.  Also, change the rmap walker
function's name from __damon_pa_mkold() to damon_folio_mkold_one(),
following the change of the caller's name and the naming rule that more
commonly used by other rmap walkers.

Link: https://lkml.kernel.org/r/20240426195247.100306-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: Honggyu Kim <honggyu.kim@sk.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/paddr.c |   27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

--- a/mm/damon/paddr.c~mm-damon-paddr-implement-damon_folio_mkold
+++ a/mm/damon/paddr.c
@@ -16,8 +16,8 @@
 #include "../internal.h"
 #include "ops-common.h"
 
-static bool __damon_pa_mkold(struct folio *folio, struct vm_area_struct *vma,
-		unsigned long addr, void *arg)
+static bool damon_folio_mkold_one(struct folio *folio,
+		struct vm_area_struct *vma, unsigned long addr, void *arg)
 {
 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, addr, 0);
 
@@ -31,33 +31,38 @@ static bool __damon_pa_mkold(struct foli
 	return true;
 }
 
-static void damon_pa_mkold(unsigned long paddr)
+static void damon_folio_mkold(struct folio *folio)
 {
-	struct folio *folio = damon_get_folio(PHYS_PFN(paddr));
 	struct rmap_walk_control rwc = {
-		.rmap_one = __damon_pa_mkold,
+		.rmap_one = damon_folio_mkold_one,
 		.anon_lock = folio_lock_anon_vma_read,
 	};
 	bool need_lock;
 
-	if (!folio)
-		return;
-
 	if (!folio_mapped(folio) || !folio_raw_mapping(folio)) {
 		folio_set_idle(folio);
-		goto out;
+		return;
 	}
 
 	need_lock = !folio_test_anon(folio) || folio_test_ksm(folio);
 	if (need_lock && !folio_trylock(folio))
-		goto out;
+		return;
 
 	rmap_walk(folio, &rwc);
 
 	if (need_lock)
 		folio_unlock(folio);
 
-out:
+}
+
+static void damon_pa_mkold(unsigned long paddr)
+{
+	struct folio *folio = damon_get_folio(PHYS_PFN(paddr));
+
+	if (!folio)
+		return;
+
+	damon_folio_mkold(folio);
 	folio_put(folio);
 }
 
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-paddr-implement-damon_folio_young.patch
mm-damon-paddr-implement-damon_folio_mkold.patch
mm-damon-add-damos-filter-type-young.patch
mm-damon-paddr-implement-damos-filter-type-young.patch
docs-mm-damon-design-document-young-page-type-damos-filter.patch
docs-admin-guide-mm-damon-usage-update-for-young-page-type-damos-filter.patch
docs-abi-damon-update-for-youg-page-type-damos-filter.patch