[PATCH 2/7] mm/damon/paddr: implement damon_folio_mkold()

SeongJae Park
2024-04-26T19:53:01Z

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.

Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: Honggyu Kim <honggyu.kim@sk.com>
---
mm/damon/paddr.c | 27 ++++++++++++++++-----------
1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 25c3ba2a9eaf4..310b803c62779 100644
--- a/mm/damon/paddr.c
+++ b/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 folio *folio, struct vm_area_struct *vma,
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);
}

--
2.39.2