[RFC PATCH v3 1/7] mm/damon/paddr: refactor DAMOS_PAGEOUT with migration_mode

Honggyu Kim
2024-04-05T06:09:11Z

This is a preparation patch that introduces migration modes.

The damon_pa_pageout is renamed to damon_pa_migrate and it receives an
extra argument for migration_mode.

No functional changes applied.

Signed-off-by: Honggyu Kim <honggyu.kim@sk.com>
---
mm/damon/paddr.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 081e2a325778..277a1c4d833c 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -224,7 +224,12 @@ static bool damos_pa_filter_out(struct damos *scheme, struct folio *folio)
return false;
}

-static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
+enum migration_mode {
+ MIG_PAGEOUT,
+};
+
+static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
+ enum migration_mode mm)
{
unsigned long addr, applied;
LIST_HEAD(folio_list);
@@ -249,7 +254,14 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
put_folio:
folio_put(folio);
}
- applied = reclaim_pages(&folio_list);
+ switch (mm) {
+ case MIG_PAGEOUT:
+ applied = reclaim_pages(&folio_list);
+ break;
+ default:
+ /* Unexpected migration mode. */
+ return 0;
+ }
cond_resched();
return applied * PAGE_SIZE;
}
@@ -297,7 +309,7 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
{
switch (scheme->action) {
case DAMOS_PAGEOUT:
- return damon_pa_pageout(r, scheme);
+ return damon_pa_migrate(r, scheme, MIG_PAGEOUT);
case DAMOS_LRU_PRIO:
return damon_pa_mark_accessed(r, scheme);
case DAMOS_LRU_DEPRIO:
--
2.34.1