mm-damon-schemes-add-lru_prio-damos-action.patch removed from -mm tree

@@ -86,6 +86,7 @@ struct damon_target {
  * @DAMOS_PAGEOUT:	Call ``madvise()`` for the region with MADV_PAGEOUT.
  * @DAMOS_HUGEPAGE:	Call ``madvise()`` for the region with MADV_HUGEPAGE.
  * @DAMOS_NOHUGEPAGE:	Call ``madvise()`` for the region with MADV_NOHUGEPAGE.
+ * @DAMOS_LRU_PRIO:	Prioritize the region on its LRU lists.
  * @DAMOS_STAT:		Do nothing but count the stat.
  * @NR_DAMOS_ACTIONS:	Total number of DAMOS actions
  */

@@ -95,6 +96,7 @@ enum damos_action {
 	DAMOS_PAGEOUT,
 	DAMOS_HUGEPAGE,
 	DAMOS_NOHUGEPAGE,
+	DAMOS_LRU_PRIO,
 	DAMOS_STAT,		/* Do nothing but only record the stat */
 	NR_DAMOS_ACTIONS,
 };

45 lines not on this page · raw message

@@ -14,3 +14,5 @@ void damon_pmdp_mkold(pmd_t *pmd, struct
 
 int damon_pageout_score(struct damon_ctx *c, struct damon_region *r,
 			struct damos *s);
+int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
+			struct damos *s);

@@ -233,6 +233,22 @@ static unsigned long damon_pa_pageout(st
 	return applied * PAGE_SIZE;
 }
 
+static unsigned long damon_pa_mark_accessed(struct damon_region *r)
+{
+	unsigned long addr, applied = 0;
+
+	for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
+		struct page *page = damon_get_page(PHYS_PFN(addr));
+
+		if (!page)
+			continue;
+		mark_page_accessed(page);
+		put_page(page);
+		applied++;
+	}
+	return applied * PAGE_SIZE;
+}
+
 static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
 		struct damon_target *t, struct damon_region *r,
 		struct damos *scheme)

@@ -240,6 +256,8 @@ static unsigned long damon_pa_apply_sche
 	switch (scheme->action) {
 	case DAMOS_PAGEOUT:
 		return damon_pa_pageout(r);
+	case DAMOS_LRU_PRIO:
+		return damon_pa_mark_accessed(r);
 	default:
 		break;
 	}

@@ -253,6 +271,8 @@ static int damon_pa_scheme_score(struct
 	switch (scheme->action) {
 	case DAMOS_PAGEOUT:
 		return damon_pageout_score(context, r, scheme);
+	case DAMOS_LRU_PRIO:
+		return damon_hot_score(context, r, scheme);
 	default:
 		break;
 	}

@@ -762,6 +762,7 @@ static const char * const damon_sysfs_da
 	"pageout",
 	"hugepage",
 	"nohugepage",
+	"lru_prio",
 	"stat",
 };