From: SeongJae Park <sj@kernel.org>
Date: Wed, 11 Mar 2026 05:29:24 +0000 (-0700)
Subject: mm/damon/core: receive addr_unit on damon_set_region_biggest_system_ram_default()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=eabc2eddb2767e0ed90f98a65744bf4c8e287db7;p=thirdparty%2Flinux.git

mm/damon/core: receive addr_unit on damon_set_region_biggest_system_ram_default()

damon_find_biggest_system_ram() was not supporting addr_unit in the past.
Hence, its caller, damon_set_region_biggest_system_ram_default(), was also
not supporting addr_unit.  The previous commit has updated the inner
function to support addr_unit.  There is no more reason to not support
addr_unit on damon_set_region_biggest_system_ram_default().  Rather, it
makes unnecessary inconsistency on support of addr_unit.  Update it to
receive addr_unit and handle it inside.

Link: https://lkml.kernel.org/r/20260311052927.93921-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Yang yingliang <yangyingliang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/damon.h b/include/linux/damon.h
index e44e2132ccaf6..d9a3babbafc16 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -994,6 +994,7 @@ int damos_walk(struct damon_ctx *ctx, struct damos_walk_control *control);
 
 int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 				unsigned long *start, unsigned long *end,
+				unsigned long addr_unit,
 				unsigned long min_region_sz);
 
 #endif	/* CONFIG_DAMON */
diff --git a/mm/damon/core.c b/mm/damon/core.c
index f5f46ba5d537c..01c892a1dcd2b 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -3110,6 +3110,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start,
  * @t:		The monitoring target to set the region.
  * @start:	The pointer to the start address of the region.
  * @end:	The pointer to the end address of the region.
+ * @addr_unit:	The address unit for the damon_ctx of @t.
  * @min_region_sz:	Minimum region size.
  *
  * This function sets the region of @t as requested by @start and @end.  If the
@@ -3122,7 +3123,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start,
  */
 int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 			unsigned long *start, unsigned long *end,
-			unsigned long min_region_sz)
+			unsigned long addr_unit, unsigned long min_region_sz)
 {
 	struct damon_addr_range addr_range;
 
@@ -3130,12 +3131,12 @@ int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 		return -EINVAL;
 
 	if (!*start && !*end &&
-		!damon_find_biggest_system_ram(start, end, 1))
+			!damon_find_biggest_system_ram(start, end, addr_unit))
 		return -EINVAL;
 
 	addr_range.start = *start;
 	addr_range.end = *end;
-	return damon_set_regions(t, &addr_range, 1, min_region_sz);
+	return damon_set_regions(t, &addr_range, addr_unit, min_region_sz);
 }
 
 /*
diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 7bc5c0b2aea3e..133ea17e258df 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -345,6 +345,7 @@ static int damon_lru_sort_apply_parameters(void)
 	err = damon_set_region_biggest_system_ram_default(param_target,
 					&monitor_region_start,
 					&monitor_region_end,
+					param_ctx->addr_unit,
 					param_ctx->min_region_sz);
 	if (err)
 		goto out;
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 43d76f5bed449..01f2f6cdbcdfe 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -251,6 +251,7 @@ static int damon_reclaim_apply_parameters(void)
 	err = damon_set_region_biggest_system_ram_default(param_target,
 					&monitor_region_start,
 					&monitor_region_end,
+					param_ctx->addr_unit,
 					param_ctx->min_region_sz);
 	if (err)
 		goto out;