linux-kernel - [RFC PATCH -next 14/16] mm/damon/core: convert sz to byte units when updating state

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Message-ID: <20250813050706.1564229-15-yanquanmin1@huawei.com>
Date: Wed, 13 Aug 2025 13:07:04 +0800
From: Quanmin Yan <yanquanmin1@...wei.com>
To: <sj@...nel.org>
CC: <akpm@...ux-foundation.org>, <damon@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<yanquanmin1@...wei.com>, <wangkefeng.wang@...wei.com>, <zuoze1@...wei.com>
Subject: [RFC PATCH -next 14/16] mm/damon/core: convert sz to byte units when updating state

After introducing ctx->addr_unit, the unit of sz might not
be in bytes. However, sz_applied is returned in bytes after
processing by paddr. To maintain external consistency, sz
is converted to byte units when updating the state.

Signed-off-by: Quanmin Yan <yanquanmin1@...wei.com>
---
 mm/damon/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index b162aa1156fc..bc764f9dc5c5 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1889,7 +1889,9 @@ static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t,
 		r->age = 0;
 
 update_stat:
-	damos_update_stat(s, sz, sz_applied, sz_ops_filter_passed);
+	damos_update_stat(s,
+			sz * (c->ops.id == DAMON_OPS_PADDR ? c->addr_unit : 1),
+			sz_applied, sz_ops_filter_passed);
 }
 
 static void damon_do_apply_schemes(struct damon_ctx *c,
-- 
2.34.1