linux-kernel - [PATCH 2/3] mm/zsmalloc: remove_zspage() don't need fullness parameter

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Message-Id: <20240220-b4-zsmalloc-cleanup-v1-2-5c5ee4ccdd87@bytedance.com>
Date: Tue, 20 Feb 2024 06:53:01 +0000
From: Chengming Zhou <zhouchengming@...edance.com>
To: nphamcs@...il.com, Andrew Morton <akpm@...ux-foundation.org>, Sergey Senozhatsky <senozhatsky@...omium.org>,
 hannes@...xchg.org, yosryahmed@...gle.com, Minchan Kim <minchan@...nel.org>
Cc: Chengming Zhou <zhouchengming@...edance.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 2/3] mm/zsmalloc: remove_zspage() don't need fullness parameter

We must remove_zspage() from its current fullness list, then use
insert_zspage() to update its fullness and insert to new fullness list.
Obviously, remove_zspage() doesn't need the fullness parameter.

Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>
---
 mm/zsmalloc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index a6653915bf17..c39fac9361d7 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -687,10 +687,10 @@ static void insert_zspage(struct size_class *class,
  * This function removes the given zspage from the freelist identified
  * by <class, fullness_group>.
  */
-static void remove_zspage(struct size_class *class,
-				struct zspage *zspage,
-				int fullness)
+static void remove_zspage(struct size_class *class, struct zspage *zspage)
 {
+	int fullness = zspage->fullness;
+
 	VM_BUG_ON(list_empty(&class->fullness_list[fullness]));
 
 	list_del_init(&zspage->list);
@@ -716,7 +716,7 @@ static int fix_fullness_group(struct size_class *class, struct zspage *zspage)
 	if (newfg == currfg)
 		goto out;
 
-	remove_zspage(class, zspage, currfg);
+	remove_zspage(class, zspage);
 	insert_zspage(class, zspage, newfg);
 out:
 	return newfg;
@@ -878,7 +878,7 @@ static void free_zspage(struct zs_pool *pool, struct size_class *class,
 		return;
 	}
 
-	remove_zspage(class, zspage, ZS_INUSE_RATIO_0);
+	remove_zspage(class, zspage);
 	__free_zspage(pool, class, zspage);
 }
 
@@ -1609,7 +1609,7 @@ static struct zspage *isolate_src_zspage(struct size_class *class)
 		zspage = list_first_entry_or_null(&class->fullness_list[fg],
 						  struct zspage, list);
 		if (zspage) {
-			remove_zspage(class, zspage, fg);
+			remove_zspage(class, zspage);
 			return zspage;
 		}
 	}
@@ -1626,7 +1626,7 @@ static struct zspage *isolate_dst_zspage(struct size_class *class)
 		zspage = list_first_entry_or_null(&class->fullness_list[fg],
 						  struct zspage, list);
 		if (zspage) {
-			remove_zspage(class, zspage, fg);
+			remove_zspage(class, zspage);
 			return zspage;
 		}
 	}

-- 
b4 0.10.1