linux-kernel - [PATCHv2 5/6] zsmalloc: extend compaction statistics

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230223030451.543162-6-senozhatsky@chromium.org>
Date:   Thu, 23 Feb 2023 12:04:50 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Minchan Kim <minchan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Yosry Ahmed <yosryahmed@...gle.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCHv2 5/6] zsmalloc: extend compaction statistics

Extend zsmalloc zs_pool_stats with a new member that
holds the number of objects pool compaction moved
between pool pages.

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 include/linux/zsmalloc.h | 2 ++
 mm/zsmalloc.c            | 1 +
 2 files changed, 3 insertions(+)

diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
index a48cd0ffe57d..8b3fa5b4a68c 100644
--- a/include/linux/zsmalloc.h
+++ b/include/linux/zsmalloc.h
@@ -36,6 +36,8 @@ enum zs_mapmode {
 struct zs_pool_stats {
 	/* How many pages were migrated (freed) */
 	atomic_long_t pages_compacted;
+	/* How many objects were migrated during compaction */
+	atomic_long_t objs_moved;
 };
 
 struct zs_pool;
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index eacf9e32da5c..f7e69df48fb0 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1815,6 +1815,7 @@ static void migrate_zspage(struct zs_pool *pool, struct size_class *class,
 		obj_idx++;
 		record_obj(handle, free_obj);
 		obj_free(class->size, used_obj, NULL);
+		atomic_long_inc(&pool->stats.objs_moved);
 	}
 
 	/* Remember last position in this iteration */
-- 
2.39.2.637.g21b0678d19-goog