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Received: from host-90-233-217-8.mobileonline.telia.com ([90.233.217.8]:64578 helo=localhost.localdomain) by server4.hayhost.am with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.98.1) (envelope-from ) id 1u9IJc-000000006yu-1kPD; Mon, 28 Apr 2025 10:50:08 +0400 From: Igor Belousov To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, hannes@cmpxchg.org, minchan@kernel.org, nphamcs@gmail.com, senozhatsky@chromium.org, shakeel.butt@linux.dev, yosry.ahmed@linux.dev, Igor Belousov Subject: [PATCH mm-new v2] mm/zblock: add debugfs Date: Mon, 28 Apr 2025 08:49:24 +0200 Message-ID: <20250428064924.53496-1-igor.b@beldev.am> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - server4.hayhost.am X-AntiAbuse: Original Domain - kvack.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - beldev.am X-Get-Message-Sender-Via: server4.hayhost.am: authenticated_id: igor.b@beldev.am X-Authenticated-Sender: server4.hayhost.am: igor.b@beldev.am X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 30F8EC000A X-Stat-Signature: aywy98wgy6sn1u9bs4g6111iibxbz6cn X-HE-Tag: 1745822990-127755 X-HE-Meta: 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 0xURvdS8 rP8se9MoJ2QXORaucH3UhtimTWobe3oKNCKIm5yfjCjbDvegMScP0kLH3IkYqWgbq51B9t3iRQAznI5PZQfRopFFN8RUckc9FeORfsIYE+Rzp5kHBIsARp8TfVVt0w7wK3QeSFUX+rVS09PyQWEw/Ti5bqAPaN+PzMlrSrW4PwUapGngoQE2IG0dfDS76NHXgXoBwwfZ8CWjUxpitTZOu4Pe2lmKDnkhXXYGSP1U79ACzK9UJtf+R2H/Upd/BBzNfhDE6B00PQmP1myHg1ve2Ly2Fr/QDgyhSH4UFliEk6XV6aUc6yc2zIjwRmfazbDpD4h9ymB+7CF9m5umuU+izocanRYn4wLVjx2zoO7wyKJHJR3AliGw30ksnMYFeqHcCanCH X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add debugfs entry to monitor number of blocks allocated for different block sizes. Signed-off-by: Igor Belousov --- mm/zblock.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/mm/zblock.c b/mm/zblock.c index 6afe6986260d..e2036a6e1617 100644 --- a/mm/zblock.c +++ b/mm/zblock.c @@ -17,6 +17,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include @@ -27,6 +28,7 @@ #include "zblock.h" static struct rb_root block_desc_tree = RB_ROOT; +static struct dentry *zblock_debugfs_root; /* Encode handle of a particular slot in the pool using metadata */ static inline unsigned long metadata_to_handle(struct zblock_block *block, @@ -111,6 +113,22 @@ static struct zblock_block *alloc_block(struct zblock_pool *pool, return block; } +static int zblock_blocks_show(struct seq_file *s, void *v) +{ + struct zblock_pool *pool = s->private; + int i; + + for (i = 0; i < ARRAY_SIZE(block_desc); i++) { + struct block_list *block_list = &pool->block_lists[i]; + + seq_printf(s, "%d: %ld blocks of %d pages (total %ld pages)\n", + i, block_list->block_count, 1 << block_desc[i].order, + block_list->block_count << block_desc[i].order); + } + return 0; +} +DEFINE_SHOW_ATTRIBUTE(zblock_blocks); + /***************** * API Functions *****************/ @@ -140,6 +158,9 @@ static struct zblock_pool *zblock_create_pool(gfp_t gfp) INIT_LIST_HEAD(&block_list->active_list); block_list->block_count = 0; } + + debugfs_create_file("blocks", S_IFREG | 0444, zblock_debugfs_root, + pool, &zblock_blocks_fops); return pool; } @@ -426,12 +447,15 @@ static int __init init_zblock(void) return ret; zpool_register_driver(&zblock_zpool_driver); + + zblock_debugfs_root = debugfs_create_dir("zblock", NULL); return 0; } static void __exit exit_zblock(void) { zpool_unregister_driver(&zblock_zpool_driver); + debugfs_remove_recursive(zblock_debugfs_root); delete_rbtree(); } -- 2.49.0