From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 518323B38BB for ; Wed, 16 Sep 2026 01:54:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789523708; cv=none; b=DT4K7Jq9eEbisRAbwT6BLq6Ly14jQXNiCHXWacYo3Uijtfyq7D9MoxjP6x7ir8j2cVSAbYe3ibR0zuSvWYEgtOjMfLcJC+sm7vcnpTwr4qPKfMSN3mjwlIL9qwFQ5jpBL+vtJx07NDIga13EtutzYSNLDh4VNxLz/farYtNlKrU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789523708; c=relaxed/simple; bh=5UPJMk2MNZMEu38F4hrTL+x72/O5nu+CvcCF5+PKS7w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JvavLLIkT/7H2l1ACs08eG1RKzHpzZSwq/VJWRn25qpovqGEBe016BeaPqDu3B6VshOl6RWJ1Qo1y4mUqkn9FclVH0sOcRRDxXzMn8fPRIFHocev7Dw2eIa8ZJKC/nHbUxVRsKeZCdMDM1mILARNf2YNBv1EmuFjau7OQFcS4zo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MoyC4MP5; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MoyC4MP5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12D0A1F0089F; Wed, 16 Sep 2026 01:54:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789523696; bh=+j9yWl8La9A19iYgRDqa/saO+ZRZSts/TuIkoS8lyys=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MoyC4MP5lIRywNIzmXR+ACXJ9K1UGKVthtsqw3eWZiR5SDugH0VZHNSJyqDWJ5lzu WJAWrJbdZSfsutL+ajblI68kVftU355drcRTM/H6qEfl6hcDzF4WWKMVvfx0AGl+NK tDpiAivQbgSG9N1Un9H2k9UikBrpzBA4xDJrWkiAs15QqZiEEOTlBpLqEY78NdLkcU lDuOSkSodbUfRg1pYuBYa4eNdTBYx6EifQTUF7xeODSGr1AX1rt9eu0itxMhvpbC4M hPT7J5JgoOE/OQcXLDr6pZ0agilbxCtkG5L+pF9n9Go9FP4TVhuygvt4fruSU5kvGg 0r2h8DifU0wHA== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v8 08/12] f2fs: cache: initialize compress cache Date: Wed, 16 Sep 2026 09:54:36 +0800 Message-ID: <20260916015440.2232938-9-chao@kernel.org> X-Mailer: git-send-email 2.55.0.1032.g73a4cd73de-goog In-Reply-To: <20260916015440.2232938-1-chao@kernel.org> References: <20260916015440.2232938-1-chao@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chao Yu This patch introduces compress_blocks in f2fs_sb_info structure, initializes and destroys the compress cache during filesystem mount and unmount. It adds an ino union field in struct f2fs_cached_block (sharing space with writeback linkage for zero memory overhead) to track per-inode cached blocks, and registers compress cache into the memory shrinker. Signed-off-by: Chao Yu --- fs/f2fs/cache.c | 9 ++++++++- fs/f2fs/cache.h | 14 ++++++++++---- fs/f2fs/f2fs.h | 6 ++++++ fs/f2fs/super.c | 7 +++++-- 4 files changed, 29 insertions(+), 7 deletions(-) diff --git a/fs/f2fs/cache.c b/fs/f2fs/cache.c index 3abd469dc011..3e6a198ef3b3 100644 --- a/fs/f2fs/cache.c +++ b/fs/f2fs/cache.c @@ -176,7 +176,10 @@ static struct f2fs_cached_block *f2fs_create_cache( entry->index = index; atomic_set(&entry->refcount, 0); - entry->next_entry = NULL; + if (!IS_COMPRESS_CACHE(cache)) + entry->next_entry = NULL; + else + entry->ino = 0; INIT_LIST_HEAD(&entry->list); entry->cache = cache; @@ -631,6 +634,10 @@ unsigned long f2fs_shrink_cache(struct f2fs_sb_info *sbi, return freed; freed += f2fs_do_shrink_cache(NODE_CACHE(sbi), nr_to_scan - freed); + if (freed >= nr_to_scan) + return freed; + + freed += f2fs_do_shrink_cache(COMPRESS_CACHE(sbi), nr_to_scan - freed); return freed; } diff --git a/fs/f2fs/cache.h b/fs/f2fs/cache.h index a36ee57adb1a..a8c24f5282fa 100644 --- a/fs/f2fs/cache.h +++ b/fs/f2fs/cache.h @@ -18,12 +18,15 @@ struct f2fs_rwsem; struct f2fs_io_info; enum page_type; -/* Represents a single cached block (meta, node) */ +/* Represents a single cached block (meta, node or compress) */ struct f2fs_cached_block { struct list_head list; /* LRU list head */ struct f2fs_cached_block_list *cache; /* parent cache list */ - struct f2fs_cached_block *next_entry; /* chain for merged BIO */ - unsigned long index; /* key in radix tree, (meta: pba, node: nid) */ + union { + struct f2fs_cached_block *next_entry;/* chain for merged BIO */ + nid_t ino; /* inode number for compress cache */ + }; + unsigned long index; /* key in radix tree, (meta/compress: pba, node: nid) */ unsigned long state; /* cache entry state (e.g., Dirty, UpToDate) */ void *data; /* blocksize-aligned memory (4KB or 16KB) */ atomic_t refcount; /* reference count */ @@ -34,6 +37,7 @@ struct f2fs_sb_info; enum f2fs_cache_type { F2FS_META_CACHE, F2FS_NODE_CACHE, + F2FS_COMPRESS_CACHE, }; /* Main cache control structure (per sb_info) */ @@ -43,12 +47,13 @@ struct f2fs_cached_block_list { spinlock_t tree_lock; /* Lock for radix tree */ struct list_head lru_list; /* Single global LRU list */ spinlock_t list_lock; /* Lock for LRU list */ - enum f2fs_cache_type type; /* Cache type (Node or Meta) */ + enum f2fs_cache_type type; /* Cache type (Node, Meta, Compress) */ unsigned long num_entries; /* Current number of entries */ }; #define IS_META_CACHE(cache) ((cache)->type == F2FS_META_CACHE) #define IS_NODE_CACHE(cache) ((cache)->type == F2FS_NODE_CACHE) +#define IS_COMPRESS_CACHE(cache) ((cache)->type == F2FS_COMPRESS_CACHE) /* Flags for f2fs_cached_block state */ enum f2fs_cached_state { @@ -196,6 +201,7 @@ void f2fs_drop_cache_range(struct f2fs_cached_block_list *cache, #define META_CACHE(sbi) (&(sbi)->meta_blocks) #define NODE_CACHE(sbi) (&(sbi)->node_blocks) +#define COMPRESS_CACHE(sbi) (&(sbi)->compress_blocks) #define f2fs_find_meta_cache(sbi, blkaddr) \ f2fs_find_cache(META_CACHE(sbi), blkaddr, 0) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d6681276708e..1e23e02cac8b 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2106,6 +2106,7 @@ struct f2fs_sb_info { /* f2fs internal cache */ struct f2fs_cached_block_list meta_blocks; struct f2fs_cached_block_list node_blocks; + struct f2fs_cached_block_list compress_blocks; /* internal cache flush thread */ struct f2fs_cache_kthread cache_thread; @@ -2384,6 +2385,11 @@ static inline bool f2fs_is_node_cache(struct f2fs_cached_block *entry) return entry->cache && entry->cache == NODE_CACHE(entry->cache->sbi); } +static inline bool f2fs_is_compress_cache(struct f2fs_cached_block *entry) +{ + return entry->cache && entry->cache == COMPRESS_CACHE(entry->cache->sbi); +} + static inline struct f2fs_bio *F2FS_BIO(struct bio *bio) { return container_of(bio, struct f2fs_bio, bio); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index bf42fbffa348..47259e8172fc 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2071,6 +2071,7 @@ static void f2fs_put_super(struct super_block *sb) f2fs_destroy_compress_inode(sbi); + f2fs_destroy_cache(COMPRESS_CACHE(sbi)); f2fs_destroy_cache(NODE_CACHE(sbi)); f2fs_destroy_cache(META_CACHE(sbi)); @@ -5263,11 +5264,12 @@ static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc) f2fs_init_cache(sbi, META_CACHE(sbi), F2FS_META_CACHE); f2fs_init_cache(sbi, NODE_CACHE(sbi), F2FS_NODE_CACHE); + f2fs_init_cache(sbi, COMPRESS_CACHE(sbi), F2FS_COMPRESS_CACHE); err = f2fs_get_valid_checkpoint(sbi); if (err) { f2fs_err(sbi, "Failed to get valid F2FS checkpoint"); - goto free_node_cache; + goto free_compress_cache; } if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG)) @@ -5582,7 +5584,8 @@ static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc) free_devices: destroy_device_list(sbi); kvfree(sbi->ckpt); -free_node_cache: +free_compress_cache: + f2fs_destroy_cache(COMPRESS_CACHE(sbi)); f2fs_destroy_cache(NODE_CACHE(sbi)); f2fs_destroy_cache(META_CACHE(sbi)); f2fs_destroy_page_array_cache(sbi); -- 2.49.0