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 4C00E447801 for ; Thu, 27 Aug 2026 12:25:59 +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=1787833563; cv=none; b=QbFo/4l9ZZe5GznDXS+aBpPTECJ4n74VNPoxCnjM1nBAt4Qr6S8lhxShY/+ycNeLapH3ZtTpxMjFwrhJv4bZ9QcTSwJTBZ7T2mc4DGmy+uwWPAwO4x5SDjcP8ZfzhmHQ7skkKHVjngzOXF/V/2OITSTlkLjFy6AmIDOkyKrKJf8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787833563; c=relaxed/simple; bh=U6s6a//SjFUxtpcZ8q8SozOsBh6v8DyNq9nKx4nWW5Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aTCsGshNaVTseBf8FHM8xA+ICR5mt86JZi60t98p3PcZ7vl1J+Gd1NTwO5edPiHZz6hKbbNngE8YujM07hqxbpsY42Ax80UPM0Xbdynel4kxyR1SklEybKbYO0x35SgU+sagUAxhu06Hz1leEhaeQ62xHYTP6jdJD7Ge7j1GQ58= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AM1DRlnf; 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="AM1DRlnf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2FCEC1F00ADB; Thu, 27 Aug 2026 12:25:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787833559; bh=9Zx++dLFAc2bUqW4qLmRSUGyrS2d6bWvWxtu9F3oozQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AM1DRlnfhejcl4jstPdz7e5x0u3U4Rfb9Dd7UoUeMTW1qmgIGangaAe616/DCtkb3 9r6v797XUOz1nmBvhxyK5s7bJFgLAqG9CrIhzM3fEg0GZ4Hem0YpkF4I+woKu6mIAu L3nwCpu/dnjhYrmM9Qjp22U7kXETRSdCf+yKsSFfZa2bKezKfLZxtYGxh3mCqCflj6 dZTbcjWcO0BtFQ1066aKXQvATEWFNSbLUD1cptSqHCayTDSob+0yoI6TEYMPlZ8e/T hvbQOLV2zwT9rHxD2OiJXMnt/RMaSyP8P4Q0POVG1TH58JJd07TIJpvhHdl67jukaY 0y5ydPvghL1yg== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v4 08/12] f2fs: cache: initialize compress cache Date: Thu, 27 Aug 2026 20:25:36 +0800 Message-ID: <20260827122541.19967-9-chao@kernel.org> X-Mailer: git-send-email 2.55.0.887.g758fc8c411-goog In-Reply-To: <20260827122541.19967-1-chao@kernel.org> References: <20260827122541.19967-1-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 | 9 ++++++++- 4 files changed, 32 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/cache.c b/fs/f2fs/cache.c index d06b046a9c25..058e62c44152 100644 --- a/fs/f2fs/cache.c +++ b/fs/f2fs/cache.c @@ -198,7 +198,10 @@ 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; @@ -645,6 +648,10 @@ 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 989307feec3b..474aaf5966f2 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 { @@ -185,6 +190,7 @@ void f2fs_stop_cache_wb_thread(struct f2fs_sb_info *sbi); #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 ce7885864982..5b1b3104ec20 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2107,6 +2107,7 @@ 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; @@ -2328,6 +2329,11 @@ 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 60498877df88..6b42b736a662 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2052,6 +2052,7 @@ 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)); @@ -5231,10 +5232,14 @@ static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc) if (err) goto free_meta_cache; + err = f2fs_init_cache(sbi, COMPRESS_CACHE(sbi), F2FS_COMPRESS_CACHE); + if (err) + goto free_node_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)) @@ -5555,6 +5560,8 @@ static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc) free_devices: destroy_device_list(sbi); kvfree(sbi->ckpt); +free_compress_cache: + f2fs_destroy_cache(COMPRESS_CACHE(sbi)); free_node_cache: f2fs_destroy_cache(NODE_CACHE(sbi)); free_meta_cache: -- 2.49.0