From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 622B032E15B for ; Tue, 30 Dec 2025 17:05:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767114345; cv=none; b=QL91UHzytiRw9MwCjIwo77YAI0Z+sKnQ6IUwwrlY8cuINU3hA21PnmSbsdH8olT1WB/GsezwLv0FbBdL3aCE/Yknbx/+d+rRAW2LV+RRE1pbZ5U+KhQGxZ26KVcw44IbK+mPzRJ6TyRgoFLl8UcNJqPfif8ElgQnlwbpr8fo/3I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767114345; c=relaxed/simple; bh=7GOSs5GY8yLgj4JQJJIXNZyLv95ZGf7bWScDjMhcea4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I4p8JsS8g5GBA+6bCK/Tg+A4FSZh+KEYfQa8iiAKQj9MZxiVY1gv+/GXyIHDxMgwPLtLl/pMsO2WF/Gd8cStqw/qKKqr0rtHlyUR5rqaGDV7zPnmu8NOgs7I5X4bu6UNP+sZU3XFJAlH4Yai9QK7GVVCsGmoYU4qLBhStqDpTb0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DBDtpmB6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DBDtpmB6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 789DBC19422; Tue, 30 Dec 2025 17:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767114345; bh=7GOSs5GY8yLgj4JQJJIXNZyLv95ZGf7bWScDjMhcea4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DBDtpmB6uoLI4yFF1Di9Ec2KfKhwsgzCB4jq9ctAUq/hOPW9DI9WQ8/HWg/6zhR09 dpNgrPhTfs+whi0HaKZYxm8HbWwny1jXJUAhSHNaSfnCi3Axl78bgJ82kaN8z3xMhV DzgD2Rhmqi7btpEbRKMoGtVva23Z6bRE6C4c434EVNuxaKtLAIsdV84OmEf1Cq83+L bDCHQSoGpsYOC56rxa7yGqc78Z23Beqil8BPL7vlocm+cpBczLoCUOs9o+butJeZK+ UFxB4SQyT7Id7fbO3bUbCOdhAgNwubpsKBnxbFBAzPYl4PzfZ7k4Rznt3svc/biOg7 TZ7xqNUd2Ce0w== From: Sasha Levin To: stable@vger.kernel.org Cc: Jaegeuk Kim , Chao Yu , Sasha Levin Subject: [PATCH 6.6.y 2/4] f2fs: keep POSIX_FADV_NOREUSE ranges Date: Tue, 30 Dec 2025 12:05:38 -0500 Message-ID: <20251230170540.2336679-2-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251230170540.2336679-1-sashal@kernel.org> References: <2025122922-tyke-slip-919d@gregkh> <20251230170540.2336679-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jaegeuk Kim [ Upstream commit ef0c333cad8d1940f132a7ce15f15920216a3bd5 ] This patch records POSIX_FADV_NOREUSE ranges for users to reclaim the caches instantly off from LRU. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Stable-dep-of: 10b591e7fb7c ("f2fs: fix to avoid updating compression context during writeback") Signed-off-by: Sasha Levin --- fs/f2fs/debug.c | 3 +++ fs/f2fs/f2fs.h | 12 +++++++++- fs/f2fs/file.c | 60 ++++++++++++++++++++++++++++++++++++++++++++----- fs/f2fs/inode.c | 14 ++++++++++++ fs/f2fs/super.c | 1 + 5 files changed, 84 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c index 0d02224b99b7..68773b48ed4d 100644 --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -100,6 +100,7 @@ static void update_general_status(struct f2fs_sb_info *sbi) si->ndirty_imeta = get_pages(sbi, F2FS_DIRTY_IMETA); si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE]; si->ndirty_files = sbi->ndirty_inode[FILE_INODE]; + si->ndonate_files = sbi->donate_files; si->nquota_files = sbi->nquota_files; si->ndirty_all = sbi->ndirty_inode[DIRTY_META]; si->aw_cnt = atomic_read(&sbi->atomic_files); @@ -436,6 +437,8 @@ static int stat_show(struct seq_file *s, void *v) si->compr_inode, si->compr_blocks); seq_printf(s, " - Swapfile Inode: %u\n", si->swapfile_inode); + seq_printf(s, " - Donate Inode: %u\n", + si->ndonate_files); seq_printf(s, " - Orphan/Append/Update Inode: %u, %u, %u\n", si->orphans, si->append, si->update); seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 9112c3140ede..460c29f95c17 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -831,6 +831,11 @@ struct f2fs_inode_info { #endif struct list_head dirty_list; /* dirty list for dirs and files */ struct list_head gdirty_list; /* linked in global dirty list */ + + /* linked in global inode list for cache donation */ + struct list_head gdonate_list; + pgoff_t donate_start, donate_end; /* inclusive */ + struct task_struct *atomic_write_task; /* store atomic write task */ struct extent_tree *extent_tree[NR_EXTENT_CACHES]; /* cached extent_tree entry */ @@ -1255,6 +1260,7 @@ enum inode_type { DIR_INODE, /* for dirty dir inode */ FILE_INODE, /* for dirty regular/symlink inode */ DIRTY_META, /* for all dirtied inode metadata */ + DONATE_INODE, /* for all inode to donate pages */ NR_INODE_TYPE, }; @@ -1607,6 +1613,9 @@ struct f2fs_sb_info { unsigned int warm_data_age_threshold; unsigned int last_age_weight; + /* control donate caches */ + unsigned int donate_files; + /* basic filesystem units */ unsigned int log_sectors_per_block; /* log2 sectors per block */ unsigned int log_blocksize; /* log2 block size */ @@ -3943,7 +3952,8 @@ struct f2fs_stat_info { unsigned long long allocated_data_blocks; int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta; int ndirty_data, ndirty_qdata; - unsigned int ndirty_dirs, ndirty_files, nquota_files, ndirty_all; + unsigned int ndirty_dirs, ndirty_files, ndirty_all; + unsigned int nquota_files, ndonate_files; int nats, dirty_nats, sits, dirty_sits; int free_nids, avail_nids, alloc_nids; int total_count, utilization; diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 31d20800b475..564d83e67043 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2432,6 +2432,52 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) return ret; } +static void f2fs_keep_noreuse_range(struct inode *inode, + loff_t offset, loff_t len) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + u64 max_bytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode)); + u64 start, end; + + if (!S_ISREG(inode->i_mode)) + return; + + if (offset >= max_bytes || len > max_bytes || + (offset + len) > max_bytes) + return; + + start = offset >> PAGE_SHIFT; + end = DIV_ROUND_UP(offset + len, PAGE_SIZE); + + inode_lock(inode); + if (f2fs_is_atomic_file(inode)) { + inode_unlock(inode); + return; + } + + spin_lock(&sbi->inode_lock[DONATE_INODE]); + /* let's remove the range, if len = 0 */ + if (!len) { + if (!list_empty(&F2FS_I(inode)->gdonate_list)) { + list_del_init(&F2FS_I(inode)->gdonate_list); + sbi->donate_files--; + } + } else { + if (list_empty(&F2FS_I(inode)->gdonate_list)) { + list_add_tail(&F2FS_I(inode)->gdonate_list, + &sbi->inode_list[DONATE_INODE]); + sbi->donate_files++; + } else { + list_move_tail(&F2FS_I(inode)->gdonate_list, + &sbi->inode_list[DONATE_INODE]); + } + F2FS_I(inode)->donate_start = start; + F2FS_I(inode)->donate_end = end - 1; + } + spin_unlock(&sbi->inode_lock[DONATE_INODE]); + inode_unlock(inode); +} + static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); @@ -5075,12 +5121,16 @@ static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len, } err = generic_fadvise(filp, offset, len, advice); - if (!err && advice == POSIX_FADV_DONTNEED && - test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) && - f2fs_compressed_file(inode)) - f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino); + if (err) + return err; - return err; + if (advice == POSIX_FADV_DONTNEED && + (test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) && + f2fs_compressed_file(inode))) + f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino); + else if (advice == POSIX_FADV_NOREUSE) + f2fs_keep_noreuse_range(inode, offset, len); + return 0; } #ifdef CONFIG_COMPAT diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index c67dbe4839e7..7a961672737e 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -811,6 +811,19 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) return 0; } +static void f2fs_remove_donate_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + if (list_empty(&F2FS_I(inode)->gdonate_list)) + return; + + spin_lock(&sbi->inode_lock[DONATE_INODE]); + list_del_init(&F2FS_I(inode)->gdonate_list); + sbi->donate_files--; + spin_unlock(&sbi->inode_lock[DONATE_INODE]); +} + /* * Called at the last iput() if i_nlink is zero */ @@ -844,6 +857,7 @@ void f2fs_evict_inode(struct inode *inode) f2fs_bug_on(sbi, get_dirty_pages(inode)); f2fs_remove_dirty_inode(inode); + f2fs_remove_donate_inode(inode); f2fs_destroy_extent_tree(inode); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index b9913ab526fd..ffff81caa244 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1413,6 +1413,7 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) spin_lock_init(&fi->i_size_lock); INIT_LIST_HEAD(&fi->dirty_list); INIT_LIST_HEAD(&fi->gdirty_list); + INIT_LIST_HEAD(&fi->gdonate_list); init_f2fs_rwsem(&fi->i_gc_rwsem[READ]); init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]); init_f2fs_rwsem(&fi->i_xattr_sem); -- 2.51.0