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 1D453359FA0; Fri, 9 Jan 2026 12:20:42 +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=1767961242; cv=none; b=qPleYCpSZKTIrjqSKO+za2rpzriUysrPA98fJQUyvLrTYwMR0368PF7gE0TCAlkSzH/Evk8J7tMkYPuzHPzQdlUqJ5piUhlcnG+5e2f6ZWEOEWkY21QWbw+YgEAoUQrGjYUuoxr3Pw2ZQ7Yfokj83Y20oytU0fJqbo4ftLqUnq4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961242; c=relaxed/simple; bh=PkMQd5tNb7lXolBGKCAhmqNDg/2F/jnXVqntJm6WEbg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QoltO991ZxersCZILrlyN6pboEDS70D4rCtrz+jC+mJPbNBfDaWGEKEtEwTM1Fpo/VTsZpRIAPFiwMczeTiwXFPXt3dvE+7o3BMoJ4Xrr69G2TP95C1FtBt0hWoXnncEqI5O4JKY5mAFeLvOPNv9imsDTOuXsfIbnMMLtJRIj80= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PSoa9ZkY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PSoa9ZkY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A04A5C4CEF1; Fri, 9 Jan 2026 12:20:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767961242; bh=PkMQd5tNb7lXolBGKCAhmqNDg/2F/jnXVqntJm6WEbg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PSoa9ZkYVustAywgX4+pCSBsLH8R5fD/NBwxWA1ByHZA/imjwWs9CrFltbqgOFFKi SPwGFp2vmYkPaC897Rvc1CSYlVDSLJlLVKn2irfAjzlphuMHUCd5kbomLRMe2tvGD5 jSPYZPGpRXmpUXfxZEePFahEOOJS62MeUG7NqcuI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 6.6 685/737] f2fs: keep POSIX_FADV_NOREUSE ranges Date: Fri, 9 Jan 2026 12:43:44 +0100 Message-ID: <20260109112159.826654195@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- 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(-) --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -100,6 +100,7 @@ static void update_general_status(struct 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, 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", --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -837,6 +837,11 @@ 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 */ @@ -1261,6 +1266,7 @@ 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, }; @@ -1613,6 +1619,9 @@ 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 */ @@ -3948,7 +3957,8 @@ 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; --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2435,6 +2435,52 @@ static int f2fs_ioc_shutdown(struct file 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); @@ -5078,12 +5124,16 @@ static int f2fs_file_fadvise(struct file } 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 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -811,6 +811,19 @@ int f2fs_write_inode(struct inode *inode 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 *inod f2fs_bug_on(sbi, get_dirty_pages(inode)); f2fs_remove_dirty_inode(inode); + f2fs_remove_donate_inode(inode); f2fs_destroy_extent_tree(inode); --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1413,6 +1413,7 @@ static struct inode *f2fs_alloc_inode(st 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);