diff options
| author | Baokun Li <libaokun1@huawei.com> | 2025-11-21 17:06:36 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-11-28 22:35:26 -0500 |
| commit | 8611e608a8fa01e8b82c9008b4dac9f24531ae0f (patch) | |
| tree | f83ef3585277067a3c14d0f4d68fbb87066b6505 | |
| parent | 58297412edf077870eedce2481db5755b4e98474 (diff) | |
ext4: introduce s_min_folio_order for future BS > PS support
This commit introduces the s_min_folio_order field to the ext4_sb_info
structure. This field will store the minimum folio order required by the
current filesystem, laying groundwork for future support of block sizes
greater than PAGE_SIZE.
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Message-ID: <20251121090654.631996-7-libaokun@huaweicloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 3 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 3 | ||||
| -rw-r--r-- | fs/ext4/super.c | 10 |
3 files changed, 10 insertions, 6 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 6c2540e94c78..0502afa6f6e5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1697,6 +1697,9 @@ struct ext4_sb_info { /* record the last minlen when FITRIM is called. */ unsigned long s_last_trim_minblks; + /* minimum folio order of a page cache allocation */ + unsigned int s_min_folio_order; + /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5cf392142c8c..ff697adab5f6 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5183,7 +5183,8 @@ void ext4_set_inode_mapping_order(struct inode *inode) if (!ext4_should_enable_large_folio(inode)) return; - mapping_set_folio_order_range(inode->i_mapping, 0, + mapping_set_folio_order_range(inode->i_mapping, + EXT4_SB(inode->i_sb)->s_min_folio_order, EXT4_MAX_PAGECACHE_ORDER(inode)); } diff --git a/fs/ext4/super.c b/fs/ext4/super.c index f39679892e71..2286cd1e3cb8 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5109,11 +5109,8 @@ static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, * If the default block size is not the same as the real block size, * we need to reload it. */ - if (sb->s_blocksize == blocksize) { - *lsb = logical_sb_block; - sbi->s_sbh = bh; - return 0; - } + if (sb->s_blocksize == blocksize) + goto success; /* * bh must be released before kill_bdev(), otherwise @@ -5144,6 +5141,9 @@ static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); goto out; } + +success: + sbi->s_min_folio_order = get_order(blocksize); *lsb = logical_sb_block; sbi->s_sbh = bh; return 0; |