diff options
| author | Ritesh Harjani (IBM) <ritesh.list@gmail.com> | 2025-05-16 01:20:54 +0530 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-05-20 10:31:12 -0400 |
| commit | 642e0dc73c5def8270ff7c55d750ff36a6ea5d10 (patch) | |
| tree | 419f0942cea73c8d07c70a44defaa9a31130f904 | |
| parent | b86629c2b2998338b4a715058b402e47d0b36206 (diff) | |
ext4: Enable support for ext4 multi-fsblock atomic write using bigalloc
Last couple of patches added the needed support for multi-fsblock atomic
writes using bigalloc. This patch ensures that filesystem advertizes the
needed atomic write unit min and max values for enabling multi-fsblock
atomic write support with bigalloc.
Acked-by: Darrick J. Wong <djwong@kernel.org>
Co-developed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://patch.msgid.link/5e45d7ed24499024b9079436ba6698dae5298e29.1747337952.git.ritesh.list@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/super.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9bf38e21dcda..a7f80ca01174 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4436,13 +4436,16 @@ static int ext4_handle_clustersize(struct super_block *sb) /* * ext4_atomic_write_init: Initializes filesystem min & max atomic write units. + * With non-bigalloc filesystem awu will be based upon filesystem blocksize + * & bdev awu units. + * With bigalloc it will be based upon bigalloc cluster size & bdev awu units. * @sb: super block - * TODO: Later add support for bigalloc */ static void ext4_atomic_write_init(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct block_device *bdev = sb->s_bdev; + unsigned int clustersize = EXT4_CLUSTER_SIZE(sb); if (!bdev_can_atomic_write(bdev)) return; @@ -4452,7 +4455,7 @@ static void ext4_atomic_write_init(struct super_block *sb) sbi->s_awu_min = max(sb->s_blocksize, bdev_atomic_write_unit_min_bytes(bdev)); - sbi->s_awu_max = min(sb->s_blocksize, + sbi->s_awu_max = min(clustersize, bdev_atomic_write_unit_max_bytes(bdev)); if (sbi->s_awu_min && sbi->s_awu_max && sbi->s_awu_min <= sbi->s_awu_max) { |