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| author | Theodore Ts'o <tytso@mit.edu> | 2009-01-03 20:27:38 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-01-03 20:27:38 -0500 |
| commit | 30773840c19cea60dcef39545960d541b1ac1cf8 (patch) | |
| tree | f220a2dce451a40dc7264e8fd70c77c5a3908873 /fs/ext4/ext4.h | |
| parent | d7cfa4684d82f58e5d7cb73b8a3c88c169937f25 (diff) | |
| download | blackbird-op-linux-30773840c19cea60dcef39545960d541b1ac1cf8.tar.gz blackbird-op-linux-30773840c19cea60dcef39545960d541b1ac1cf8.zip | |
ext4: add fsync batch tuning knobs
Add new mount options, min_batch_time and max_batch_time, which
controls how long the jbd2 layer should wait for additional filesystem
operations to get batched with a synchronous write transaction.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index ac8551e0b70a..9ba9fd6d14da 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -328,6 +328,7 @@ struct ext4_mount_options { uid_t s_resuid; gid_t s_resgid; unsigned long s_commit_interval; + u32 s_min_batch_time, s_max_batch_time; #ifdef CONFIG_QUOTA int s_jquota_fmt; char *s_qf_names[MAXQUOTAS]; @@ -806,6 +807,12 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) #define EXT4_DEFM_JMODE_WBACK 0x0060 /* + * Default journal batch times + */ +#define EXT4_DEF_MIN_BATCH_TIME 0 +#define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ + +/* * Structure of a directory entry */ #define EXT4_NAME_LEN 255 |
