lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ext4: add fsync batch tuning knobs

Browse Source 
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>
This commit is contained in:
Theodore Ts'o
2009-01-03 20:27:38 -05:00
parent d7cfa4684d
commit 30773840c1
7 changed files with 91 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
fs/ext4/ext4.h
View File

@@ -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];
@@ -805,6 +806,12 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
#define EXT4_DEFM_JMODE_ORDERED 0x0040
#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
*/