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authorTheodore Ts'o <tytso@mit.edu>2009-01-03 20:27:38 -0500
committerTheodore Ts'o <tytso@mit.edu>2009-01-03 20:27:38 -0500
commit30773840c19cea60dcef39545960d541b1ac1cf8 (patch)
treef220a2dce451a40dc7264e8fd70c77c5a3908873 /include/linux/jbd2.h
parentd7cfa4684d82f58e5d7cb73b8a3c88c169937f25 (diff)
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 'include/linux/jbd2.h')
-rw-r--r--include/linux/jbd2.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index ab8cef130c28..a3cd647ea1bc 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -956,6 +956,14 @@ struct journal_s
*/
u64 j_average_commit_time;
+ /*
+ * minimum and maximum times that we should wait for
+ * additional filesystem operations to get batched into a
+ * synchronous handle in microseconds
+ */
+ u32 j_min_batch_time;
+ u32 j_max_batch_time;
+
/* This function is called when a transaction is closed */
void (*j_commit_callback)(journal_t *,
transaction_t *);