This patch intends to improve the fsync performance by skipping remaining the
recovery information, only when there is no data that we should recover.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
fs/f2fs/file.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7c652b3..121689a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -133,6 +133,17 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t
end, int datasync)
return ret;
}
+ /*
+ * if there is no written data, don't waste time to write recovery info.
+ */
+ if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
+ !exist_written_data(sbi, inode->i_ino, APPEND_INO)) {
+ if (is_inode_flag_set(fi, FI_UPDATE_WRITE) &&
+ exist_written_data(sbi, inode->i_ino, UPDATE_INO))
+ goto flush_out;
+ goto out;
+ }
+
/* guarantee free sections for fsync */
f2fs_balance_fs(sbi);
@@ -188,6 +199,11 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t
end, int datasync)
ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
if (ret)
goto out;
+
+ /* once recovery info is written, don't need to tack this */
+ remove_dirty_inode(sbi, inode->i_ino, APPEND_INO);
+flush_out:
+ remove_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
ret = f2fs_issue_flush(F2FS_SB(inode->i_sb));
}
out:
--
1.8.5.2 (Apple Git-48)
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