probe kernel.mark("ext4_sync_file")
{
	t = gettimeofday_ms();
	printf("%d.%d:ext4_sync_file: datasync %d ino %d parent %d\n",
		t / 1000, t % 1000, $arg1, $arg3, $arg4)
}

probe kernel.mark("ext4_sync_fs")
{
	t = gettimeofday_ms();
	printf("%d.%d:ext4_sync_fs: wait %d\n", t / 1000, t % 1000,
		$arg2)
}

probe kernel.mark("jbd2_start_commit")
{
	t = gettimeofday_ms();
	printf("%d.%d:jbd2_start_commit: transaction %d\n",
		t / 1000, t % 1000, $arg2)
}

probe kernel.mark("jbd2_end_commit")
{
	t = gettimeofday_ms();
	printf("%d.%d:jbd2_end_commit: transaction %d head %d\n",
	       t / 1000, t % 1000, $arg2, $arg3)
}

probe kernel.mark("jbd2_checkpoint")
{
	t = gettimeofday_ms();
	printf("%d.%d:jbd2_checkpoint: need_checkpoint %d\n", 
		t / 1000, t % 1000, $arg2);
}