From dc22f3e142bc06fded936812aaaa68a1ea3d3d7b Mon Sep 17 00:00:00 2001
From: szaka <szaka>
Date: Sun, 8 Jan 2006 14:54:55 +0000
Subject: [PATCH] Adjust $LogFile size for 3.1 volumes which got much bigger
 (the small $LogFile became a performance bootleneck for the increasingly
 faster disks)

---
 ntfsprogs/mkntfs.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/ntfsprogs/mkntfs.c b/ntfsprogs/mkntfs.c
index a8f7c51b..09b569e1 100644
--- a/ntfsprogs/mkntfs.c
+++ b/ntfsprogs/mkntfs.c
@@ -3921,11 +3921,30 @@ static BOOL mkntfs_initialize_rl_logfile(void)
 		g_logfile_size = 512LL * 1024;		/*   -> 512kiB	*/
 	else if (volume_size <= 200LL * 1024 * 1024)	/* < 200MiB	*/
 		g_logfile_size = 2048LL * 1024;		/*   -> 2MiB	*/
-	else if (volume_size >= 400LL << 20)		/* > 400MiB	*/
-		g_logfile_size = 4 << 20;		/*   -> 4MiB	*/
-	else
-		g_logfile_size = (volume_size / 100) &
-				~(g_vol->cluster_size - 1);
+	else if (g_vol->major_ver < 3) {
+		if (volume_size >= 400LL << 20)		/* > 400MiB	*/
+			g_logfile_size = 4 << 20;	/*   -> 4MiB	*/
+		else
+			g_logfile_size = (volume_size / 100) &
+					~(g_vol->cluster_size - 1);
+	} else	{
+		/* 
+		 * FIXME: The $LogFile size is 64 MiB upwards from 12GiB but
+		 * the "200" divider below apparently approximates "100" or
+		 * some other walue as the volume size decreases. For example:
+		 *      Volume size   LogFile size    Ratio
+		 *	  8799808        46048       191.100
+		 *	  8603248        45072       190.877
+		 *	  7341704        38768       189.375
+		 *	  6144828        32784       187.433
+		 *	  4192932        23024       182.111
+		 */
+		if (volume_size >= 12LL << 30)		/* > 12GiB	*/
+			g_logfile_size = 64 << 20;	/*   -> 64MiB	*/
+		else
+			g_logfile_size = (volume_size / 200) &
+					~(g_vol->cluster_size - 1);
+	}
 	j = g_logfile_size / g_vol->cluster_size;
 	while (g_rl_logfile[0].lcn + j >= g_vol->nr_clusters) {
 		/*