--- a/block/blk-settings.c	2013-02-06 12:40:44.000000000 -0500
+++ b/block/blk-settings.c	2013-02-06 12:55:28.000000000 -0500
@@ -19,6 +19,12 @@
 
 unsigned long blk_max_pfn;
 
+int default_max_sectors = BLK_DEF_MAX_SECTORS;
+module_param(default_max_sectors, int, 0);
+
+int default_max_segments = BLK_MAX_SEGMENTS;
+module_param(default_max_segments, int, 0);
+
 /**
  * blk_queue_prep_rq - set a prepare_request function for queue
  * @q:		queue
@@ -108,7 +114,7 @@
  */
 void blk_set_default_limits(struct queue_limits *lim)
 {
-	lim->max_segments = BLK_MAX_SEGMENTS;
+	lim->max_segments = default_max_segments;
 	lim->max_integrity_segments = 0;
 	lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
 	lim->max_segment_size = BLK_MAX_SEGMENT_SIZE;
@@ -255,7 +261,7 @@
 
 	limits->max_hw_sectors = max_hw_sectors;
 	limits->max_sectors = min_t(unsigned int, max_hw_sectors,
-				    BLK_DEF_MAX_SECTORS);
+				    default_max_sectors);
 }
 EXPORT_SYMBOL(blk_limits_max_hw_sectors);
 
--- a/drivers/scsi/Kconfig	2013-02-07 09:25:49.000000000 -0500
+++ b/drivers/scsi/Kconfig	2013-02-07 09:30:15.000000000 -0500
@@ -245,6 +245,15 @@ config SCSI_SCAN_ASYNC
	  there should be no noticeable performance impact as long as you have
	  logging turned off.
 
+config SCSI_MAX_SG_SEGMENTS
+	int "Maximum SCSI scatter gather segment size"
+	range 32 256 
+	default "128"
+	depends on SCSI
+	help
+	  Control the maximum limit for scatter gather buffers for the
+	  SCSI device.
+
 config SCSI_SCAN_ASYNC
 	bool "Asynchronous SCSI scanning"
 	depends on SCSI
--- a/include/scsi/scsi.h	2013-02-07 09:55:02.000000000 -0500
+++ b/include/scsi/scsi.h	2013-02-07 09:55:20.000000000 -0500
@@ -20,7 +20,7 @@ struct scsi_cmnd;
  * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
  * minimum value is 32
  */
-#define SCSI_MAX_SG_SEGMENTS	128
+#define SCSI_MAX_SG_SEGMENTS	CONFIG_SCSI_MAX_SG_SEGMENTS
 
 /*
  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
--- a/drivers/scsi/isci/init.c	2013-02-08 10:13:00.000000000 -0500
+++ b/drivers/scsi/isci/init.c	2013-02-08 10:15:04.000000000 -0500
@@ -118,6 +118,10 @@ unsigned char phy_gen = 3;
 module_param(phy_gen, byte, 0);
 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
 
+u16 sg_table_size = SG_ALL;
+module_param(sg_table_size, ushort, 0);
+MODULE_PARM_DESC(sg_table_size, "Size in KB of scatter gather table");
+
 unsigned char max_concurr_spinup = 1;
 module_param(max_concurr_spinup, byte, 0);
 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
@@ -155,7 +159,6 @@ static struct scsi_host_template isci_sh
 	.can_queue			= ISCI_CAN_QUEUE_VAL,
 	.cmd_per_lun			= 1,
 	.this_id			= -1,
-	.sg_tablesize			= SG_ALL,
 	.max_sectors			= SCSI_DEFAULT_MAX_SECTORS,
 	.use_clustering			= ENABLE_CLUSTERING,
 	.eh_device_reset_handler	= sas_eh_device_reset_handler,
@@ -407,6 +410,7 @@ static struct isci_host *isci_host_alloc
 	isci_host->pdev = pdev;
 	isci_host->id = id;
 
+	isci_sht.sg_tablesize = sg_table_size;
 	shost = scsi_host_alloc(&isci_sht, sizeof(void *));
 	if (!shost)
 		return NULL;
--- a/drivers/message/fusion/Kconfig	2013-02-08 10:21:25.000000000 -0500
+++ b/drivers/message/fusion/Kconfig	2013-02-08 10:22:37.000000000 -0500
@@ -61,9 +61,9 @@
 	  LSISAS1078
 
 config FUSION_MAX_SGE
-	int "Maximum number of scatter gather entries for SAS and SPI (16 - 128)"
-	default "128"
-	range 16 128
+	int "Maximum number of scatter gather entries for SAS and SPI (16 - 256)"
+	default "256"
+	range 16 256 
 	help
 	  This option allows you to specify the maximum number of scatter-
 	  gather entries per I/O. The driver default is 128, which matches
--- a/drivers/message/fusion/mptbase.h	2013-02-08 10:32:45.000000000 -0500
+++ b/drivers/message/fusion/mptbase.h	2013-02-08 10:32:55.000000000 -0500
@@ -168,8 +168,8 @@
 #ifdef  CONFIG_FUSION_MAX_SGE
 #if     CONFIG_FUSION_MAX_SGE  < 16
 #define MPT_SCSI_SG_DEPTH	16
-#elif   CONFIG_FUSION_MAX_SGE  > 128
-#define MPT_SCSI_SG_DEPTH	128
+#elif   CONFIG_FUSION_MAX_SGE  > 256
+#define MPT_SCSI_SG_DEPTH	256
 #else
 #define MPT_SCSI_SG_DEPTH	CONFIG_FUSION_MAX_SGE
 #endif