Index: b/include/linux/blkdev.h
===================================================================
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1026,6 +1026,6 @@ extern int blk_verify_command(unsigned c
 enum blk_default_limits {
-	BLK_MAX_SEGMENTS	= 128,
+	BLK_MAX_SEGMENTS	= 256,
 	BLK_SAFE_MAX_SECTORS	= 255,
-	BLK_DEF_MAX_SECTORS	= 1024,
+	BLK_DEF_MAX_SECTORS	= 2048,
 	BLK_MAX_SEGMENT_SIZE	= 65536,
 	BLK_SEG_BOUNDARY_MASK	= 0xFFFFFFFFUL,
 };
Index: linux-2.6.32.x86_64/include/scsi/scsi.h
===================================================================
--- linux-2.6.32.x86_64.orig/include/scsi/scsi.h	2010-10-26 21:45:52.000000000 +0300
+++ linux-2.6.32.x86_64/include/scsi/scsi.h	2010-10-29 11:16:35.000000000 +0300
@@ -19,7 +19,7 @@ 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	256
 
 /*
  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
Index: linux-2.6.32.x86_64/drivers/scsi/isci/init.c
===================================================================
--- linux-2.6.32.x86_64/drivers/scsi/isci/init.c
+++ linux-2.6.32.x86_64/drivers/scsi/isci/init.c
@@ -19,7 +19,7 @@
	.can_queue			= ISCI_CAN_QUEUE_VAL,
	.cmd_per_lun			= 1,
	.this_id			= -1,
-	.sg_tablesize			= SG_ALL,
+	.sg_tablesize			= 128,
	.max_sectors			= SCSI_DEFAULT_MAX_SECTORS,
	.use_clustering			= ENABLE_CLUSTERING,
	.eh_device_reset_handler	= sas_eh_device_reset_handler,