[SCSI] iscsi: lower queue depth
From Wang Zhenyu:
High queue depth was a problem for some targets so make queue_depth adjustable
From Mike Christie
Make default queue_depth a little lower
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index d23ae68..855f2df 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -71,7 +71,8 @@
#define ISCSI_MGMT_CMDS_MAX 32 /* must be power of 2 */
#define ISCSI_MGMT_ITT_OFFSET 0xa00
#define ISCSI_SG_TABLESIZE SG_ALL
-#define ISCSI_CMD_PER_LUN 128
+#define ISCSI_DEF_CMD_PER_LUN 32
+#define ISCSI_MAX_CMD_PER_LUN 128
#define ISCSI_TCP_MAX_CMD_LEN 16
#define ITT_MASK (0xfff)