svn commit: r249070 - in head: share/man/man4 sys/dev/e1000

[Sean Bruno]

Author: sbruno
Date: Wed Apr  3 21:55:19 2013
New Revision: 249070
URL: http://svnweb.freebsd.org/changeset/base/249070

Log:
  Update man page for igb(4) with a little bit of information about
  hw.igb.num_queues for those so inclined.
  
  PR:		kern/177384
  Submitted by:	hiren.panchasara at gmail.com
  Reviewed by:	sbruno@
  Approved by:	jfv@
  Obtained from:	Yahoo! Inc.
  MFC after:	2 weeks

Modified:
  head/share/man/man4/igb.4
  head/sys/dev/e1000/if_igb.c

Modified: head/share/man/man4/igb.4
==============================================================================
--- head/share/man/man4/igb.4	Wed Apr  3 21:34:35 2013	(r249069)
+++ head/share/man/man4/igb.4	Wed Apr  3 21:55:19 2013	(r249070)
@@ -31,7 +31,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd May 12, 2012
+.Dd March 25, 2013
 .Dt IGB 4
 .Os
 .Sh NAME
@@ -160,6 +160,11 @@ The minimum is 80, and the maximum is 40
 .It Va hw.igb.enable_aim
 If set to 1, enable Adaptive Interrupt Moderation.
 The default is to enable Adaptive Interrupt Moderation.
+.It Va hw.igb.num_queues
+Numer of queues used for data transfer.
+If set to 0, number of queues will be configured
+automatically based on number of CPUs and max
+supported MSI-X messages on the device.
 .It Va kern.ipc.nmbclusters
 The maximum number of mbuf clusters allowed.
 If the system has more than one igb card or jumbo frames are

Modified: head/sys/dev/e1000/if_igb.c
==============================================================================
--- head/sys/dev/e1000/if_igb.c	Wed Apr  3 21:34:35 2013	(r249069)
+++ head/sys/dev/e1000/if_igb.c	Wed Apr  3 21:55:19 2013	(r249070)
@@ -375,7 +375,8 @@ SYSCTL_INT(_hw_igb, OID_AUTO, header_spl
 
 /*
 ** This will autoconfigure based on
-** the number of CPUs if left at 0.
+** the number of CPUs and max supported MSI-X messages
+** if left at 0.
 */
 static int igb_num_queues = 0;
 TUNABLE_INT("hw.igb.num_queues", &igb_num_queues);