[Xen-changelog] Increase the static constant default number of loopback interfaces, nloopbacks,

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User emellor@xxxxxxxxxxxxxxxxxxxxxx
# Node ID 37ad91483bd3dc65475bbe35c15f7c547c3cacea
# Parent  7cbcdccd659dee6283163f8dba34a881dd8729b8
Increase the static constant default number of loopback interfaces, nloopbacks,
to 8.  These interfaces are very cheap, so there's no problem having a few
spare.  Anyone with more than 8 NICs can still use the kernel command line or
the module parameter line to pass a larger limit to this module.

Detail the kernel command line parameter for nloopbacks in the diagnostic in
network-bridge.

Closes bug #381.

Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>

diff -r 7cbcdccd659d -r 37ad91483bd3 
linux-2.6-xen-sparse/drivers/xen/netback/loopback.c
--- a/linux-2.6-xen-sparse/drivers/xen/netback/loopback.c       Tue Nov  8 
13:56:14 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/netback/loopback.c       Tue Nov  8 
14:15:02 2005
@@ -29,7 +29,7 @@
 #include <linux/skbuff.h>
 #include <net/dst.h>
 
-static int nloopbacks = 1;
+static int nloopbacks = 8;
 module_param(nloopbacks, int, 0);
 MODULE_PARM_DESC(nloopbacks, "Number of netback-loopback devices to create");
 
diff -r 7cbcdccd659d -r 37ad91483bd3 tools/examples/network-bridge
--- a/tools/examples/network-bridge     Tue Nov  8 13:56:14 2005
+++ b/tools/examples/network-bridge     Tue Nov  8 14:15:02 2005
@@ -200,7 +200,9 @@
 Link $vdev is missing.
 This may be because you have reached the limit of the number of interfaces
 that the loopback driver supports.  If the loopback driver is a module, you
-may raise this limit by passing it as a parameter (nloopbacks=<N>).
+may raise this limit by passing it as a parameter (nloopbacks=<N>); if the
+driver is compiled statically into the kernel, then you may set the parameter
+using loopback.nloopbacks=<N> on the domain 0 kernel command line.
 " >&2
         exit 1
     fi

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