* Put the PCI module probing in an Upstart task. We now have

more-or-less "asynchronous" booting: the login prompt appears almost
  immediately, before the hardware and the network are started.

svn path=/nixu/trunk/; revision=7082

test/boot-environment.nix

@@ -87,9 +87,14 @@ rec {
         inherit (pkgs) sysklogd;
       })
 
+      # Hardware scan; loads modules for PCI devices.
+      (import ./upstart-jobs/hardware-scan.nix {
+        inherit (pkgs) kernel module_init_tools;
+      })
+      
       # Network interfaces.
       (import ./upstart-jobs/network-interfaces.nix {
-        inherit (pkgs) nettools kernel;
+        inherit (pkgs) nettools kernel module_init_tools;
       })
       
       # DHCP client.
@@ -121,7 +126,7 @@ rec {
   # everything else to bring up the system.
   bootStage2 = import ./boot-stage-2.nix {
     inherit (pkgs) genericSubstituter coreutils findutils
-      utillinux kernel udev module_init_tools
+      utillinux kernel udev
       upstart;
     inherit upstartJobs;
     shell = pkgs.bash + "/bin/sh";
@@ -140,6 +145,7 @@ rec {
       pkgs.gzip
       pkgs.iputils
       pkgs.less
+      pkgs.module_init_tools
       pkgs.nano
       pkgs.netcat
       pkgs.nettools

test/boot-stage-2-init.sh

@@ -74,14 +74,6 @@ echo "*.* /dev/tty10" > /etc/syslog.conf
 echo "syslog 514/udp" > /etc/services # required, even if we don't use it
 
 
-# Try to load modules for all PCI devices.
-for i in /sys/bus/pci/devices/*/modalias; do
-    echo "Trying to load a module for $(basename $(dirname $i))..."
-    modprobe $(cat $i)
-    echo ""
-done
-
-
 # login/su absolutely need this.
 test -e /etc/login.defs || touch /etc/login.defs 
 

test/boot-stage-2.nix

@@ -1,6 +1,5 @@
 { genericSubstituter, shell, coreutils, findutils
-, utillinux, kernel, udev
-, module_init_tools, upstart
+, utillinux, kernel, udev, upstart
 , path ? []
 
 , # Whether the root device is root only.  If so, we'll mount a
@@ -20,7 +19,6 @@ genericSubstituter {
     findutils
     utillinux
     udev
-    module_init_tools
     upstart
   ];
   extraPath = path;

test/upstart-jobs/dhclient.nix

@@ -6,7 +6,7 @@
   job = "
 description \"DHCP client\"
 
-start on network-interfaces
+start on network-interfaces/started
 stop on network-interfaces/stop
 
 script

test/upstart-jobs/hardware-scan.nix

@@ -0,0 +1,23 @@
+# !!! Don't like it that I have to pass the kernel here.
+{kernel, module_init_tools}:
+
+{
+  name = "hardware-scan";
+  
+  job = "
+start on startup
+
+script
+    export MODULE_DIR=${kernel}/lib/modules/
+    
+    # Try to load modules for all PCI devices.
+    for i in /sys/bus/pci/devices/*/modalias; do
+        echo \"Trying to load a module for $(basename $(dirname $i))...\"
+        ${module_init_tools}/sbin/modprobe $(cat $i) || true
+        echo \"\"
+    done
+end script
+
+  ";
+
+}

test/upstart-jobs/network-interfaces.nix

@@ -1,17 +1,17 @@
 # !!! Don't like it that I have to pass the kernel here.
-{nettools, kernel}:
+{nettools, kernel, module_init_tools}:
 
 {
   name = "network-interfaces";
   
   job = "
-start on startup
+start on hardware-scan
 stop on shutdown
 
 start script
     export MODULE_DIR=${kernel}/lib/modules/
 
-    modprobe af_packet
+    ${module_init_tools}/sbin/modprobe af_packet
     
     for i in $(cd /sys/class/net && ls -d *); do
         echo \"Bringing up network device $i...\"