From a86d83a77cb5d105817063b717653b637dc67bb6 Mon Sep 17 00:00:00 2001
From: Marc Fiuczynski <mef@cs.princeton.edu>
Date: Tue, 18 Nov 2008 22:57:54 +0000
Subject: [PATCH] Minor cleanup:  - added a modules.close()  - print the kexec
 command for the bm.log to both screen and log

Added functionality:
 - Printing the set of modules that have not been unloaded yet.
 - Can list a set of modules that should be explicitly unloaded. Right
   now this has to be done by manually editing this python module.  I
   suppose in the future this should be something that can be obtained
   from a node attribute of some sort
---
 source/steps/ChainBootNode.py | 53 +++++++++++++++++++++++++++++++++--
 1 file changed, 51 insertions(+), 2 deletions(-)

diff --git a/source/steps/ChainBootNode.py b/source/steps/ChainBootNode.py
index 077d42c..0005d79 100644
--- a/source/steps/ChainBootNode.py
+++ b/source/steps/ChainBootNode.py
@@ -260,9 +260,53 @@ def Run( vars, log ):
                         utils.sysexec_noerr( "modprobe -r %s" % parts[0], log )
             except IndexError, e:
                 log.write( "Couldn't parse /proc/modules, continuing.\n" )
+        modules.close()
     except IOError:
         log.write( "Couldn't read /proc/modules, continuing.\n" )
 
+    try:
+	modules=file("/tmp/loadedmodules","r")
+	log.write("BM loaded modules:")
+	for line in modules:
+            	module=string.strip(line)
+		log.write("%s " % module)
+	log.write("\n")
+        modules.close()
+
+	t={}
+	log.write("Not unloading:")
+	modules=file("/proc/modules","r")
+	for line in modules:
+		parts=line.split()
+		name=parts[0].strip()
+		count=parts[2].strip()
+		dep=parts[3].strip()
+		log.write("(%s->%s,%s)" % (name,count,dep))
+		t[name]=(count,dep)
+        modules.close()
+	log.write("\n")
+
+	#removemodules=("ata_generic","sg","libata","scsi_mod")
+        removemodules=()
+	for removemodule in removemodules:
+		entry=t.get(removemodule,None)
+		if entry <> None:
+                    	log.write("Unloading %s driver; sleeping 4 seconds...\n" % removemodule)
+                	utils.sysexec_noerr( "modprobe -r %s" % removemodule, log )
+                    	time.sleep(4)
+			
+	log.write("Remaining modules:")
+	modules=file("/proc/modules","r")
+	for line in modules:
+		parts=line.split()
+		name=parts[0].strip()
+		count=parts[2].strip()
+		dep=parts[3].strip()
+		log.write("(%s->%s,%s)" % (name,count,dep))
+        modules.close()
+	log.write("\n")
+    except IOError:
+        log.write( "Couldn't read /proc/modules, continuing.\n" )
 
     kargs = "root=%s ramdisk_size=8192" % PARTITIONS["mapper-root"]
     if NODE_MODEL_OPTIONS & ModelOptions.SMP:
@@ -281,8 +325,13 @@ def Run( vars, log ):
 
     utils.breakpoint ("Before kexec");
     try:
-        utils.sysexec( 'kexec --force --initrd=/tmp/initrd ' \
-                       '--append="%s" /tmp/kernel' % kargs)
+        #kargs = kargs + " acpi=off noapic nolapic nosmp"
+        #kargs = kargs + " console=ttyS0,115200 earlyprintk=ttyS0"
+        #kexecdebug="--console-serial --serial-baud=115200 --debug"
+        kexecdebug=""
+	kexec='kexec %s --force --initrd=/tmp/initrd --append="%s" /tmp/kernel' % (kexecdebug,kargs)
+        log.write("%s\n"%kexec)
+        utils.sysexec(kexec)
     except BootManagerException, e:
         # if kexec fails, we've shut the machine down to a point where nothing
         # can run usefully anymore (network down, all modules unloaded, file
-- 
2.43.0