Index: 2.6.11/drivers/block/genhd.c
===================================================================
--- 2.6.11.orig/drivers/block/genhd.c	2005-03-02 01:38:08.000000000 -0600
+++ 2.6.11/drivers/block/genhd.c	2005-04-15 11:35:40.763715300 -0500
@@ -31,6 +31,8 @@
 	char name[16];
 } *major_names[MAX_PROBE_HASH];
 
+LIST_HEAD(gendisks);
+
 /* index in the above - for now: assume no multimajor ranges */
 static inline int major_to_index(int major)
 {
@@ -589,6 +591,7 @@
 		kobj_set_kset_s(disk,block_subsys);
 		kobject_init(&disk->kobj);
 		rand_initialize_disk(disk);
+		list_add_tail(&disk->gendisks, &gendisks);
 	}
 	return disk;
 }
Index: 2.6.11/drivers/block/ll_rw_blk.c
===================================================================
--- 2.6.11.orig/drivers/block/ll_rw_blk.c	2005-03-02 01:37:48.000000000 -0600
+++ 2.6.11/drivers/block/ll_rw_blk.c	2005-04-15 11:35:40.765716044 -0500
@@ -28,6 +28,7 @@
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/writeback.h>
+#include <linux/genetic.h>
 
 /*
  * for max sense size
@@ -2140,6 +2141,99 @@
 	__elv_add_request(q, req, ELEVATOR_INSERT_SORT, 0);
 }
  
+#ifdef CONFIG_GENETIC_IOSCHED_AS
+extern struct list_head gendisks;
+
+void disk_stats_snapshot(phenotype_t * pt)
+{
+	struct list_head * d;
+	struct gendisk *disk;
+	struct disk_stats_snapshot * ss = (struct disk_stats_snapshot *)pt->child_ranking[0]->stats_snapshot;
+    
+	memset(ss, 0, sizeof(struct disk_stats_snapshot));
+
+	list_for_each(d, &gendisks) {
+	    disk = list_entry(d, struct gendisk, gendisks);
+
+	    disk_round_stats(disk);
+
+	    ss->reads += disk_stat_read(disk, reads);
+	    ss->writes += disk_stat_read(disk, writes);
+	    ss->read_sectors += disk_stat_read(disk, read_sectors);
+	    ss->write_sectors += disk_stat_read(disk, write_sectors);
+	    ss->time_in_queue += disk_stat_read(disk, time_in_queue);
+	}
+}
+
+unsigned long disk_num_ops_calc_fitness(genetic_child_t * child)
+{
+	struct list_head * d;
+	struct gendisk *disk;
+	struct disk_stats_snapshot * ss = (struct disk_stats_snapshot *)child->stats_snapshot;
+	unsigned long reads = 0;
+	unsigned long writes = 0;
+    
+	list_for_each(d, &gendisks) {
+	    disk = list_entry(d, struct gendisk, gendisks);
+
+	    disk_round_stats(disk);
+	    
+	    reads += disk_stat_read(disk, reads);
+	    writes += disk_stat_read(disk, writes);
+	}
+
+	reads -= ss->reads;
+	writes -= ss->writes;
+	    
+	return reads + writes;
+}
+
+unsigned long disk_throughput_calc_fitness(genetic_child_t * child)
+{
+	struct list_head * d;
+	struct gendisk *disk;
+	struct disk_stats_snapshot * ss = (struct disk_stats_snapshot *)child->stats_snapshot;
+	unsigned long read_sectors = 0;
+	unsigned long write_sectors = 0;
+    
+	list_for_each(d, &gendisks) {
+	    disk = list_entry(d, struct gendisk, gendisks);
+
+	    disk_round_stats(disk);
+	    
+	    read_sectors += disk_stat_read(disk, read_sectors);
+	    write_sectors += disk_stat_read(disk, write_sectors);
+	}
+
+	read_sectors -= ss->read_sectors;
+	write_sectors -= ss->write_sectors;
+
+	return read_sectors + write_sectors;
+}
+
+unsigned long disk_latency_calc_fitness(genetic_child_t * child)
+{
+	struct list_head * d;
+	struct gendisk *disk;
+	struct disk_stats_snapshot * ss = (struct disk_stats_snapshot *)child->stats_snapshot;
+	unsigned long time_in_queue = 0;
+    
+	list_for_each(d, &gendisks) {
+	    disk = list_entry(d, struct gendisk, gendisks);
+
+	    disk_round_stats(disk);
+	    
+	    time_in_queue += disk_stat_read(disk, time_in_queue);
+	}
+
+	time_in_queue = -(time_in_queue - ss->time_in_queue);
+	    
+	return time_in_queue;
+}
+
+
+#endif /* GENETIC_IOSCHED_AS */
+
 /*
  * disk_round_stats()	- Round off the performance stats on a struct
  * disk_stats.
@@ -2162,7 +2256,6 @@
 	__disk_stat_add(disk, time_in_queue,
 			disk->in_flight * (now - disk->stamp));
 	disk->stamp = now;
-
 	if (disk->in_flight)
 		__disk_stat_add(disk, io_ticks, (now - disk->stamp_idle));
 	disk->stamp_idle = now;
Index: 2.6.11/include/linux/genhd.h
===================================================================
--- 2.6.11.orig/include/linux/genhd.h	2005-03-02 01:37:49.000000000 -0600
+++ 2.6.11/include/linux/genhd.h	2005-04-15 11:35:40.766716416 -0500
@@ -121,6 +121,7 @@
 	atomic_t sync_io;		/* RAID */
 	unsigned long stamp, stamp_idle;
 	int in_flight;
+	struct list_head gendisks;
 #ifdef	CONFIG_SMP
 	struct disk_stats *dkstats;
 #else
Index: 2.6.11/include/linux/blkdev.h
===================================================================
--- 2.6.11.orig/include/linux/blkdev.h	2005-03-02 01:37:50.000000000 -0600
+++ 2.6.11/include/linux/blkdev.h	2005-04-15 11:35:40.767716788 -0500
@@ -724,5 +724,16 @@
 #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
 	MODULE_ALIAS("block-major-" __stringify(major) "-*")
 
+#ifdef CONFIG_GENETIC_IOSCHED_AS
+
+struct disk_stats_snapshot
+{
+	unsigned long reads;
+	unsigned long writes;
+	unsigned long read_sectors;
+	unsigned long write_sectors;
+	unsigned long time_in_queue;	
+};
+#endif /* CONFIG_GENETIC_IOSCHED_AS */
 
 #endif