Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

[Yinghai Lu]

please apply attached patch to see if insert_resource/request resource
works on your conf

YH
Index: linux-2.6/kernel/resource.c
===================================================================
--- linux-2.6.orig/kernel/resource.c
+++ linux-2.6/kernel/resource.c
@@ -201,6 +201,7 @@ int request_resource(struct resource *ro
 	write_lock(&resource_lock);
 	conflict = __request_resource(root, new);
 	write_unlock(&resource_lock);
+	printk(KERN_DEBUG "request_resource: root: (%s) [%llx, %llx], new: (%s) [%llx, %llx] conflict %d\n", root->name, root->start, root->end, new->name, new->start, new->end, !!conflict);
 	return conflict ? -EBUSY : 0;
 }
 
@@ -382,16 +383,20 @@ int insert_resource(struct resource *par
 
 	write_lock(&resource_lock);
 
+	printk(KERN_DEBUG "insert_resource: parent: (%s) [%llx, %llx], new: (%s) [%llx, %llx]\n", parent->name, parent->start, parent->end, new->name, new->start, new->end);
 	for (;; parent = first) {
 	 	result = 0;
 		first = __request_resource(parent, new);
-		if (!first)
+		if (!first) {
+			printk(KERN_DEBUG "    insert_resource: good with request direct parent: (%s) [%llx, %llx], new: (%s) [%llx, %llx]\n", parent->name, parent->start, parent->end, new->name, new->start, new->end);
 			goto out;
+		}
 
 		result = -EBUSY;
 		if (first == parent)
 			goto out;
 
+		printk(KERN_DEBUG "  insert_resource: first: (%s) [%llx, %llx], new: (%s) [%llx, %llx]\n", first->name, first->start, first->end, new->name, new->start, new->end);
 		if ((first->start > new->start) || (first->end < new->end))
 			break;
 		if ((first->start == new->start) && (first->end == new->end))
@@ -413,10 +418,13 @@ int insert_resource(struct resource *par
 	new->parent = parent;
 	new->sibling = next->sibling;
 	new->child = first;
+	printk(KERN_DEBUG "  insert_resource: direct parent: (%s) [%llx, %llx], new: (%s) [%llx, %llx]\n", parent->name, parent->start, parent->end, new->name, new->start, new->end);
 
 	next->sibling = NULL;
-	for (next = first; next; next = next->sibling)
+	for (next = first; next; next = next->sibling) {
 		next->parent = new;
+		printk(KERN_DEBUG "    insert_resource: child: (%s) [%llx, %llx], new: (%s) [%llx, %llx]\n", next->name, next->start, next->end, new->name, new->start, new->end);
+	}
 
 	if (parent->child == first) {
 		parent->child = new;