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Cleaner debug messages for fault handling.

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This commit is contained in:
Bahadir Balban
2008-08-29 13:07:28 +03:00
parent 63e9d059c8
commit 895651b778
1 changed files with 14 additions and 6 deletions
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20
tasks/mm0/src/fault.c
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@@ -74,6 +74,10 @@ struct vm_object *vma_drop_link(struct vm_obj_link *shadower_link,
/*
* Reduce object's shadow count since its not shadowed
* by this shadower anymore.
*
* FIXME: Is every object drop because of shadows???
* What about exiting tasks?
*
*/
dropped->shadows--;
@@ -258,14 +262,14 @@ int vma_drop_merge_delete(struct vm_obj_link *shadow_link,
if (vm_object_is_subset(shadow_link->obj, orig_link->obj)) {
struct vm_object *dropped;
printf("VM OBJECT is a subset of its shadow.\nShadow:\n");
dprintf("VM OBJECT is a subset of its shadow.\nShadow:\n");
vm_object_print(shadow_link->obj);
printf("Original:\n");
dprintf("Original:\n");
vm_object_print(orig_link->obj);
/* We can drop the link to original object */
dropped = vma_drop_link(shadow_link, orig_link);
printf("Dropped link to object:\n");
dprintf("Dropped link to object:\n");
vm_object_print(dropped);
orig_link = 0;
@@ -281,7 +285,7 @@ int vma_drop_merge_delete(struct vm_obj_link *shadow_link,
/* If the object has no links left, we can delete it */
if (dropped->nlinks == 0) {
BUG_ON(dropped->shadows != 0);
printf("Deleting object:\n");
dprintf("Deleting object:\n");
vm_object_print(dropped);
vm_object_delete(dropped);
}
@@ -292,7 +296,7 @@ int vma_drop_merge_delete(struct vm_obj_link *shadow_link,
*/
if (dropped->nlinks == 1 &&
dropped->shadows == 1) {
printf("Merging object:\n");
dprintf("Merging object:\n");
vm_object_print(dropped);
vma_merge_object(dropped);
}
@@ -340,7 +344,6 @@ struct page *copy_on_write(struct fault_data *fault)
if (!(vmo_link->obj->flags & VM_WRITE)) {
if (!(shadow_link = vma_create_shadow()))
return PTR_ERR(-ENOMEM);
dprintf("%s: Created a shadow.\n", __TASKNAME__);
/* Initialise the shadow */
shadow = shadow_link->obj;
@@ -349,6 +352,11 @@ struct page *copy_on_write(struct fault_data *fault)
shadow->pager = &swap_pager;
vmo_link->obj->shadows++;
dprintf("%s: Created a shadow:\n", __TASKNAME__);
vm_object_object(shadow);
dprintf("%s: Original object:\n", __TASKNAME__);
vm_object_print(shadow->orig_obj);
/*
* Add the shadow in front of the original:
*