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Adds reading pages into page-cache in an ordered manner.

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Added reading pages from the page cache into user buffer for sys_read.
Increases stack sizes to 4 pages.
Updated README to include more details about multi-pager environments.
This commit is contained in:
Bahadir Balban
2008-02-27 01:17:36 +00:00
parent 2a5cdf80b5
commit 0c9b42121a
9 changed files with 144 additions and 76 deletions
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16
tasks/mm0/src/fault.c
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@@ -130,7 +130,7 @@ int do_file_page(struct fault_data *fault)
/* Add the page to it's owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
list_add(&page->list, &page->owner->page_cache_list);
insert_page_olist(page, page->owner);
spin_unlock(&page->lock);
//printf("%s: Mapped new page @ 0x%x to task: %d\n", __TASKNAME__,
// fault->address, fault->task->tid);
@@ -184,7 +184,7 @@ int do_file_page(struct fault_data *fault)
/* Add the page to it's owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
list_add(&page->list, &page->owner->page_cache_list);
insert_page_olist(page, page->owner);
spin_unlock(&page->lock);
/*
@@ -244,7 +244,7 @@ int do_file_page(struct fault_data *fault)
/* Add the page to it's owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
list_add(&page->list, &page->owner->page_cache_list);
insert_page_olist(page, page->owner);
spin_unlock(&page->lock);
} else
BUG();
@@ -333,7 +333,7 @@ int do_anon_page(struct fault_data *fault)
/* Add the page to it's owner's list of in-memory pages */
BUG_ON(!list_empty(&page->list));
list_add(&page->list, &page->owner->page_cache_list);
insert_page_olist(page, page->owner);
/* The offset of this page in its owner file */
page->f_offset = __pfn(fault->address)
@@ -391,15 +391,15 @@ int do_page_fault(struct fault_data *fault)
/* vma flags show no access */
if (vma_flags & VM_NONE) {
printf("Illegal access, tid: %d, address: %x\n",
fault->task->tid, fault->address);
printf("Illegal access, tid: %d, address: 0x%x, PC @ 0x%x,\n",
fault->task->tid, fault->address, fault->kdata->faulty_pc);
BUG();
}
/* The access reason is not included in the vma's listed flags */
if (!(reason & vma_flags)) {
printf("Illegal access, tid: %d, address: %x\n",
fault->task->tid, fault->address);
printf("Illegal access, tid: %d, address: 0x%x, PC @ 0x%x\n",
fault->task->tid, fault->address, fault->kdata->faulty_pc);
BUG();
}