diff options
Diffstat (limited to 'vm/vm_page.c')
| -rw-r--r-- | vm/vm_page.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/vm/vm_page.c b/vm/vm_page.c index 00674499..950d04a1 100644 --- a/vm/vm_page.c +++ b/vm/vm_page.c @@ -167,6 +167,10 @@ vm_page_init(struct vm_page *page, unsigned short zone_index, phys_addr_t pa) page->zone_index = zone_index; page->order = VM_PAGE_ORDER_UNLISTED; page->phys_addr = pa; + + page->nr_refs = 0; + + page->object = NULL; } void @@ -740,6 +744,7 @@ vm_page_setup(void) SHELL_REGISTER_CMDS(vm_page_shell_cmds); } +/* TODO Rename to avoid confusion with "managed pages" */ void __init vm_page_manage(struct vm_page *page) { @@ -767,6 +772,22 @@ vm_page_lookup(phys_addr_t pa) return NULL; } +static bool +vm_page_block_referenced(const struct vm_page *page, unsigned int order) +{ + unsigned int i, nr_pages; + + nr_pages = 1 << order; + + for (i = 0; i < nr_pages; i++) { + if (vm_page_referenced(&page[i])) { + return true; + } + } + + return false; +} + struct vm_page * vm_page_alloc(unsigned int order, unsigned int selector, unsigned short type) { @@ -777,6 +798,7 @@ vm_page_alloc(unsigned int order, unsigned int selector, unsigned short type) page = vm_page_zone_alloc(&vm_page_zones[i], order, type); if (page != NULL) { + assert(!vm_page_block_referenced(page, order)); return page; } } @@ -788,6 +810,7 @@ void vm_page_free(struct vm_page *page, unsigned int order) { assert(page->zone_index < ARRAY_SIZE(vm_page_zones)); + assert(!vm_page_block_referenced(page, order)); vm_page_zone_free(&vm_page_zones[page->zone_index], page, order); } |