return page;
}
-/*
- * Locate a page of swap in physical memory, reserving swap cache space
- * and reading the disk if it is not already cached.
- * A failure return means that either the page allocation failed or that
- * the swap entry is no longer in use.
- */
-struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
- struct vm_area_struct *vma, unsigned long addr)
+struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
+ struct vm_area_struct *vma, unsigned long addr,
+ bool *new_page_allocated)
{
struct page *found_page, *new_page = NULL;
+ struct address_space *swapper_space = swap_address_space(entry);
int err;
+ *new_page_allocated = false;
do {
/*
* called after lookup_swap_cache() failed, re-calling
* that would confuse statistics.
*/
- found_page = find_get_page(swap_address_space(entry),
- entry.val);
+ found_page = find_get_page(swapper_space, entry.val);
if (found_page)
break;
* Initiate read into locked page and return.
*/
lru_cache_add_anon(new_page);
- swap_readpage(new_page);
+ *new_page_allocated = true;
return new_page;
}
radix_tree_preload_end();
return found_page;
}
+/*
+ * Locate a page of swap in physical memory, reserving swap cache space
+ * and reading the disk if it is not already cached.
+ * A failure return means that either the page allocation failed or that
+ * the swap entry is no longer in use.
+ */
+struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
+ struct vm_area_struct *vma, unsigned long addr)
+{
+ bool page_was_allocated;
+ struct page *retpage = __read_swap_cache_async(entry, gfp_mask,
+ vma, addr, &page_was_allocated);
+
+ if (page_was_allocated)
+ swap_readpage(retpage);
+
+ return retpage;
+}
+
static unsigned long swapin_nr_pages(unsigned long offset)
{
static unsigned long prev_offset;