summaryrefslogtreecommitdiff
path: root/mm/migrate.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 3bbaf5d230b0..27ed22579fd9 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -736,7 +736,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
if (PageWriteback(page)) {
/*
- * Only in the case of a full syncronous migration is it
+ * Only in the case of a full synchronous migration is it
* necessary to wait for PageWriteback. In the async case,
* the retry loop is too short and in the sync-light case,
* the overhead of stalling is too much
@@ -973,19 +973,23 @@ out:
}
/*
- * migrate_pages
+ * migrate_pages - migrate the pages specified in a list, to the free pages
+ * supplied as the target for the page migration
*
- * The function takes one list of pages to migrate and a function
- * that determines from the page to be migrated and the private data
- * the target of the move and allocates the page.
+ * @from: The list of pages to be migrated.
+ * @get_new_page: The function used to allocate free pages to be used
+ * as the target of the page migration.
+ * @private: Private data to be passed on to get_new_page()
+ * @mode: The migration mode that specifies the constraints for
+ * page migration, if any.
+ * @reason: The reason for page migration.
*
- * The function returns after 10 attempts or if no pages
- * are movable anymore because to has become empty
- * or no retryable pages exist anymore.
- * Caller should call putback_lru_pages to return pages to the LRU
+ * The function returns after 10 attempts or if no pages are movable any more
+ * because the list has become empty or no retryable pages exist any more.
+ * The caller should call putback_lru_pages() to return pages to the LRU
* or free list only if ret != 0.
*
- * Return: Number of pages not migrated or error code.
+ * Returns the number of pages that were not migrated, or an error code.
*/
int migrate_pages(struct list_head *from, new_page_t get_new_page,
unsigned long private, enum migrate_mode mode, int reason)