Function __isolate_lru_page() is called by isolate_lru_pages() or
isolate_migratepages_range(). For both cases, the PG_lru flag for
the target page frame has been checked. So we needn't check that
again in function __isolate_lru_page() and just remove the check
in function __isolate_lru_page().
Signed-off-by: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 4 ----
1 files changed, 0 insertions(+), 4 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6615763..77d5704 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -940,10 +940,6 @@ int __isolate_lru_page(struct page *page, isolate_mode_t mode)
{
int ret = -EINVAL;
- /* Only take pages on the LRU. */
- if (!PageLRU(page))
- return ret;
-
/* Do not give back unevictable pages for compaction */
if (PageUnevictable(page))
return ret;
--
1.7.5.4
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