This makes pinned tmpfs pages bail out early in the process of pageSorry, this patch is flawed, since tmpfs page cache takes an extra page
migration, like what pinned anonymous pages do.
Signed-off-by: Xu Yu <xuyu@xxxxxxxxxxxxxxxxx>
mm/compaction.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index e04f4476e68e..78c3b992a1c9 100644
@@ -964,11 +964,11 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
- * Migration will fail if an anonymous page is pinned in memory,
- * so avoid taking lru_lock and isolating it unnecessarily in an
- * admittedly racy check.
+ * Migration will fail if an anonymous or tmpfs page is pinned
+ * in memory, so avoid taking lru_lock and isolating it
+ * unnecessarily in an admittedly racy check.
- if (!page_mapping(page) &&
+ if (!page_is_file_lru(page) &&
page_count(page) > page_mapcount(page))