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-rw-r--r--mm/compaction.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 32a88b49f973..3d11c209614a 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1331,16 +1331,14 @@ static enum compact_result __compact_finished(struct compact_control *cc)
if (is_via_compact_memory(cc->order))
return COMPACT_CONTINUE;
- if (cc->finishing_block) {
- /*
- * We have finished the pageblock, but better check again that
- * we really succeeded.
- */
- if (IS_ALIGNED(cc->migrate_pfn, pageblock_nr_pages))
- cc->finishing_block = false;
- else
- return COMPACT_CONTINUE;
- }
+ /*
+ * Always finish scanning a pageblock to reduce the possibility of
+ * fallbacks in the future. This is particularly important when
+ * migration source is unmovable/reclaimable but it's not worth
+ * special casing.
+ */
+ if (!IS_ALIGNED(cc->migrate_pfn, pageblock_nr_pages))
+ return COMPACT_CONTINUE;
/* Direct compactor: Is a suitable page free? */
for (order = cc->order; order < MAX_ORDER; order++) {
@@ -1382,7 +1380,6 @@ static enum compact_result __compact_finished(struct compact_control *cc)
return COMPACT_SUCCESS;
}
- cc->finishing_block = true;
return COMPACT_CONTINUE;
}
}