mm: fix 100% CPU kswapd busyloop on unreclaimable nodes

[mirror_ubuntu-artful-kernel.git] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 266efaeaa370a46debcc5b6b614a72e33833ac4d..e5a0e0ec2177bc661e785021a604efe9bd691a44 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -80,6 +80,12 @@ static inline void set_page_refcounted(struct page *page)
 
 extern unsigned long highest_memmap_pfn;
 
+/*
+ * Maximum number of reclaim retries without progress before the OOM
+ * killer is consider the only way forward.
+ */
+#define MAX_RECLAIM_RETRIES 16
+
 /*
  * in mm/vmscan.c:
  */