mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead...

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / readahead.c

diff --git a/mm/readahead.c b/mm/readahead.c
index 0de2360..1fa0d6f 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -233,14 +233,14 @@ int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
        return 0;
 }
 
+#define MAX_READAHEAD   ((512*4096)/PAGE_CACHE_SIZE)
 /*
  * Given a desired number of PAGE_CACHE_SIZE readahead pages, return a
  * sensible upper limit.
  */
 unsigned long max_sane_readahead(unsigned long nr)
 {
-       return min(nr, (node_page_state(numa_node_id(), NR_INACTIVE_FILE)
-               + node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2);
+       return min(nr, MAX_READAHEAD);
 }
 
 /*