patch-2.1.88 linux/fs/buffer.c

• Lines: 19
• Date: Thu Feb 19 01:09:47 1998
• Orig file: v2.1.87/linux/fs/buffer.c
• Orig date: Thu Jan 15 21:01:04 1998

diff -u --recursive --new-file v2.1.87/linux/fs/buffer.c linux/fs/buffer.c
@@ -52,10 +52,14 @@
 #define NR_RESERVED (2*MAX_BUF_PER_PAGE)
 #define MAX_UNUSED_BUFFERS NR_RESERVED+20 /* don't ever have more than this 
 					     number of unused buffer heads */
-#define HASH_PAGES         4  /* number of pages to use for the hash table */
-#define HASH_PAGES_ORDER   2
-#define NR_HASH (HASH_PAGES*PAGE_SIZE/sizeof(struct buffer_head *))
-#define HASH_MASK (NR_HASH-1)
+
+/*
+ * How large a hash table do we need?
+ */
+#define HASH_PAGES_ORDER	4
+#define HASH_PAGES		(1UL << HASH_PAGES_ORDER)
+#define NR_HASH			(HASH_PAGES*PAGE_SIZE/sizeof(struct buffer_head *))
+#define HASH_MASK		(NR_HASH-1)
 
 static int grow_buffers(int pri, int size);