X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Freadahead.c;h=0f142a40984b1674228e067f491159d42b13f32d;hb=0761be4f5f9efb5f72a5f9771f2ed5845a974c46;hp=57557e2949870c8f4ff56c9347c4c17f7c624586;hpb=a564da3964db3256069190c2ae95069143ac37fb;p=linux-2.6

diff --git a/mm/readahead.c b/mm/readahead.c
index 57557e2949..0f142a4098 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -83,10 +83,10 @@ static unsigned long get_init_ra_size(unsigned long size, unsigned long max)
 {
 	unsigned long newsize = roundup_pow_of_two(size);
 
-	if (newsize <= max / 64)
-		newsize = newsize * newsize;
+	if (newsize <= max / 32)
+		newsize = newsize * 4;
 	else if (newsize <= max / 4)
-		newsize = max / 4;
+		newsize = newsize * 2;
 	else
 		newsize = max;
 	return newsize;
@@ -555,6 +555,7 @@ recheck:
 out:
 	return ra->prev_page + 1;
 }
+EXPORT_SYMBOL_GPL(page_cache_readahead);
 
 /*
  * handle_ra_miss() is called when it is known that a page which should have