Shrink icache more aggressively - if we free the dentries,

go ahead and free the inodes too, don't try to age them any
more (the aging has been done on a dentry level).

mm/vmscan.c

@@ -578,7 +578,9 @@ static int shrink_caches(zone_t * classzone, int priority, unsigned int gfp_mask
 		return 0;
 
 	shrink_dcache_memory(priority, gfp_mask);
-	shrink_icache_memory(priority, gfp_mask);
+
+	/* After shrinking the dcache, get rid of unused inodes too .. */
+	shrink_icache_memory(1, gfp_mask);
 #ifdef CONFIG_QUOTA
 	shrink_dqcache_memory(DEF_PRIORITY, gfp_mask);
 #endif