[IPV4]: Use the fancy alloc_large_system_hash() function for route hash table

- rt hash table allocated using alloc_large_system_hash() function.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index daf82f8..9fcbb1b 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -71,6 +71,7 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/bootmem.h>
 #include <linux/string.h>
 #include <linux/socket.h>
 #include <linux/sockios.h>
@@ -3103,12 +3104,14 @@ __setup("rhash_entries=", set_rhash_entries);
 
 int __init ip_rt_init(void)
 {
-       int order, goal, rc = 0;
+       int rc = 0;
 
        rt_hash_rnd = (int) ((num_physpages ^ (num_physpages>>8)) ^
                             (jiffies ^ (jiffies >> 7)));
 
 #ifdef CONFIG_NET_CLS_ROUTE
+       {
+       int order;
        for (order = 0;
             (PAGE_SIZE << order) < 256 * sizeof(struct ip_rt_acct) * NR_CPUS; order++)
                /* NOTHING */;
@@ -3116,6 +3119,7 @@ int __init ip_rt_init(void)
        if (!ip_rt_acct)
                panic("IP: failed to allocate ip_rt_acct\n");
        memset(ip_rt_acct, 0, PAGE_SIZE << order);
+       }
 #endif
 
        ipv4_dst_ops.kmem_cachep = kmem_cache_create("ip_dst_cache",
@@ -3126,32 +3130,17 @@ int __init ip_rt_init(void)
        if (!ipv4_dst_ops.kmem_cachep)
                panic("IP: failed to allocate ip_dst_cache\n");
 
-       goal = num_physpages >> (26 - PAGE_SHIFT);
-       if (rhash_entries)
-               goal = (rhash_entries * sizeof(struct rt_hash_bucket)) >> PAGE_SHIFT;
-       for (order = 0; (1UL << order) < goal; order++)
-               /* NOTHING */;
-
-       do {
-               rt_hash_mask = (1UL << order) * PAGE_SIZE /
-                       sizeof(struct rt_hash_bucket);
-               while (rt_hash_mask & (rt_hash_mask - 1))
-                       rt_hash_mask--;
-               rt_hash_table = (struct rt_hash_bucket *)
-                       __get_free_pages(GFP_ATOMIC, order);
-       } while (rt_hash_table == NULL && --order > 0);
-
-       if (!rt_hash_table)
-               panic("Failed to allocate IP route cache hash table\n");
-
-       printk(KERN_INFO "IP: routing cache hash table of %u buckets, %ldKbytes\n",
-              rt_hash_mask,
-              (long) (rt_hash_mask * sizeof(struct rt_hash_bucket)) / 1024);
-
-       for (rt_hash_log = 0; (1 << rt_hash_log) != rt_hash_mask; rt_hash_log++)
-               /* NOTHING */;
-
-       rt_hash_mask--;
+       rt_hash_table = (struct rt_hash_bucket *)
+               alloc_large_system_hash("IP route cache",
+                                       sizeof(struct rt_hash_bucket),
+                                       rhash_entries,
+                                       (num_physpages >= 128 * 1024) ?
+                                               (27 - PAGE_SHIFT) :
+                                               (29 - PAGE_SHIFT),
+                                       HASH_HIGHMEM,
+                                       &rt_hash_log,
+                                       &rt_hash_mask,
+                                       0);
        memset(rt_hash_table, 0, (rt_hash_mask + 1) * sizeof(struct rt_hash_bucket));
        rt_hash_lock_init();