per-netns ipv4 sysctl_tcp_mem

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 43dfccce62e94a44efef1f2f0d6dae9c4b7357e8..9bcdec3ad772171a6aa71584b86bc5c1c998db83 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -282,11 +282,9 @@ int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
 struct percpu_counter tcp_orphan_count;
 EXPORT_SYMBOL_GPL(tcp_orphan_count);
 
-long sysctl_tcp_mem[3] __read_mostly;
 int sysctl_tcp_wmem[3] __read_mostly;
 int sysctl_tcp_rmem[3] __read_mostly;
 
-EXPORT_SYMBOL(sysctl_tcp_mem);
 EXPORT_SYMBOL(sysctl_tcp_rmem);
 EXPORT_SYMBOL(sysctl_tcp_wmem);
 
@@ -3278,14 +3276,9 @@ void __init tcp_init(void)
        sysctl_tcp_max_orphans = cnt / 2;
        sysctl_max_syn_backlog = max(128, cnt / 256);
 
-       limit = nr_free_buffer_pages() / 8;
-       limit = max(limit, 128UL);
-       sysctl_tcp_mem[0] = limit / 4 * 3;
-       sysctl_tcp_mem[1] = limit;
-       sysctl_tcp_mem[2] = sysctl_tcp_mem[0] * 2;
-
        /* Set per-socket limits to no more than 1/128 the pressure threshold */
-       limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7);
+       limit = ((unsigned long)init_net.ipv4.sysctl_tcp_mem[1])
+               << (PAGE_SHIFT - 7);
        max_share = min(4UL*1024*1024, limit);
 
        sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;