inet: Decrease overhead of on-stack inet_cork.
When we fast path datagram sends to avoid locking by putting
the inet_cork on the stack we use up lots of space that isn't
necessary.
This is because inet_cork contains a "struct flowi" which isn't
used in these code paths.
Split inet_cork to two parts, "inet_cork" and "inet_cork_full".
Only the latter of which has the "struct flowi" and is what is
stored in inet_sock.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index ed2ba6e..caaff5f 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -96,17 +96,21 @@
struct inet_cork {
unsigned int flags;
- unsigned int fragsize;
+ __be32 addr;
struct ip_options *opt;
+ unsigned int fragsize;
struct dst_entry *dst;
int length; /* Total length of all frames */
- __be32 addr;
- struct flowi fl;
struct page *page;
u32 off;
u8 tx_flags;
};
+struct inet_cork_full {
+ struct inet_cork base;
+ struct flowi fl;
+};
+
struct ip_mc_socklist;
struct ipv6_pinfo;
struct rtable;
@@ -164,7 +168,7 @@
int mc_index;
__be32 mc_addr;
struct ip_mc_socklist __rcu *mc_list;
- struct inet_cork cork;
+ struct inet_cork_full cork;
};
#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */