From mboxrd@z Thu Jan 1 00:00:00 1970 From: Satoshi OSHIMA Subject: [RFC/PATCH 2/3] UDP memory usage accounting (take 3): accounting unit and variable Date: Tue, 02 Oct 2007 22:13:44 +0900 Message-ID: <47024408.5040007@hitachi.com> References: <4702430C.2080002@hitachi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Andi Kleen , Evgeniy Polyakov , Herbert Xu , ?? ?? , Yumiko SUGITA , "??@RedHat" To: David Miller , netdev Return-path: Received: from mail7.hitachi.co.jp ([133.145.228.42]:44972 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751660AbXJBNNt (ORCPT ); Tue, 2 Oct 2007 09:13:49 -0400 Received: from mlsv18.hitachi.co.jp (unknown [133.144.234.166]) by mail7.hitachi.co.jp (Postfix) with ESMTP id 5D93E37B27 for ; Tue, 2 Oct 2007 22:13:48 +0900 (JST) In-Reply-To: <4702430C.2080002@hitachi.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org This patch introduces global variable for UDP memory accounting. The unit is page. signed-off-by: Satoshi Oshima signed-off-by: Hideo Aoki Index: 2.6.23-rc3-udp_limit/include/net/sock.h =================================================================== --- 2.6.23-rc3-udp_limit.orig/include/net/sock.h +++ 2.6.23-rc3-udp_limit/include/net/sock.h @@ -723,6 +723,13 @@ static inline int sk_stream_wmem_schedul sk_stream_mem_schedule(sk, size, 0); } +#define SK_DATAGRAM_MEM_QUANTUM ((int)PAGE_SIZE) + +static inline int sk_datagram_pages(int amt) +{ + return DIV_ROUND_UP(amt, SK_DATAGRAM_MEM_QUANTUM); +} + /* Used by processes to "lock" a socket state, so that * interrupts and bottom half handlers won't change it * from under us. It essentially blocks any incoming Index: 2.6.23-rc3-udp_limit/include/net/udp.h =================================================================== --- 2.6.23-rc3-udp_limit.orig/include/net/udp.h +++ 2.6.23-rc3-udp_limit/include/net/udp.h @@ -65,6 +65,8 @@ extern rwlock_t udp_hash_lock; extern struct proto udp_prot; +extern atomic_t udp_memory_allocated; + struct sk_buff; /* Index: 2.6.23-rc3-udp_limit/net/ipv4/proc.c =================================================================== --- 2.6.23-rc3-udp_limit.orig/net/ipv4/proc.c +++ 2.6.23-rc3-udp_limit/net/ipv4/proc.c @@ -66,7 +66,8 @@ static int sockstat_seq_show(struct seq_ fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count), tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), atomic_read(&tcp_memory_allocated)); - seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot)); + seq_printf(seq, "UDP: inuse %d mem %d\n", fold_prot_inuse(&udp_prot), + atomic_read(&udp_memory_allocated)); seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot)); seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot)); seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues, Index: 2.6.23-rc3-udp_limit/net/ipv4/udp.c =================================================================== --- 2.6.23-rc3-udp_limit.orig/net/ipv4/udp.c +++ 2.6.23-rc3-udp_limit/net/ipv4/udp.c @@ -113,6 +113,10 @@ DEFINE_SNMP_STAT(struct udp_mib, udp_sta struct hlist_head udp_hash[UDP_HTABLE_SIZE]; DEFINE_RWLOCK(udp_hash_lock); +atomic_t udp_memory_allocated; + +EXPORT_SYMBOL(udp_memory_allocated); + static int udp_port_rover; static inline int __udp_lib_lport_inuse(__u16 num, struct hlist_head udptable[])