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Date: Fri, 28 Sep 2007 22:40:02 +0900 From: Satoshi OSHIMA <satoshi.oshima.fk@...achi.com> To: Andi Kleen <andi@...stfloor.org>, Evgeniy Polyakov <johnpol@....mipt.ru>, netdev <netdev@...r.kernel.org> Cc: Yumiko SUGITA <yumiko.sugita.yf@...achi.com>, "青木@RedHat" <haoki@...hat.com>, 吉藤 英明 <yoshfuji@...ux-ipv6.org> Subject: [RFC/PATCH 2/3] UDP memory usage accounting: accounting unit and variable This patch introduces global variable for UDP memory accounting. The unit is page. signed-off-by: Satoshi Oshima <satoshi.oshima.fk@...achi.com> signed-off-by: Hideo Aoki <haoki@...hat.com> 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[]) - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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