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[NET]: reduce sizeof(struct inet_peer), cleanup, change in peer_check_expire()

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1) shrink struct inet_peer on 64 bits platforms.
This commit is contained in:
Eric Dumazet 2006-10-12 21:21:06 -07:00 committed by David S. Miller
parent ea614d7f4f
commit 4663afe2c8
2 changed files with 24 additions and 22 deletions
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17
include/net/inetpeer.h
View file

@ -19,7 +19,7 @@ struct inet_peer
{
struct inet_peer *avl_left, *avl_right;
struct inet_peer *unused_next, **unused_prevp;
unsigned long dtime; /* the time of last use of not
__u32 dtime; /* the time of last use of not
* referenced entries */
atomic_t refcnt;
__be32 v4daddr; /* peer's address */
@ -35,21 +35,8 @@ void inet_initpeers(void) __init;
/* can be called with or without local BH being disabled */
struct inet_peer *inet_getpeer(__be32 daddr, int create);
extern spinlock_t inet_peer_unused_lock;
extern struct inet_peer **inet_peer_unused_tailp;
/* can be called from BH context or outside */
static inline void inet_putpeer(struct inet_peer *p)
{
spin_lock_bh(&inet_peer_unused_lock);
if (atomic_dec_and_test(&p->refcnt)) {
p->unused_prevp = inet_peer_unused_tailp;
p->unused_next = NULL;
*inet_peer_unused_tailp = p;
inet_peer_unused_tailp = &p->unused_next;
p->dtime = jiffies;
}
spin_unlock_bh(&inet_peer_unused_lock);
}
extern void inet_putpeer(struct inet_peer *p);
extern spinlock_t inet_peer_idlock;
/* can be called with or without local BH being disabled */

29
net/ipv4/inetpeer.c
View file

@ -94,10 +94,8 @@ int inet_peer_minttl = 120 * HZ; /* TTL under high load: 120 sec */
int inet_peer_maxttl = 10 * 60 * HZ; /* usual time to live: 10 min */
static struct inet_peer *inet_peer_unused_head;
/* Exported for inet_putpeer inline function. */
struct inet_peer **inet_peer_unused_tailp = &inet_peer_unused_head;
DEFINE_SPINLOCK(inet_peer_unused_lock);
#define PEER_MAX_CLEANUP_WORK 30
static struct inet_peer **inet_peer_unused_tailp = &inet_peer_unused_head;
static DEFINE_SPINLOCK(inet_peer_unused_lock);
static void peer_check_expire(unsigned long dummy);
static DEFINE_TIMER(peer_periodic_timer, peer_check_expire, 0, 0);
@ -340,7 +338,8 @@ static int cleanup_once(unsigned long ttl)
spin_lock_bh(&inet_peer_unused_lock);
p = inet_peer_unused_head;
if (p != NULL) {
if (time_after(p->dtime + ttl, jiffies)) {
__u32 delta = (__u32)jiffies - p->dtime;
if (delta < ttl) {
/* Do not prune fresh entries. */
spin_unlock_bh(&inet_peer_unused_lock);
return -1;
@ -432,7 +431,7 @@ out_free:
/* Called with local BH disabled. */
static void peer_check_expire(unsigned long dummy)
{
int i;
unsigned long now = jiffies;
int ttl;
if (peer_total >= inet_peer_threshold)
@ -441,7 +440,10 @@ static void peer_check_expire(unsigned long dummy)
ttl = inet_peer_maxttl
- (inet_peer_maxttl - inet_peer_minttl) / HZ *
peer_total / inet_peer_threshold * HZ;
for (i = 0; i < PEER_MAX_CLEANUP_WORK && !cleanup_once(ttl); i++);
while (!cleanup_once(ttl)) {
if (jiffies != now)
break;
}
/* Trigger the timer after inet_peer_gc_mintime .. inet_peer_gc_maxtime
* interval depending on the total number of entries (more entries,
@ -455,3 +457,16 @@ static void peer_check_expire(unsigned long dummy)
peer_total / inet_peer_threshold * HZ;
add_timer(&peer_periodic_timer);
}
void inet_putpeer(struct inet_peer *p)
{
spin_lock_bh(&inet_peer_unused_lock);
if (atomic_dec_and_test(&p->refcnt)) {
p->unused_prevp = inet_peer_unused_tailp;
p->unused_next = NULL;
*inet_peer_unused_tailp = p;
inet_peer_unused_tailp = &p->unused_next;
p->dtime = (__u32)jiffies;
}
spin_unlock_bh(&inet_peer_unused_lock);
}