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inetpeer: speed up inetpeer_invalidate_tree()

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As measured in my prior patch ("sch_netem: faster rb tree removal"),
rbtree_postorder_for_each_entry_safe() is nice looking but much slower
than using rb_next() directly, except when tree is small enough
to fit in CPU caches (then the cost is the same)

From: Eric Dumazet <edumazet@google.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-09-25 09:14:14 -07:00 committed by David S. Miller
parent a2e4a21906
commit 8f1975e31d
1 changed files with 7 additions and 4 deletions
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11
net/ipv4/inetpeer.c
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@ -284,14 +284,17 @@ EXPORT_SYMBOL(inet_peer_xrlim_allow);
void inetpeer_invalidate_tree(struct inet_peer_base *base)
{
struct inet_peer *p, *n;
struct rb_node *p = rb_first(&base->rb_root);
rbtree_postorder_for_each_entry_safe(p, n, &base->rb_root, rb_node) {
inet_putpeer(p);
while (p) {
struct inet_peer *peer = rb_entry(p, struct inet_peer, rb_node);
p = rb_next(p);
rb_erase(&peer->rb_node, &base->rb_root);
inet_putpeer(peer);
cond_resched();
}
base->rb_root = RB_ROOT;
base->total = 0;
}
EXPORT_SYMBOL(inetpeer_invalidate_tree);