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tcp: remove max_qlen_log

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This control variable was set at first listen(fd, backlog)
call, but not updated if application tried to increase or decrease
backlog. It made sense at the time listener had a non resizeable
hash table.

Also rounding to powers of two was not very friendly.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-10-02 11:43:37 -07:00 • committed by David S. Miller
parent 10cbc8f179
commit ef547f2ac1
4 changed files with 6 additions and 18 deletions
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8
net/core/request_sock.c
View file

@ -37,13 +37,8 @@
int sysctl_max_syn_backlog = 256;
EXPORT_SYMBOL(sysctl_max_syn_backlog);
void reqsk_queue_alloc(struct request_sock_queue *queue,
unsigned int nr_table_entries)
void reqsk_queue_alloc(struct request_sock_queue *queue)
{
nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog);
nr_table_entries = max_t(u32, nr_table_entries, 8);
nr_table_entries = roundup_pow_of_two(nr_table_entries + 1);
spin_lock_init(&queue->rskq_lock);
spin_lock_init(&queue->fastopenq.lock);
@ -53,7 +48,6 @@ void reqsk_queue_alloc(struct request_sock_queue *queue,
queue->fastopenq.max_qlen = 0;
queue->rskq_accept_head = NULL;
queue->max_qlen_log = ilog2(nr_table_entries);
}
/*