mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 07:13:34 +00:00
net: Move napi polling code out of net_rx_action
This patch creates a new function napi_poll and moves the napi polling code from net_rx_action into it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
0d16449195
commit
726ce70e9e
1 changed files with 54 additions and 44 deletions
|
@ -4557,32 +4557,11 @@ void netif_napi_del(struct napi_struct *napi)
|
|||
}
|
||||
EXPORT_SYMBOL(netif_napi_del);
|
||||
|
||||
static void net_rx_action(struct softirq_action *h)
|
||||
static int napi_poll(struct napi_struct *n, struct list_head *repoll)
|
||||
{
|
||||
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
|
||||
unsigned long time_limit = jiffies + 2;
|
||||
int budget = netdev_budget;
|
||||
LIST_HEAD(list);
|
||||
LIST_HEAD(repoll);
|
||||
void *have;
|
||||
|
||||
local_irq_disable();
|
||||
list_splice_init(&sd->poll_list, &list);
|
||||
local_irq_enable();
|
||||
|
||||
while (!list_empty(&list)) {
|
||||
struct napi_struct *n;
|
||||
int work, weight;
|
||||
|
||||
/* If softirq window is exhausted then punt.
|
||||
* Allow this to run for 2 jiffies since which will allow
|
||||
* an average latency of 1.5/HZ.
|
||||
*/
|
||||
if (unlikely(budget <= 0 || time_after_eq(jiffies, time_limit)))
|
||||
goto softnet_break;
|
||||
|
||||
|
||||
n = list_first_entry(&list, struct napi_struct, poll_list);
|
||||
list_del_init(&n->poll_list);
|
||||
|
||||
have = netpoll_poll_lock(n);
|
||||
|
@ -4603,28 +4582,59 @@ static void net_rx_action(struct softirq_action *h)
|
|||
|
||||
WARN_ON_ONCE(work > weight);
|
||||
|
||||
budget -= work;
|
||||
if (likely(work < weight))
|
||||
goto out_unlock;
|
||||
|
||||
/* Drivers must not modify the NAPI state if they
|
||||
* consume the entire weight. In such cases this code
|
||||
* still "owns" the NAPI instance and therefore can
|
||||
* move the instance around on the list at-will.
|
||||
*/
|
||||
if (unlikely(work == weight)) {
|
||||
if (unlikely(napi_disable_pending(n))) {
|
||||
napi_complete(n);
|
||||
} else {
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
if (n->gro_list) {
|
||||
/* flush too old packets
|
||||
* If HZ < 1000, flush all packets.
|
||||
*/
|
||||
napi_gro_flush(n, HZ >= 1000);
|
||||
}
|
||||
list_add_tail(&n->poll_list, &repoll);
|
||||
}
|
||||
|
||||
list_add_tail(&n->poll_list, repoll);
|
||||
|
||||
out_unlock:
|
||||
netpoll_poll_unlock(have);
|
||||
|
||||
return work;
|
||||
}
|
||||
|
||||
netpoll_poll_unlock(have);
|
||||
static void net_rx_action(struct softirq_action *h)
|
||||
{
|
||||
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
|
||||
unsigned long time_limit = jiffies + 2;
|
||||
int budget = netdev_budget;
|
||||
LIST_HEAD(list);
|
||||
LIST_HEAD(repoll);
|
||||
|
||||
local_irq_disable();
|
||||
list_splice_init(&sd->poll_list, &list);
|
||||
local_irq_enable();
|
||||
|
||||
while (!list_empty(&list)) {
|
||||
struct napi_struct *n;
|
||||
|
||||
/* If softirq window is exhausted then punt.
|
||||
* Allow this to run for 2 jiffies since which will allow
|
||||
* an average latency of 1.5/HZ.
|
||||
*/
|
||||
if (unlikely(budget <= 0 || time_after_eq(jiffies, time_limit)))
|
||||
goto softnet_break;
|
||||
|
||||
|
||||
n = list_first_entry(&list, struct napi_struct, poll_list);
|
||||
budget -= napi_poll(n, &repoll);
|
||||
}
|
||||
|
||||
if (!sd_has_rps_ipi_waiting(sd) &&
|
||||
|
|
Loading…
Reference in a new issue