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-rw-r--r--net/core/netpoll.c53
1 files changed, 21 insertions, 32 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 6589adb14cbf..4de62f1f4134 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -36,9 +36,7 @@
#define MAX_QUEUE_DEPTH (MAX_SKBS / 2)
#define MAX_RETRIES 20000
-static DEFINE_SPINLOCK(skb_list_lock);
-static int nr_skbs;
-static struct sk_buff *skbs;
+static struct sk_buff_head skb_pool;
static DEFINE_SPINLOCK(queue_lock);
static int queue_depth;
@@ -190,17 +188,15 @@ static void refill_skbs(void)
struct sk_buff *skb;
unsigned long flags;
- spin_lock_irqsave(&skb_list_lock, flags);
- while (nr_skbs < MAX_SKBS) {
+ spin_lock_irqsave(&skb_pool.lock, flags);
+ while (skb_pool.qlen < MAX_SKBS) {
skb = alloc_skb(MAX_SKB_SIZE, GFP_ATOMIC);
if (!skb)
break;
- skb->next = skbs;
- skbs = skb;
- nr_skbs++;
+ __skb_queue_tail(&skb_pool, skb);
}
- spin_unlock_irqrestore(&skb_list_lock, flags);
+ spin_unlock_irqrestore(&skb_pool.lock, flags);
}
static void zap_completion_queue(void)
@@ -229,38 +225,25 @@ static void zap_completion_queue(void)
put_cpu_var(softnet_data);
}
-static struct sk_buff * find_skb(struct netpoll *np, int len, int reserve)
+static struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)
{
- int once = 1, count = 0;
- unsigned long flags;
- struct sk_buff *skb = NULL;
+ int count = 0;
+ struct sk_buff *skb;
zap_completion_queue();
+ refill_skbs();
repeat:
- if (nr_skbs < MAX_SKBS)
- refill_skbs();
skb = alloc_skb(len, GFP_ATOMIC);
-
- if (!skb) {
- spin_lock_irqsave(&skb_list_lock, flags);
- skb = skbs;
- if (skb) {
- skbs = skb->next;
- skb->next = NULL;
- nr_skbs--;
- }
- spin_unlock_irqrestore(&skb_list_lock, flags);
- }
+ if (!skb)
+ skb = skb_dequeue(&skb_pool);
if(!skb) {
- count++;
- if (once && (count == 1000000)) {
- printk("out of netpoll skbs!\n");
- once = 0;
+ if (++count < 10) {
+ netpoll_poll(np);
+ goto repeat;
}
- netpoll_poll(np);
- goto repeat;
+ return NULL;
}
atomic_set(&skb->users, 1);
@@ -770,6 +753,12 @@ int netpoll_setup(struct netpoll *np)
return -1;
}
+static int __init netpoll_init(void) {
+ skb_queue_head_init(&skb_pool);
+ return 0;
+}
+core_initcall(netpoll_init);
+
void netpoll_cleanup(struct netpoll *np)
{
struct netpoll_info *npinfo;