diff options
Diffstat (limited to 'net/core/netpoll.c')
| -rw-r--r-- | net/core/netpoll.c | 53 |
1 files changed, 21 insertions, 32 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 6589adb14cb..4de62f1f413 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; |