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aoe: print warning regarding a common reason for dropped transmits

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Dropped transmits are not common, but when they do occur, increasing
the transmit queue length often helps.

Signed-off-by: Ed Cashin <[email protected]>
Cc: Dan Carpenter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ed Cashin 2012-12-17 16:03:28 -08:00 • committed by Linus Torvalds
commit 4e78dd144b
1 changed files with 7 additions and 2 deletions
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9
drivers/block/aoe/aoenet.c
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@ -52,13 +52,18 @@ static struct sk_buff_head skbtxq;
/* enters with txlock held */
static int
tx(void)
tx(void) __must_hold(&txlock)
{
struct sk_buff *skb;
struct net_device *ifp;
while ((skb = skb_dequeue(&skbtxq))) {
spin_unlock_irq(&txlock);
dev_queue_xmit(skb);
ifp = skb->dev;
if (dev_queue_xmit(skb) == NET_XMIT_DROP && net_ratelimit())
pr_warn("aoe: packet could not be sent on %s. %s\n",
ifp ? ifp->name : "netif",
"consider increasing tx_queue_len");
spin_lock_irq(&txlock);
}
return 0;