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[NETPOLL]: add retry timeout

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Add limited retry logic to netpoll_send_skb

Each time we attempt to send, decrement our per-device retry counter.
On every successful send, we reset the counter. 

We delay 50us between attempts with up to 20000 retries for a total of
1 second. After we've exhausted our retries, subsequent failed
attempts will try only once until reset by success.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Mackall 2005-08-11 19:25:54 -07:00 • committed by David S. Miller
parent f0d3459d07
commit 0db1d6fc1e
2 changed files with 11 additions and 3 deletions
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1
include/linux/netpoll.h
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@ -26,6 +26,7 @@ struct netpoll {
struct netpoll_info {
spinlock_t poll_lock;
int poll_owner;
int tries;
int rx_flags;
spinlock_t rx_lock;
struct netpoll *rx_np; /* netpoll that registered an rx_hook */