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tipc: reduce sensitive to retransmit failures 

With huge cluster (e.g >200nodes), the amount of that flow:
gap -> retransmit packet -> acked will take time in case of STATE_MSG
dropped/delayed because a lot of traffic. This lead to 1.5 sec tolerance
value criteria made link easy failure around 2nd, 3rd of failed
retransmission attempts.

Instead of re-introduced criteria of 99 faled retransmissions to fix the
issue, we increase failure detection timer to ten times tolerance value.

Fixes: 77cf8edbc0 ("tipc: simplify stale link failure criteria")
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Acked-by: Jon
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hoang Le 2019-11-06 13:26:10 +07:00 committed by David S. Miller
parent 6708ef7792
commit 426071f1f3
1 changed files with 1 additions and 1 deletions
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2
net/tipc/link.c
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@ -1087,7 +1087,7 @@ static bool link_retransmit_failure(struct tipc_link *l, struct tipc_link *r,
return false; return false;
if (!time_after(jiffies, TIPC_SKB_CB(skb)->retr_stamp + if (!time_after(jiffies, TIPC_SKB_CB(skb)->retr_stamp +
msecs_to_jiffies(r->tolerance))) msecs_to_jiffies(r->tolerance * 10)))
return false; return false;
hdr = buf_msg(skb); hdr = buf_msg(skb);