netdev - Re: [net-next 2/2] tipc: reduce sensitive to retransmit failures

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Message-Id: <20191106.173804.1947552656782797433.davem@davemloft.net>
Date:   Wed, 06 Nov 2019 17:38:04 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     hoang.h.le@...tech.com.au
Cc:     jon.maloy@...csson.com, maloy@...jonn.com, netdev@...r.kernel.org,
        tipc-discussion@...ts.sourceforge.net
Subject: Re: [net-next 2/2] tipc: reduce sensitive to retransmit failures

From: Hoang Le <hoang.h.le@...tech.com.au>
Date: Wed,  6 Nov 2019 13:26:10 +0700

> 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: 77cf8edbc0e7 ("tipc: simplify stale link failure criteria")
> Acked-by: Jon Maloy <jon.maloy@...csson.com>
> Signed-off-by: Hoang Le <hoang.h.le@...tech.com.au>

Applied.