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SubjectRe: [PATCH net 0/3] rxrpc: Fix retransmission timeout and ACK discard
From: David Howells <>
Date: Thu, 21 May 2020 00:21:42 +0100

> Here are a couple of fixes and an extra tracepoint for AF_RXRPC:
> (1) Calculate the RTO pretty much as TCP does, rather than making
> something up, including an initial 4s timeout (which causes return
> probes from the fileserver to fail if a packet goes missing), and add
> backoff.
> (2) Fix the discarding of out-of-order received ACKs. We mustn't let the
> hard-ACK point regress, nor do we want to do unnecessary
> retransmission because the soft-ACK list regresses. This is not
> trivial, however, due to some loose wording in various old protocol
> specs, the ACK field that should be used for this sometimes has the
> wrong information in it.
> (3) Add a tracepoint to log a discarded ACK.
> The patches are tagged here:
> git://
> rxrpc-fixes-20200520

Pulled, thanks David.

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