Update2: [PATCH] Instruct the kernel to reset the connection for SC_RX_TIMEOUT, and others

Nils Goroll slink at schokola.de
Mon Mar 2 21:05:19 CET 2015

On 01/03/15 10:05, Poul-Henning Kamp wrote:
> The problem with !SO_LINGER (we tried it some years back) is that
> all queued data is discarded the moment you call close(2), and we
> have no way to know if our last response is still lingering in the
> kernel's tcp-buffers and dribbling out to a slow client with a bad
> mobile phone connection.

I finally have understood the issue with http keepalive here and that kernels
behave differently than how I thought they would. Also I have now understood
that phk had already invested significant effort into this and I basically also
ended up "out-of-ideas".

Except for this: As long was we know that we cannot possibly have written
anything, we should we OK to close with RST.

The attached updated patch takes a simplistic approach to this.

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