netdev - Re: [RFC net-next af_unix v1 0/1] Allow delivery of SIGURG on AF

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Message-ID: <20201118083446.54c58110@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Wed, 18 Nov 2020 08:34:46 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     rao.shoaib@...cle.com
Cc:     netdev@...r.kernel.org
Subject: Re: [RFC net-next af_unix v1 0/1] Allow delivery of SIGURG on
 AF_UNIX streams socket

On Sat, 14 Nov 2020 18:58:04 -0800 rao.shoaib@...cle.com wrote:
> From: Rao Shoaib <rao.shoaib@...cle.com>
> 
> The use of AF_UNIX sockets is on the rise. We have a case where thousands
> of processes connect locally to a database and issue queries that are
> serviced by a pool of threads. Communication is done over AF_UNIX
> sockets. Currently, there is no way for the submitter to signal the
> servicing thread about an urgent condition such as abandoning
> the query. This patch addresses that requirement by adding support for
> MSG_OOB flag for AF_UNIX sockets. On receipt of such a flag,
> the kernel sends a SIGURG to the peer.

You need to widen the CC list on this, I doubt anyone paid much
attention.