From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH] net: udp: add socket option to report RX queue level
Date: Fri, 17 Mar 2017 15:01:10 -0700
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References: <20170317211312.38117-1-ckuiper@google.com>
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Cc: netdev@vger.kernel.org, pgynther@google.com
To: Chris Kuiper <ckuiper@google.com>, Josh Hunt <johunt@akamai.com>
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On Fri, 2017-03-17 at 14:13 -0700, Chris Kuiper wrote:
> This adds a new socket option "SO_RXQ_ALLOC" that enables providing
> the RX queue buffer allocation as ancillary data from the recvmsg()
> system call. The value reported is a byte number and together with
> the RX queue size (obtained via getsockopt(SO_RCVBUF) can be used to
> calculate a percentage value on how full the socket buffer is.
> ---

Seems a lot of overhead, and only UDP would be supported.

I very much prefer Josh Hunt proposal
( https://patchwork.ozlabs.org/patch/738250/ )

Ie using a separate getsockopt() call instead of adding code to UDP fast
path ?