On Sun, 26 Feb 2023 09:44:23 -0500 Sasha Levin wrote:

From: Brian Haley <redacted>

[ Upstream commit 62e395f82d04510b0f86e5e603e29412be88596f ]

When set to zero, the neighbor sysctl proxy_delay value
does not cause an immediate reply for ARP/ND requests
as expected, it instead causes a random delay between
[0, U32_MAX). Looking at this comment from
__get_random_u32_below() explains the reason:

Potential behavior change, can we wait 4 weeks, until it's been 
in a couple of -rcs?