tree 0312d7ddb120ae1f1c67e9b7fccb2bc3d24d9ba7
parent 43839d0ec40d8aa57c97955fc2dc6bfc1404d3c0
author Emeric Brun <ebrun@haproxy.com> 1623398885 +0200
committer Willy Tarreau <w@1wt.eu> 1623832028 +0200
encoding latin1

MEDIUM: resolvers: add a ref on server to the used A/AAAA answer item

This patch adds a head list into answer items on servers which use
this record to set their IPs. It makes lookup on duplicated ip faster and
allow to check immediatly if an item is still valid renewing the IP.

This results in better performances on A/AAAA resolutions.

This is an optimization but it could avoid to trigger the haproxy's
internal wathdog in some circumstances. And for this reason
it should be backported as far we can (2.0 ?)

(cherry picked from commit bd78c912fd73b8506a39c53b6f0b00330f998aca)
Signed-off-by: Willy Tarreau <w@1wt.eu>