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Replace FIXME with rationale for not cleaning expired delegdb nodes

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Expired delegation nodes are naturally replaced when the resolver
fetches fresh data, and any remaining stale nodes are reclaimed by
SIEVE eviction under memory pressure.
This commit is contained in:
Ondřej Surý 2026-04-10 13:19:55 +02:00 committed by Colin Vidal
parent 193e01ab20
commit ec024735df
1 changed files with 5 additions and 3 deletions
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8
lib/dns/deleg.c
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@ -339,9 +339,11 @@ dns__deleg_lookup(dns_delegdb_t *delegdb, dns_qpread_t *qpr,
}
/*
* FIXME: if we lookup something that has expired, we need
* either the "deadnodes" (see qpcache) mechanism here - or call
* something like isc_async_run(delete_me, node).
* The expired node will be replaced when the resolver fetches
* a fresh delegation, so there is no need to schedule explicit
* cleanup here. Stale nodes that are never replaced will
* eventually be evicted by the SIEVE policy under memory
* pressure.
*/
return ISC_R_NOTFOUND;
}