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Reclaim only what the new delegation needs

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delegdb_cleanup() was overwriting the caller-supplied 'requested'
value with (hiwater - lowater), so every overmem cleanup tried to
free the full watermark band regardless of how much memory the new
delegation actually needed.  Drop the override so the caller's size
is used: we now walk the SIEVE only until we have reclaimed enough
room for the new node, leaving unrelated entries in place.
This commit is contained in:
Ondřej Surý 2026-04-09 12:46:45 +02:00 committed by Colin Vidal
parent 876a896f0f
commit 4d772cda3c
1 changed files with 0 additions and 1 deletions
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lib/dns/deleg.c
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@ -465,7 +465,6 @@ delegdb_cleanup(dns_qp_t *qp, dns_delegdb_t *delegdb, size_t requested) {
if (!isc_mem_isovermem(delegdb->mctx)) {
return;
}
requested = delegdb->hiwater - delegdb->lowater;
while (reclaimed < requested) {
node = ISC_SIEVE_NEXT(delegdb->lru[isc_tid()], visited, link);