From: Ondřej Surý <ondrej@isc.org>
Date: Tue, 23 Sep 2025 22:08:45 +0000 (+0200)
Subject: chg: dev: Use lock-free hashtable for storing resolver fetch contexts
X-Git-Tag: v9.21.14~30
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0ac744ee4de865b31047b3401f138acfad8d7829;p=thirdparty%2Fbind9.git

chg: dev: Use lock-free hashtable for storing resolver fetch contexts

Replace the locked hashmap with the lock-free hashtable from the RCU
library and protect the fetch contexts against reuse by replacing the
libisc reference counting with urcu_ref that can soft-fail in situation
where the reference count is already zero.  This allows us to easily
skip re-using the fetch context if it is already in process of being
destroyed.

Merge branch 'ondrej/use-urcu-lfht-for-resolver-tables' into 'main'

See merge request isc-projects/bind9!10653
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0ac744ee4de865b31047b3401f138acfad8d7829