From b7f5450e4dcfb0ba7a61c2236246a0d670e887ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Wed, 4 Mar 2020 13:35:43 +0100
Subject: [PATCH] knot-resolver: apply upstream patch

Encrypted ZFS users were affected, in particular some NixOS users
who reported the issue upstream.  Close #81188.
---
 pkgs/servers/dns/knot-resolver/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/servers/dns/knot-resolver/default.nix b/pkgs/servers/dns/knot-resolver/default.nix
index c1c826b7812..ccb9a859059 100644
--- a/pkgs/servers/dns/knot-resolver/default.nix
+++ b/pkgs/servers/dns/knot-resolver/default.nix
@@ -23,6 +23,14 @@ unwrapped = stdenv.mkDerivation rec {
     sha256 = "4a93264ad0cda7ea2252d1ba057e474722f77848165f2893e0c76e21ae406415";
   };
 
+  patches = [
+    (fetchpatch { # merged to upstream master, remove on update
+      name = "zfs-cpu-usage.diff";
+      url = "https://gitlab.labs.nic.cz/knot/knot-resolver/merge_requests/946.diff";
+      sha256 = "0mcvx4pfnl19h6zrv2fcgxdjarqzczn2dz85sylcczsfvdmn6i5m";
+    })
+  ];
+
   outputs = [ "out" "dev" ];
 
   # Path fixups for the NixOS service.