From owner-dev-commits-src-all@freebsd.org Sat Aug 14 16:52:05 2021 Return-Path: Delivered-To: dev-commits-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2860566FCFB; Sat, 14 Aug 2021 16:52:05 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Gn60N4cx4z4WNq; Sat, 14 Aug 2021 16:52:04 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6FBDE25B26; Sat, 14 Aug 2021 16:52:04 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 17EGq4Fs049090; Sat, 14 Aug 2021 16:52:04 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 17EGq44O049089; Sat, 14 Aug 2021 16:52:04 GMT (envelope-from git) Date: Sat, 14 Aug 2021 16:52:04 GMT Message-Id: <202108141652.17EGq44O049089@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mateusz Guzik Subject: git: 8afe9481cfa3 - main - frag6: do less work in frag6_slowtimo if possible MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mjg X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 8afe9481cfa382337b8a885f358fe888bddf5982 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Aug 2021 16:52:05 -0000 The branch main has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=8afe9481cfa382337b8a885f358fe888bddf5982 commit 8afe9481cfa382337b8a885f358fe888bddf5982 Author: Mateusz Guzik AuthorDate: 2021-08-13 11:32:03 +0000 Commit: Mateusz Guzik CommitDate: 2021-08-14 16:51:00 +0000 frag6: do less work in frag6_slowtimo if possible frag6_slowtimo avoidably uses CPU on otherwise idle boxes Reviewed by: kp Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D31528 --- sys/netinet6/frag6.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/netinet6/frag6.c b/sys/netinet6/frag6.c index ec35e98d25ec..222bd157fddd 100644 --- a/sys/netinet6/frag6.c +++ b/sys/netinet6/frag6.c @@ -891,10 +891,15 @@ frag6_slowtimo(void) struct ip6q *q6, *q6tmp; uint32_t bucket; + if (atomic_load_int(&frag6_nfrags) == 0) + return; + VNET_LIST_RLOCK_NOSLEEP(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { + if (V_ip6qb[bucket].count == 0) + continue; IP6QB_LOCK(bucket); head = IP6QB_HEAD(bucket); TAILQ_FOREACH_SAFE(q6, head, ip6q_tq, q6tmp)