From owner-svn-src-stable-12@freebsd.org Sun Sep 8 20:28:07 2019 Return-Path: Delivered-To: svn-src-stable-12@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 B0820E0A06; Sun, 8 Sep 2019 20:28:07 +0000 (UTC) (envelope-from markj@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46RNCW49Kyz43S5; Sun, 8 Sep 2019 20:28:07 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 5461D274A; Sun, 8 Sep 2019 20:28:07 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x88KS7NZ028280; Sun, 8 Sep 2019 20:28:07 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x88KS7Gv028279; Sun, 8 Sep 2019 20:28:07 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201909082028.x88KS7Gv028279@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Sun, 8 Sep 2019 20:28:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r352038 - stable/12/sys/kern X-SVN-Group: stable-12 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: stable/12/sys/kern X-SVN-Commit-Revision: 352038 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Sep 2019 20:28:07 -0000 Author: markj Date: Sun Sep 8 20:28:06 2019 New Revision: 352038 URL: https://svnweb.freebsd.org/changeset/base/352038 Log: MFC r351547, r351549: Fix several logic issues in domainset_empty_vm(). Modified: stable/12/sys/kern/kern_cpuset.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/kern_cpuset.c ============================================================================== --- stable/12/sys/kern/kern_cpuset.c Sun Sep 8 19:54:28 2019 (r352037) +++ stable/12/sys/kern/kern_cpuset.c Sun Sep 8 20:28:06 2019 (r352038) @@ -457,7 +457,7 @@ static struct domainset * _domainset_create(struct domainset *domain, struct domainlist *freelist) { struct domainset *ndomain; - int i, j, max; + int i, j; KASSERT(domain->ds_cnt <= vm_ndomains, ("invalid domain count in domainset %p", domain)); @@ -476,8 +476,7 @@ _domainset_create(struct domainset *domain, struct dom if (ndomain == NULL) { LIST_INSERT_HEAD(&cpuset_domains, domain, ds_link); domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask); - max = DOMAINSET_FLS(&domain->ds_mask) + 1; - for (i = 0, j = 0; i < max; i++) + for (i = 0, j = 0; i < DOMAINSET_FLS(&domain->ds_mask); i++) if (DOMAINSET_ISSET(i, &domain->ds_mask)) domain->ds_order[j++] = i; } @@ -500,25 +499,31 @@ _domainset_create(struct domainset *domain, struct dom static bool domainset_empty_vm(struct domainset *domain) { - int i, j, max; + domainset_t empty; + int i, j; - max = DOMAINSET_FLS(&domain->ds_mask) + 1; - for (i = 0; i < max; i++) - if (DOMAINSET_ISSET(i, &domain->ds_mask) && VM_DOMAIN_EMPTY(i)) - DOMAINSET_CLR(i, &domain->ds_mask); + DOMAINSET_ZERO(&empty); + for (i = 0; i < vm_ndomains; i++) + if (VM_DOMAIN_EMPTY(i)) + DOMAINSET_SET(i, &empty); + if (DOMAINSET_SUBSET(&empty, &domain->ds_mask)) + return (true); + + /* Remove empty domains from the set and recompute. */ + DOMAINSET_NAND(&domain->ds_mask, &empty); domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask); - max = DOMAINSET_FLS(&domain->ds_mask) + 1; - for (i = j = 0; i < max; i++) { + for (i = j = 0; i < DOMAINSET_FLS(&domain->ds_mask); i++) if (DOMAINSET_ISSET(i, &domain->ds_mask)) domain->ds_order[j++] = i; - else if (domain->ds_policy == DOMAINSET_POLICY_PREFER && - domain->ds_prefer == i && domain->ds_cnt > 1) { - domain->ds_policy = DOMAINSET_POLICY_ROUNDROBIN; - domain->ds_prefer = -1; - } + + /* Convert a PREFER policy referencing an empty domain to RR. */ + if (domain->ds_policy == DOMAINSET_POLICY_PREFER && + DOMAINSET_ISSET(domain->ds_prefer, &empty)) { + domain->ds_policy = DOMAINSET_POLICY_ROUNDROBIN; + domain->ds_prefer = -1; } - return (DOMAINSET_EMPTY(&domain->ds_mask)); + return (false); } /*