From owner-svn-src-stable@freebsd.org Mon Jul 30 19:23:53 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6D4E9105EE4E; Mon, 30 Jul 2018 19:23:53 +0000 (UTC) (envelope-from rmacklem@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0FDD180A67; Mon, 30 Jul 2018 19:23:53 +0000 (UTC) (envelope-from rmacklem@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 DF700C22; Mon, 30 Jul 2018 19:23:52 +0000 (UTC) (envelope-from rmacklem@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w6UJNqKT033454; Mon, 30 Jul 2018 19:23:52 GMT (envelope-from rmacklem@FreeBSD.org) Received: (from rmacklem@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w6UJNqWd033453; Mon, 30 Jul 2018 19:23:52 GMT (envelope-from rmacklem@FreeBSD.org) Message-Id: <201807301923.w6UJNqWd033453@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: rmacklem set sender to rmacklem@FreeBSD.org using -f From: Rick Macklem Date: Mon, 30 Jul 2018 19:23:52 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r336927 - stable/11/sys/rpc X-SVN-Group: stable-11 X-SVN-Commit-Author: rmacklem X-SVN-Commit-Paths: stable/11/sys/rpc X-SVN-Commit-Revision: 336927 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@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Jul 2018 19:23:53 -0000 Author: rmacklem Date: Mon Jul 30 19:23:52 2018 New Revision: 336927 URL: https://svnweb.freebsd.org/changeset/base/336927 Log: MFC: r335866 Fix the server side krpc so that the kernel nfsd threads terminate. Occationally the kernel nfsd threads would not terminate when a SIGKILL was posted for the kernel process (called nfsd (slave)). When this occurred, the thread associated with the process (called "ismaster") had returned from svc_run_internal() and was sleeping waiting for the other threads to terminate. The other threads (created by kthread_start()) were still in svc_run_internal() handling NFS RPCs. The only way this could occur is for the "ismaster" thread to return from svc_run_internal() without having called svc_exit(). There was only one place in the code where this could happen and this patch stops that from happening. Since the problem is intermittent, I cannot be sure if this has fixed the problem, but I have not seen an occurrence of the problem with this patch applied. Modified: stable/11/sys/rpc/svc.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/rpc/svc.c ============================================================================== --- stable/11/sys/rpc/svc.c Mon Jul 30 18:29:46 2018 (r336926) +++ stable/11/sys/rpc/svc.c Mon Jul 30 19:23:52 2018 (r336927) @@ -1183,7 +1183,8 @@ svc_run_internal(SVCGROUP *grp, bool_t ismaster) /* * Enforce maxthreads count. */ - if (grp->sg_threadcount > grp->sg_maxthreads) + if (!ismaster && grp->sg_threadcount > + grp->sg_maxthreads) break; /*