From owner-svn-src-head@freebsd.org Mon May 28 23:16:40 2018 Return-Path: Delivered-To: svn-src-head@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 AF546EFDD18; Mon, 28 May 2018 23:16:40 +0000 (UTC) (envelope-from mmacy@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 61A8D696DC; Mon, 28 May 2018 23:16:40 +0000 (UTC) (envelope-from mmacy@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 42EB413E22; Mon, 28 May 2018 23:16:40 +0000 (UTC) (envelope-from mmacy@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w4SNGeZG001411; Mon, 28 May 2018 23:16:40 GMT (envelope-from mmacy@FreeBSD.org) Received: (from mmacy@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w4SNGetx001410; Mon, 28 May 2018 23:16:40 GMT (envelope-from mmacy@FreeBSD.org) Message-Id: <201805282316.w4SNGetx001410@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mmacy set sender to mmacy@FreeBSD.org using -f From: Matt Macy Date: Mon, 28 May 2018 23:16:40 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r334300 - head/sys/dev/hwpmc X-SVN-Group: head X-SVN-Commit-Author: mmacy X-SVN-Commit-Paths: head/sys/dev/hwpmc X-SVN-Commit-Revision: 334300 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 May 2018 23:16:40 -0000 Author: mmacy Date: Mon May 28 23:16:39 2018 New Revision: 334300 URL: https://svnweb.freebsd.org/changeset/base/334300 Log: hwmpc: fix brain-damaged handling of thread descriptor freeing Modified: head/sys/dev/hwpmc/hwpmc_mod.c Modified: head/sys/dev/hwpmc/hwpmc_mod.c ============================================================================== --- head/sys/dev/hwpmc/hwpmc_mod.c Mon May 28 23:14:38 2018 (r334299) +++ head/sys/dev/hwpmc/hwpmc_mod.c Mon May 28 23:16:39 2018 (r334300) @@ -2351,9 +2351,9 @@ pmc_thread_descriptor_pool_free_task(void *arg __unuse /* Determine what changes, if any, we need to make. */ mtx_lock_spin(&pmc_threadfreelist_mtx); delta = pmc_threadfreelist_entries - pmc_threadfreelist_max; - while (delta > 0) { - pt = LIST_FIRST(&pmc_threadfreelist); - MPASS(pt); + while (delta > 0 && + (pt = LIST_FIRST(&pmc_threadfreelist)) != NULL) { + delta--; LIST_REMOVE(pt, pt_next); LIST_INSERT_HEAD(&tmplist, pt, pt_next); } @@ -2361,7 +2361,7 @@ pmc_thread_descriptor_pool_free_task(void *arg __unuse /* If there are entries to free, free them. */ while (!LIST_EMPTY(&tmplist)) { - pt = LIST_FIRST(&pmc_threadfreelist); + pt = LIST_FIRST(&tmplist); LIST_REMOVE(pt, pt_next); free(pt, M_PMC); }