From owner-svn-src-head@freebsd.org Sat Nov 11 21:50:37 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 61958E4D522; Sat, 11 Nov 2017 21:50:37 +0000 (UTC) (envelope-from mjg@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 mx1.freebsd.org (Postfix) with ESMTPS id 2EB8C6FDDB; Sat, 11 Nov 2017 21:50:37 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vABLoaNX033504; Sat, 11 Nov 2017 21:50:36 GMT (envelope-from mjg@FreeBSD.org) Received: (from mjg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vABLoaOl033503; Sat, 11 Nov 2017 21:50:36 GMT (envelope-from mjg@FreeBSD.org) Message-Id: <201711112150.vABLoaOl033503@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mjg set sender to mjg@FreeBSD.org using -f From: Mateusz Guzik Date: Sat, 11 Nov 2017 21:50:36 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r325725 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: mjg X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 325725 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: 2.1.23 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: Sat, 11 Nov 2017 21:50:37 -0000 Author: mjg Date: Sat Nov 11 21:50:36 2017 New Revision: 325725 URL: https://svnweb.freebsd.org/changeset/base/325725 Log: sysctl: try to avoid malloc in name2oid name2oid is called all the time and passed names are almost always very short (< 16 characters). Modified: head/sys/kern/kern_sysctl.c Modified: head/sys/kern/kern_sysctl.c ============================================================================== --- head/sys/kern/kern_sysctl.c Sat Nov 11 20:12:48 2017 (r325724) +++ head/sys/kern/kern_sysctl.c Sat Nov 11 21:50:36 2017 (r325725) @@ -1209,17 +1209,21 @@ sysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) int error, oid[CTL_MAXNAME], len = 0; struct sysctl_oid *op = NULL; struct rm_priotracker tracker; + char buf[32]; if (!req->newlen) return (ENOENT); if (req->newlen >= MAXPATHLEN) /* XXX arbitrary, undocumented */ return (ENAMETOOLONG); - p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); + p = buf; + if (req->newlen >= sizeof(buf)) + p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); error = SYSCTL_IN(req, p, req->newlen); if (error) { - free(p, M_SYSCTL); + if (p != buf) + free(p, M_SYSCTL); return (error); } @@ -1229,7 +1233,8 @@ sysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) error = name2oid(p, oid, &len, &op); SYSCTL_RUNLOCK(&tracker); - free(p, M_SYSCTL); + if (p != buf) + free(p, M_SYSCTL); if (error) return (error);