From owner-svn-src-all@freebsd.org Fri Jul 13 21:23:04 2018 Return-Path: Delivered-To: svn-src-all@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 D250C1025B3C; Fri, 13 Jul 2018 21:23:04 +0000 (UTC) (envelope-from kib@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 774907999C; Fri, 13 Jul 2018 21:23:04 +0000 (UTC) (envelope-from kib@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 57C4115A18; Fri, 13 Jul 2018 21:23:04 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w6DLN47T037092; Fri, 13 Jul 2018 21:23:04 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w6DLN4ra037091; Fri, 13 Jul 2018 21:23:04 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201807132123.w6DLN4ra037091@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 13 Jul 2018 21:23:04 +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: r336265 - stable/11/sys/vm X-SVN-Group: stable-11 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/11/sys/vm X-SVN-Commit-Revision: 336265 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jul 2018 21:23:05 -0000 Author: kib Date: Fri Jul 13 21:23:03 2018 New Revision: 336265 URL: https://svnweb.freebsd.org/changeset/base/336265 Log: MFC r336030: Save a call to pmap_remove() if entry cannot have any pages mapped. Modified: stable/11/sys/vm/vm_map.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/vm/vm_map.c ============================================================================== --- stable/11/sys/vm/vm_map.c Fri Jul 13 21:03:32 2018 (r336264) +++ stable/11/sys/vm/vm_map.c Fri Jul 13 21:23:03 2018 (r336265) @@ -3099,7 +3099,14 @@ vm_map_delete(vm_map_t map, vm_offset_t start, vm_offs if (entry->wired_count != 0) vm_map_entry_unwire(map, entry); - pmap_remove(map->pmap, entry->start, entry->end); + /* + * Remove mappings for the pages, but only if the + * mappings could exist. For instance, it does not + * make sense to call pmap_remove() for guard entries. + */ + if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0 || + entry->object.vm_object != NULL) + pmap_remove(map->pmap, entry->start, entry->end); /* * Delete the entry only after removing all pmap