From owner-svn-src-stable-11@freebsd.org Sat Nov 4 10:10:35 2017 Return-Path: Delivered-To: svn-src-stable-11@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 E3DF0E69FBE; Sat, 4 Nov 2017 10:10:35 +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 mx1.freebsd.org (Postfix) with ESMTPS id B2F9C6757C; Sat, 4 Nov 2017 10:10:35 +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 vA4AAY8j080278; Sat, 4 Nov 2017 10:10:34 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vA4AAYsj080277; Sat, 4 Nov 2017 10:10:34 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201711041010.vA4AAYsj080277@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sat, 4 Nov 2017 10:10:34 +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: r325385 - 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: 325385 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-11@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for only the 11-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Nov 2017 10:10:36 -0000 Author: kib Date: Sat Nov 4 10:10:34 2017 New Revision: 325385 URL: https://svnweb.freebsd.org/changeset/base/325385 Log: MFC r324824: Check that the page which is freed as zeroed, indeed has all-zero content. Modified: stable/11/sys/vm/vm_page.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/vm/vm_page.c ============================================================================== --- stable/11/sys/vm/vm_page.c Sat Nov 4 07:05:21 2017 (r325384) +++ stable/11/sys/vm/vm_page.c Sat Nov 4 10:10:34 2017 (r325385) @@ -2767,6 +2767,16 @@ bool vm_page_free_prep(vm_page_t m, bool pagequeue_locked) { +#if defined(DIAGNOSTIC) && defined(PHYS_TO_DMAP) + if ((m->flags & PG_ZERO) != 0) { + uint64_t *p; + int i; + p = (uint64_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); + for (i = 0; i < PAGE_SIZE / sizeof(uint64_t); i++, p++) + KASSERT(*p == 0, ("vm_page_free_prep %p PG_ZERO %d %jx", + m, i, (uintmax_t)*p)); + } +#endif if ((m->oflags & VPO_UNMANAGED) == 0) { vm_page_lock_assert(m, MA_OWNED); KASSERT(!pmap_page_is_mapped(m),