From owner-svn-src-stable@FreeBSD.ORG Wed Feb 15 18:18:30 2012 Return-Path: Delivered-To: svn-src-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 751871065673; Wed, 15 Feb 2012 18:18:30 +0000 (UTC) (envelope-from alc@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 63B208FC19; Wed, 15 Feb 2012 18:18:30 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q1FIIUsK074934; Wed, 15 Feb 2012 18:18:30 GMT (envelope-from alc@svn.freebsd.org) Received: (from alc@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id q1FIIUmr074932; Wed, 15 Feb 2012 18:18:30 GMT (envelope-from alc@svn.freebsd.org) Message-Id: <201202151818.q1FIIUmr074932@svn.freebsd.org> From: Alan Cox Date: Wed, 15 Feb 2012 18:18:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r231776 - stable/8/sys/fs/tmpfs X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.5 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: Wed, 15 Feb 2012 18:18:30 -0000 Author: alc Date: Wed Feb 15 18:18:29 2012 New Revision: 231776 URL: http://svn.freebsd.org/changeset/base/231776 Log: MFC r229363 Don't pass VM_ALLOC_ZERO to vm_page_grab() in tmpfs_mappedwrite() and tmpfs_nocacheread(). It is both unnecessary and a pessimization. It results in either the page being zeroed twice or zeroed first and then overwritten by an I/O operation. Modified: stable/8/sys/fs/tmpfs/tmpfs_vnops.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/boot/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/e1000/ (props changed) Modified: stable/8/sys/fs/tmpfs/tmpfs_vnops.c ============================================================================== --- stable/8/sys/fs/tmpfs/tmpfs_vnops.c Wed Feb 15 18:15:26 2012 (r231775) +++ stable/8/sys/fs/tmpfs/tmpfs_vnops.c Wed Feb 15 18:18:29 2012 (r231776) @@ -437,7 +437,7 @@ tmpfs_nocacheread(vm_object_t tobj, vm_p VM_OBJECT_LOCK(tobj); vm_object_pip_add(tobj, 1); m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | - VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); + VM_ALLOC_NORMAL | VM_ALLOC_RETRY); if (m->valid != VM_PAGE_BITS_ALL) { if (vm_pager_has_page(tobj, idx, NULL, NULL)) { error = vm_pager_get_pages(tobj, &m, 1, 0); @@ -638,7 +638,7 @@ nocache: VM_OBJECT_LOCK(tobj); vm_object_pip_add(tobj, 1); tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | - VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); + VM_ALLOC_NORMAL | VM_ALLOC_RETRY); if (tpg->valid != VM_PAGE_BITS_ALL) { if (vm_pager_has_page(tobj, idx, NULL, NULL)) { error = vm_pager_get_pages(tobj, &tpg, 1, 0);