From owner-svn-src-head@freebsd.org Sun Sep 1 00:33:17 2019 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 4536FE410B; Sun, 1 Sep 2019 00:33:17 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46LZ2516Mpz4SWd; Sun, 1 Sep 2019 00:33:17 +0000 (UTC) (envelope-from kevans@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 0A6AF212CF; Sun, 1 Sep 2019 00:33:17 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x810XGWr036905; Sun, 1 Sep 2019 00:33:16 GMT (envelope-from kevans@FreeBSD.org) Received: (from kevans@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x810XGa9036904; Sun, 1 Sep 2019 00:33:16 GMT (envelope-from kevans@FreeBSD.org) Message-Id: <201909010033.x810XGa9036904@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kevans set sender to kevans@FreeBSD.org using -f From: Kyle Evans Date: Sun, 1 Sep 2019 00:33:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351650 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: kevans X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 351650 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: 2.1.29 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: Sun, 01 Sep 2019 00:33:17 -0000 Author: kevans Date: Sun Sep 1 00:33:16 2019 New Revision: 351650 URL: https://svnweb.freebsd.org/changeset/base/351650 Log: posixshm: switch to OBJT_SWAP in advance of other changes Future changes to posixshm will start tracking writeable mappings in order to support file sealing. Tracking writeable mappings for an OBJT_DEFAULT object is complicated as it may be swapped out and converted to an OBJT_SWAP. One may generically add this tracking for vm_object, but this is difficult to do without increasing memory footprint of vm_object and blowing up memory usage by a significant amount. On the other hand, the swap pager can be expanded to track writeable mappings without increasing vm_object size. This change is currently in D21456. Switch over to OBJT_SWAP in advance of the other changes to the swap pager and posixshm. Modified: head/sys/kern/uipc_shm.c Modified: head/sys/kern/uipc_shm.c ============================================================================== --- head/sys/kern/uipc_shm.c Sat Aug 31 21:28:06 2019 (r351649) +++ head/sys/kern/uipc_shm.c Sun Sep 1 00:33:16 2019 (r351650) @@ -549,7 +549,7 @@ shm_alloc(struct ucred *ucred, mode_t mode) shmfd->shm_uid = ucred->cr_uid; shmfd->shm_gid = ucred->cr_gid; shmfd->shm_mode = mode; - shmfd->shm_object = vm_pager_allocate(OBJT_DEFAULT, NULL, + shmfd->shm_object = vm_pager_allocate(OBJT_SWAP, NULL, shmfd->shm_size, VM_PROT_DEFAULT, 0, ucred); KASSERT(shmfd->shm_object != NULL, ("shm_create: vm_pager_allocate")); shmfd->shm_object->pg_color = 0;