From owner-svn-src-head@FreeBSD.ORG Wed Jul 9 18:32:42 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CBB7E4C7; Wed, 9 Jul 2014 18:32:42 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::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 AC1212BC9; Wed, 9 Jul 2014 18:32:42 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.8/8.14.8) with ESMTP id s69IWgMp047513; Wed, 9 Jul 2014 18:32:42 GMT (envelope-from delphij@svn.freebsd.org) Received: (from delphij@localhost) by svn.freebsd.org (8.14.8/8.14.8/Submit) id s69IWfxd047502; Wed, 9 Jul 2014 18:32:41 GMT (envelope-from delphij@svn.freebsd.org) Message-Id: <201407091832.s69IWfxd047502@svn.freebsd.org> From: Xin LI Date: Wed, 9 Jul 2014 18:32:41 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r268464 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys X-SVN-Group: head 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: 2.1.18 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: Wed, 09 Jul 2014 18:32:43 -0000 Author: delphij Date: Wed Jul 9 18:32:40 2014 New Revision: 268464 URL: http://svnweb.freebsd.org/changeset/base/268464 Log: MFV r268452: Explicitly mark file removal transactions as "presumed to result in a net free of space" so they will not fail with ENOSPC. Illumos issue: 4950 files sometimes can't be removed from a full filesystem MFC after: 2 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_dir.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Directory Properties: head/sys/cddl/contrib/opensolaris/ (props changed) Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c Wed Jul 9 17:31:57 2014 (r268463) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c Wed Jul 9 18:32:40 2014 (r268464) @@ -672,6 +672,12 @@ dmu_free_long_range_impl(objset_t *os, d dmu_tx_t *tx = dmu_tx_create(os); dmu_tx_hold_free(tx, dn->dn_object, chunk_begin, chunk_end - chunk_begin); + + /* + * Mark this transaction as typically resulting in a net + * reduction in space used. + */ + dmu_tx_mark_netfree(tx); err = dmu_tx_assign(tx, TXG_WAIT); if (err) { dmu_tx_abort(tx); @@ -723,6 +729,7 @@ dmu_free_long_object(objset_t *os, uint6 tx = dmu_tx_create(os); dmu_tx_hold_bonus(tx, object); dmu_tx_hold_free(tx, object, 0, DMU_OBJECT_END); + dmu_tx_mark_netfree(tx); err = dmu_tx_assign(tx, TXG_WAIT); if (err == 0) { err = dmu_object_free(os, object, tx); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c Wed Jul 9 17:31:57 2014 (r268463) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c Wed Jul 9 18:32:40 2014 (r268464) @@ -21,7 +21,7 @@ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2011 Nexenta Systems, Inc. All rights reserved. - * Copyright (c) 2013 by Delphix. All rights reserved. + * Copyright (c) 2012, 2014 by Delphix. All rights reserved. */ #include @@ -583,6 +583,32 @@ dmu_tx_count_free(dmu_tx_hold_t *txh, ui txh->txh_space_tounref += unref; } +/* + * This function marks the transaction as being a "net free". The end + * result is that refquotas will be disabled for this transaction, and + * this transaction will be able to use half of the pool space overhead + * (see dsl_pool_adjustedsize()). Therefore this function should only + * be called for transactions that we expect will not cause a net increase + * in the amount of space used (but it's OK if that is occasionally not true). + */ +void +dmu_tx_mark_netfree(dmu_tx_t *tx) +{ + dmu_tx_hold_t *txh; + + txh = dmu_tx_hold_object_impl(tx, tx->tx_objset, + DMU_NEW_OBJECT, THT_FREE, 0, 0); + + /* + * Pretend that this operation will free 1GB of space. This + * should be large enough to cancel out the largest write. + * We don't want to use something like UINT64_MAX, because that would + * cause overflows when doing math with these values (e.g. in + * dmu_tx_try_assign()). + */ + txh->txh_space_tofree = txh->txh_space_tounref = 1024 * 1024 * 1024; +} + void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off, uint64_t len) { Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h Wed Jul 9 17:31:57 2014 (r268463) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h Wed Jul 9 18:32:40 2014 (r268464) @@ -569,6 +569,7 @@ void dmu_tx_abort(dmu_tx_t *tx); int dmu_tx_assign(dmu_tx_t *tx, enum txg_how txg_how); void dmu_tx_wait(dmu_tx_t *tx); void dmu_tx_commit(dmu_tx_t *tx); +void dmu_tx_mark_netfree(dmu_tx_t *tx); /* * To register a commit callback, dmu_tx_callback_register() must be called. Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_dir.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_dir.c Wed Jul 9 17:31:57 2014 (r268463) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_dir.c Wed Jul 9 18:32:40 2014 (r268464) @@ -20,7 +20,7 @@ */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2013 by Delphix. All rights reserved. + * Copyright (c) 2013, 2014 by Delphix. All rights reserved. */ #include @@ -559,6 +559,7 @@ zfs_purgedir(znode_t *dzp) dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); /* Is this really needed ? */ zfs_sa_upgrade_txholds(tx, xzp); + dmu_tx_mark_netfree(tx); error = dmu_tx_assign(tx, TXG_WAIT); if (error) { dmu_tx_abort(tx); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Wed Jul 9 17:31:57 2014 (r268463) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Wed Jul 9 18:32:40 2014 (r268464) @@ -20,7 +20,7 @@ */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2013 by Delphix. All rights reserved. + * Copyright (c) 2013, 2014 by Delphix. All rights reserved. * Copyright 2014 Nexenta Systems, Inc. All rights reserved. */ @@ -1568,7 +1568,7 @@ zfs_lookup(vnode_t *dvp, char *nm, vnode * cr - credentials of caller. * flag - large file flag [UNUSED]. * ct - caller context - * vsecp - ACL to be set + * vsecp - ACL to be set * * OUT: vpp - vnode of created or trunc'd entry. * @@ -1850,7 +1850,7 @@ zfs_remove(vnode_t *dvp, char *name, cre zfsvfs_t *zfsvfs = dzp->z_zfsvfs; zilog_t *zilog; uint64_t acl_obj, xattr_obj; - uint64_t xattr_obj_unlinked = 0; + uint64_t xattr_obj_unlinked = 0; uint64_t obj = 0; zfs_dirlock_t *dl; dmu_tx_t *tx; @@ -1950,6 +1950,14 @@ top: /* charge as an update -- would be nice not to charge at all */ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); + /* + * Mark this transaction as typically resulting in a net free of + * space, unless object removal will be delayed indefinitely + * (due to active holds on the vnode due to the file being open). + */ + if (may_delete_now) + dmu_tx_mark_netfree(tx); + error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); if (error) { zfs_dirent_unlock(dl); @@ -1980,7 +1988,6 @@ top: } if (unlinked) { - /* * Hold z_lock so that we can make sure that the ACL obj * hasn't changed. Could have been deleted due to @@ -5056,13 +5063,13 @@ zfs_addmap(vnode_t *vp, offset_t off, st * last page is pushed. The problem occurs when the msync() call is omitted, * which by far the most common case: * - * open() - * mmap() - * - * munmap() - * close() - *