On Mon, Oct 12, 2015 at 03:44:44PM +0000, Alexander Motin wrote:
> Author: mav
> Date: Mon Oct 12 15:44:44 2015
> New Revision: 289191
> URL: https://svnweb.freebsd.org/changeset/base/289191
>
> Log:
> MFV r289187: 6251 add tunable to disable free_bpobj processing
Still need FreeBSD-specific code to control this tunable?
> Reviewed by: Matthew Ahrens <mahr...@delphix.com>
> Reviewed by: Prakash Surya <prakash.su...@delphix.com>
> Reviewed by: Simon Klinkert <simon.klink...@gmail.com>
> Reviewed by: Richard Elling <richard.ell...@richardelling.com>
> Reviewed by: Albert Lee <tr...@omniti.com>
> Reviewed by: Xin Li <delp...@freebsd.org>
> Approved by: Garrett D'Amore <garr...@damore.org>
> Author: George Wilson <george.wil...@delphix.com>
>
> illumos/illumos-gate@139510fb6efa97dbe5f5479594b308d940cab8d1
>
> Modified:
> head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
> Directory Properties:
> head/sys/cddl/contrib/opensolaris/ (props changed)
>
> Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
> ==============================================================================
> --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c Mon Oct
> 12 15:39:03 2015 (r289190)
> +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c Mon Oct
> 12 15:44:44 2015 (r289191)
> @@ -20,7 +20,7 @@
> */
> /*
> * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights
> reserved.
> - * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
> + * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
> */
>
> #include <sys/dsl_scan.h>
> @@ -102,6 +102,11 @@ SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, free_ma
>
> extern int zfs_txg_timeout;
>
> +/*
> + * Enable/disable the processing of the free_bpobj object.
> + */
> +boolean_t zfs_free_bpobj_enabled = B_TRUE;
> +
> /* the order has to match pool_scan_type */
> static scan_cb_t *scan_funcs[POOL_SCAN_FUNCS] = {
> NULL,
> @@ -1451,7 +1456,8 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *
> * have to worry about traversing it. It is also faster to free the
> * blocks than to scrub them.
> */
> - if (spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
> + if (zfs_free_bpobj_enabled &&
> + spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
> scn->scn_is_bptree = B_FALSE;
> scn->scn_zio_root = zio_root(dp->dp_spa, NULL,
> NULL, ZIO_FLAG_MUSTSUCCEED);
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