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4e21fd060a
This change introduces a new weighting algorithm to improve metaslab selection. The new weighting algorithm relies on the SPACEMAP_HISTOGRAM feature. As a result, the metaslab weight now encodes the type of weighting algorithm used (size-based vs segment-based). Porting Notes: The metaslab allocation tracing code is conditionally removed on linux (dependent on mdb debugger). Authored by: George Wilson <george.wilson@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Chris Siden <christopher.siden@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com> Reviewed by: Pavel Zakharov pavel.zakharov@delphix.com Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Don Brady <don.brady@intel.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Ported-by: Don Brady <don.brady@intel.com> OpenZFS-issue: https://www.illumos.org/issues/7303 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d5190931bd Closes #5404
115 lines
4.0 KiB
C
115 lines
4.0 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2016 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_METASLAB_H
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#define _SYS_METASLAB_H
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#include <sys/spa.h>
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#include <sys/space_map.h>
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#include <sys/txg.h>
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#include <sys/zio.h>
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#include <sys/avl.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct metaslab_ops {
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uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
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} metaslab_ops_t;
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extern metaslab_ops_t *zfs_metaslab_ops;
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int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
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metaslab_t **);
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void metaslab_fini(metaslab_t *);
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void metaslab_load_wait(metaslab_t *);
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int metaslab_load(metaslab_t *);
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void metaslab_unload(metaslab_t *);
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void metaslab_sync(metaslab_t *, uint64_t);
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void metaslab_sync_done(metaslab_t *, uint64_t);
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void metaslab_sync_reassess(metaslab_group_t *);
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uint64_t metaslab_block_maxsize(metaslab_t *);
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#define METASLAB_HINTBP_FAVOR 0x0
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#define METASLAB_HINTBP_AVOID 0x1
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#define METASLAB_GANG_HEADER 0x2
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#define METASLAB_GANG_CHILD 0x4
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#define METASLAB_ASYNC_ALLOC 0x8
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#define METASLAB_DONT_THROTTLE 0x10
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#define METASLAB_FASTWRITE 0x20
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int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
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blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *);
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void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
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int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
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void metaslab_check_free(spa_t *, const blkptr_t *);
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void metaslab_fastwrite_mark(spa_t *, const blkptr_t *);
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void metaslab_fastwrite_unmark(spa_t *, const blkptr_t *);
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void metaslab_alloc_trace_init(void);
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void metaslab_alloc_trace_fini(void);
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void metaslab_trace_init(zio_alloc_list_t *);
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void metaslab_trace_fini(zio_alloc_list_t *);
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metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
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void metaslab_class_destroy(metaslab_class_t *);
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int metaslab_class_validate(metaslab_class_t *);
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void metaslab_class_histogram_verify(metaslab_class_t *);
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uint64_t metaslab_class_fragmentation(metaslab_class_t *);
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uint64_t metaslab_class_expandable_space(metaslab_class_t *);
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boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
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zio_t *, int);
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void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
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void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
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int64_t, int64_t);
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uint64_t metaslab_class_get_alloc(metaslab_class_t *);
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uint64_t metaslab_class_get_space(metaslab_class_t *);
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uint64_t metaslab_class_get_dspace(metaslab_class_t *);
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uint64_t metaslab_class_get_deferred(metaslab_class_t *);
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metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
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void metaslab_group_destroy(metaslab_group_t *);
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void metaslab_group_activate(metaslab_group_t *);
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void metaslab_group_passivate(metaslab_group_t *);
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boolean_t metaslab_group_initialized(metaslab_group_t *);
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uint64_t metaslab_group_get_space(metaslab_group_t *);
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void metaslab_group_histogram_verify(metaslab_group_t *);
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uint64_t metaslab_group_fragmentation(metaslab_group_t *);
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void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
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void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
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void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_METASLAB_H */
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