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246e5883bb
When forced to resort to ganging, ZFS currently allocates three child blocks, each one third of the size of the original. This is true regardless of whether larger allocations could be made, which would allow us to have fewer gang leaves. This improves performance when fragmentation is high enough to require ganging, but not so high that all the free ranges are only just big enough to hold a third of the recordsize. This is also useful for improving the behavior of a future change to allow larger gang headers. We add the ability for the allocation codepath to allocate a range of sizes instead of a single fixed size. We then use this to pre-allocate the DVAs for the gang children. If those allocations fail, we fall back to the normal write path, which will likely re-gang. Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com> Co-authored-by: Paul Dagnelie <paul.dagnelie@klarasystems.com> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tony Hutter <hutter2@llnl.gov>
153 lines
5.8 KiB
C
153 lines
5.8 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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/*
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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 https://opensource.org/licenses/CDDL-1.0.
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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, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2017, Intel Corporation.
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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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const char *msop_name;
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uint64_t (*msop_alloc)(metaslab_t *, uint64_t, uint64_t, uint64_t *);
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} metaslab_ops_t;
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extern const 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_set_unflushed_dirty(metaslab_t *, boolean_t);
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void metaslab_set_unflushed_txg(metaslab_t *, uint64_t, dmu_tx_t *);
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void metaslab_set_estimated_condensed_size(metaslab_t *, uint64_t, dmu_tx_t *);
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boolean_t metaslab_unflushed_dirty(metaslab_t *);
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uint64_t metaslab_unflushed_txg(metaslab_t *);
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uint64_t metaslab_estimated_condensed_size(metaslab_t *);
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int metaslab_sort_by_flushed(const void *, const void *);
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void metaslab_unflushed_bump(metaslab_t *, dmu_tx_t *, boolean_t);
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uint64_t metaslab_unflushed_changes_memused(metaslab_t *);
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int metaslab_load(metaslab_t *);
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void metaslab_unload(metaslab_t *);
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boolean_t metaslab_flush(metaslab_t *, dmu_tx_t *);
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uint64_t metaslab_allocated_space(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_largest_allocatable(metaslab_t *);
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/*
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* metaslab alloc flags
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*/
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#define METASLAB_ZIL 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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int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t, blkptr_t *, int,
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uint64_t, blkptr_t *, int, zio_alloc_list_t *, int, const void *);
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int metaslab_alloc_range(spa_t *, metaslab_class_t *, uint64_t, uint64_t,
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blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *,
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int, const void *, uint64_t *);
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int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
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dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
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void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
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void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
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void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
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void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
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void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
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int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
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int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
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void metaslab_check_free(spa_t *, const blkptr_t *);
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void metaslab_stat_init(void);
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void metaslab_stat_fini(void);
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void metaslab_trace_move(zio_alloc_list_t *, zio_alloc_list_t *);
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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 *, const metaslab_ops_t *,
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boolean_t);
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void metaslab_class_destroy(metaslab_class_t *);
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void metaslab_class_validate(metaslab_class_t *);
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void metaslab_class_balance(metaslab_class_t *mc, boolean_t onsync);
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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, zio_t *,
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boolean_t, boolean_t *);
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boolean_t metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
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void metaslab_class_evict_old(metaslab_class_t *, uint64_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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void metaslab_space_update(vdev_t *, metaslab_class_t *,
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int64_t, int64_t, int64_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_increment_all(spa_t *, blkptr_t *, int, int,
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uint64_t, const void *);
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void metaslab_group_alloc_decrement(spa_t *, uint64_t, int, int, uint64_t,
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const void *);
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void metaslab_recalculate_weight_and_sort(metaslab_t *);
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void metaslab_disable(metaslab_t *);
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void metaslab_enable(metaslab_t *, boolean_t, boolean_t);
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void metaslab_set_selected_txg(metaslab_t *, uint64_t);
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extern int metaslab_debug_load;
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zfs_range_seg_type_t metaslab_calculate_range_tree_type(vdev_t *vdev,
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metaslab_t *msp, uint64_t *start, uint64_t *shift);
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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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