| metaslab_impl.h (302408) | metaslab_impl.h (307277) |
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| 1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE --- 10 unchanged lines hidden (view full) --- 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26/* | 1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE --- 10 unchanged lines hidden (view full) --- 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26/* |
| 27 * Copyright (c) 2011, 2014 by Delphix. All rights reserved. | 27 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. |
| 28 */ 29 30#ifndef _SYS_METASLAB_IMPL_H 31#define _SYS_METASLAB_IMPL_H 32 33#include <sys/metaslab.h> 34#include <sys/space_map.h> 35#include <sys/range_tree.h> --- 18 unchanged lines hidden (view full) --- 54 * This rotor points to the next metaslab group where allocations will be 55 * attempted. Allocating a block is a 3 step process -- select the metaslab 56 * group, select the metaslab, and then allocate the block. The metaslab 57 * class defines the low-level block allocator that will be used as the 58 * final step in allocation. These allocators are pluggable allowing each class 59 * to use a block allocator that best suits that class. 60 */ 61struct metaslab_class { | 28 */ 29 30#ifndef _SYS_METASLAB_IMPL_H 31#define _SYS_METASLAB_IMPL_H 32 33#include <sys/metaslab.h> 34#include <sys/space_map.h> 35#include <sys/range_tree.h> --- 18 unchanged lines hidden (view full) --- 54 * This rotor points to the next metaslab group where allocations will be 55 * attempted. Allocating a block is a 3 step process -- select the metaslab 56 * group, select the metaslab, and then allocate the block. The metaslab 57 * class defines the low-level block allocator that will be used as the 58 * final step in allocation. These allocators are pluggable allowing each class 59 * to use a block allocator that best suits that class. 60 */ 61struct metaslab_class { |
| 62 kmutex_t mc_lock; |
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| 62 spa_t *mc_spa; 63 metaslab_group_t *mc_rotor; 64 metaslab_ops_t *mc_ops; 65 uint64_t mc_aliquot; | 63 spa_t *mc_spa; 64 metaslab_group_t *mc_rotor; 65 metaslab_ops_t *mc_ops; 66 uint64_t mc_aliquot; |
| 67 68 /* 69 * Track the number of metaslab groups that have been initialized 70 * and can accept allocations. An initialized metaslab group is 71 * one has been completely added to the config (i.e. we have 72 * updated the MOS config and the space has been added to the pool). 73 */ 74 uint64_t mc_groups; 75 76 /* 77 * Toggle to enable/disable the allocation throttle. 78 */ 79 boolean_t mc_alloc_throttle_enabled; 80 81 /* 82 * The allocation throttle works on a reservation system. Whenever 83 * an asynchronous zio wants to perform an allocation it must 84 * first reserve the number of blocks that it wants to allocate. 85 * If there aren't sufficient slots available for the pending zio 86 * then that I/O is throttled until more slots free up. The current 87 * number of reserved allocations is maintained by the mc_alloc_slots 88 * refcount. The mc_alloc_max_slots value determines the maximum 89 * number of allocations that the system allows. Gang blocks are 90 * allowed to reserve slots even if we've reached the maximum 91 * number of allocations allowed. 92 */ 93 uint64_t mc_alloc_max_slots; 94 refcount_t mc_alloc_slots; 95 |
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| 66 uint64_t mc_alloc_groups; /* # of allocatable groups */ | 96 uint64_t mc_alloc_groups; /* # of allocatable groups */ |
| 97 |
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| 67 uint64_t mc_alloc; /* total allocated space */ 68 uint64_t mc_deferred; /* total deferred frees */ 69 uint64_t mc_space; /* total space (alloc + free) */ 70 uint64_t mc_dspace; /* total deflated space */ 71 uint64_t mc_minblocksize; 72 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 73}; 74 --- 6 unchanged lines hidden (view full) --- 81 * simply find the next metaslab group in the linked list and attempt 82 * to allocate from that group instead. 83 */ 84struct metaslab_group { 85 kmutex_t mg_lock; 86 avl_tree_t mg_metaslab_tree; 87 uint64_t mg_aliquot; 88 boolean_t mg_allocatable; /* can we allocate? */ | 98 uint64_t mc_alloc; /* total allocated space */ 99 uint64_t mc_deferred; /* total deferred frees */ 100 uint64_t mc_space; /* total space (alloc + free) */ 101 uint64_t mc_dspace; /* total deflated space */ 102 uint64_t mc_minblocksize; 103 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 104}; 105 --- 6 unchanged lines hidden (view full) --- 112 * simply find the next metaslab group in the linked list and attempt 113 * to allocate from that group instead. 114 */ 115struct metaslab_group { 116 kmutex_t mg_lock; 117 avl_tree_t mg_metaslab_tree; 118 uint64_t mg_aliquot; 119 boolean_t mg_allocatable; /* can we allocate? */ |
| 120 121 /* 122 * A metaslab group is considered to be initialized only after 123 * we have updated the MOS config and added the space to the pool. 124 * We only allow allocation attempts to a metaslab group if it 125 * has been initialized. 126 */ 127 boolean_t mg_initialized; 128 |
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| 89 uint64_t mg_free_capacity; /* percentage free */ 90 int64_t mg_bias; 91 int64_t mg_activation_count; 92 metaslab_class_t *mg_class; 93 vdev_t *mg_vd; 94 taskq_t *mg_taskq; 95 metaslab_group_t *mg_prev; 96 metaslab_group_t *mg_next; | 129 uint64_t mg_free_capacity; /* percentage free */ 130 int64_t mg_bias; 131 int64_t mg_activation_count; 132 metaslab_class_t *mg_class; 133 vdev_t *mg_vd; 134 taskq_t *mg_taskq; 135 metaslab_group_t *mg_prev; 136 metaslab_group_t *mg_next; |
| 137 138 /* 139 * Each metaslab group can handle mg_max_alloc_queue_depth allocations 140 * which are tracked by mg_alloc_queue_depth. It's possible for a 141 * metaslab group to handle more allocations than its max. This 142 * can occur when gang blocks are required or when other groups 143 * are unable to handle their share of allocations. 144 */ 145 uint64_t mg_max_alloc_queue_depth; 146 refcount_t mg_alloc_queue_depth; 147 148 /* 149 * A metalab group that can no longer allocate the minimum block 150 * size will set mg_no_free_space. Once a metaslab group is out 151 * of space then its share of work must be distributed to other 152 * groups. 153 */ 154 boolean_t mg_no_free_space; 155 156 uint64_t mg_allocations; 157 uint64_t mg_failed_allocations; |
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| 97 uint64_t mg_fragmentation; 98 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 99}; 100 101/* 102 * This value defines the number of elements in the ms_lbas array. The value 103 * of 64 was chosen as it covers all power of 2 buckets up to UINT64_MAX. 104 * This is the equivalent of highbit(UINT64_MAX). --- 98 unchanged lines hidden --- | 158 uint64_t mg_fragmentation; 159 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 160}; 161 162/* 163 * This value defines the number of elements in the ms_lbas array. The value 164 * of 64 was chosen as it covers all power of 2 buckets up to UINT64_MAX. 165 * This is the equivalent of highbit(UINT64_MAX). --- 98 unchanged lines hidden --- |