Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_synctask.c @ 11823:c756cd80d532
6930022 zfs rename of non-shapshot is slower than necessary
| author | Matthew Ahrens <Matthew.Ahrens@Sun.COM> |
|---|---|
| date | Thu, 25 Feb 2010 14:08:36 -0800 |
| parents | 9195ca3173d2 |
| children | 7cf402a7f374 |
| rev | line source |
|---|---|
| 2199 | 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 | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
|
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22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
| 2199 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #include <sys/dmu.h> | |
| 27 #include <sys/dmu_tx.h> | |
| 28 #include <sys/dsl_pool.h> | |
| 29 #include <sys/dsl_dir.h> | |
| 30 #include <sys/dsl_synctask.h> | |
|
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31 #include <sys/metaslab.h> |
| 4543 | 32 #include <sys/cred.h> |
| 2199 | 33 |
| 34 #define DST_AVG_BLKSHIFT 14 | |
| 35 | |
| 36 /* ARGSUSED */ | |
| 37 static int | |
| 38 dsl_null_checkfunc(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 39 { | |
| 40 return (0); | |
| 41 } | |
| 42 | |
| 43 dsl_sync_task_group_t * | |
| 44 dsl_sync_task_group_create(dsl_pool_t *dp) | |
| 45 { | |
| 46 dsl_sync_task_group_t *dstg; | |
| 47 | |
| 48 dstg = kmem_zalloc(sizeof (dsl_sync_task_group_t), KM_SLEEP); | |
| 49 list_create(&dstg->dstg_tasks, sizeof (dsl_sync_task_t), | |
| 50 offsetof(dsl_sync_task_t, dst_node)); | |
| 51 dstg->dstg_pool = dp; | |
| 4577 | 52 dstg->dstg_cr = CRED(); |
| 2199 | 53 |
| 54 return (dstg); | |
| 55 } | |
| 56 | |
| 57 void | |
| 58 dsl_sync_task_create(dsl_sync_task_group_t *dstg, | |
| 59 dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc, | |
| 60 void *arg1, void *arg2, int blocks_modified) | |
| 61 { | |
| 62 dsl_sync_task_t *dst; | |
| 63 | |
| 64 if (checkfunc == NULL) | |
| 65 checkfunc = dsl_null_checkfunc; | |
| 66 dst = kmem_zalloc(sizeof (dsl_sync_task_t), KM_SLEEP); | |
| 67 dst->dst_checkfunc = checkfunc; | |
| 68 dst->dst_syncfunc = syncfunc; | |
| 69 dst->dst_arg1 = arg1; | |
| 70 dst->dst_arg2 = arg2; | |
| 71 list_insert_tail(&dstg->dstg_tasks, dst); | |
| 72 | |
| 73 dstg->dstg_space += blocks_modified << DST_AVG_BLKSHIFT; | |
| 74 } | |
| 75 | |
| 76 int | |
| 77 dsl_sync_task_group_wait(dsl_sync_task_group_t *dstg) | |
| 78 { | |
| 79 dmu_tx_t *tx; | |
| 80 uint64_t txg; | |
| 81 dsl_sync_task_t *dst; | |
| 82 | |
| 83 top: | |
| 84 tx = dmu_tx_create_dd(dstg->dstg_pool->dp_mos_dir); | |
| 85 VERIFY(0 == dmu_tx_assign(tx, TXG_WAIT)); | |
| 86 | |
| 87 txg = dmu_tx_get_txg(tx); | |
| 88 | |
| 89 /* Do a preliminary error check. */ | |
| 90 dstg->dstg_err = 0; | |
| 91 rw_enter(&dstg->dstg_pool->dp_config_rwlock, RW_READER); | |
| 92 for (dst = list_head(&dstg->dstg_tasks); dst; | |
| 93 dst = list_next(&dstg->dstg_tasks, dst)) { | |
| 94 #ifdef ZFS_DEBUG | |
| 95 /* | |
| 96 * Only check half the time, otherwise, the sync-context | |
| 97 * check will almost never fail. | |
| 98 */ | |
| 99 if (spa_get_random(2) == 0) | |
| 100 continue; | |
| 101 #endif | |
| 102 dst->dst_err = | |
| 103 dst->dst_checkfunc(dst->dst_arg1, dst->dst_arg2, tx); | |
| 104 if (dst->dst_err) | |
| 105 dstg->dstg_err = dst->dst_err; | |
| 106 } | |
| 107 rw_exit(&dstg->dstg_pool->dp_config_rwlock); | |
| 108 | |
| 109 if (dstg->dstg_err) { | |
| 110 dmu_tx_commit(tx); | |
| 111 return (dstg->dstg_err); | |
| 112 } | |
| 113 | |
|
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114 /* |
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115 * We don't generally have many sync tasks, so pay the price of |
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116 * add_tail to get the tasks executed in the right order. |
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117 */ |
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118 VERIFY(0 == txg_list_add_tail(&dstg->dstg_pool->dp_sync_tasks, |
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119 dstg, txg)); |
| 2199 | 120 |
| 121 dmu_tx_commit(tx); | |
| 122 | |
| 123 txg_wait_synced(dstg->dstg_pool, txg); | |
| 124 | |
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125 if (dstg->dstg_err == EAGAIN) { |
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126 txg_wait_synced(dstg->dstg_pool, txg + TXG_DEFER_SIZE); |
| 2199 | 127 goto top; |
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128 } |
| 2199 | 129 |
| 130 return (dstg->dstg_err); | |
| 131 } | |
| 132 | |
| 133 void | |
| 4577 | 134 dsl_sync_task_group_nowait(dsl_sync_task_group_t *dstg, dmu_tx_t *tx) |
| 135 { | |
| 136 uint64_t txg; | |
| 137 | |
| 138 dstg->dstg_nowaiter = B_TRUE; | |
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139 dstg->dstg_cr = NULL; /* it won't be valid by the time we sync */ |
| 4577 | 140 txg = dmu_tx_get_txg(tx); |
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11816
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6928246 spa_history_log should use dsl_sync_task_do_nowait
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
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141 /* |
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a30797f77200
6928246 spa_history_log should use dsl_sync_task_do_nowait
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
10922
diff
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142 * We don't generally have many sync tasks, so pay the price of |
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a30797f77200
6928246 spa_history_log should use dsl_sync_task_do_nowait
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
10922
diff
changeset
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143 * add_tail to get the tasks executed in the right order. |
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a30797f77200
6928246 spa_history_log should use dsl_sync_task_do_nowait
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
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144 */ |
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a30797f77200
6928246 spa_history_log should use dsl_sync_task_do_nowait
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
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145 VERIFY(0 == txg_list_add_tail(&dstg->dstg_pool->dp_sync_tasks, |
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146 dstg, txg)); |
| 4577 | 147 } |
| 148 | |
| 149 void | |
| 2199 | 150 dsl_sync_task_group_destroy(dsl_sync_task_group_t *dstg) |
| 151 { | |
| 152 dsl_sync_task_t *dst; | |
| 153 | |
| 154 while (dst = list_head(&dstg->dstg_tasks)) { | |
| 155 list_remove(&dstg->dstg_tasks, dst); | |
| 156 kmem_free(dst, sizeof (dsl_sync_task_t)); | |
| 157 } | |
| 158 kmem_free(dstg, sizeof (dsl_sync_task_group_t)); | |
| 159 } | |
| 160 | |
| 161 void | |
| 162 dsl_sync_task_group_sync(dsl_sync_task_group_t *dstg, dmu_tx_t *tx) | |
| 163 { | |
| 164 dsl_sync_task_t *dst; | |
|
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165 dsl_pool_t *dp = dstg->dstg_pool; |
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166 uint64_t quota, used; |
| 2199 | 167 |
| 168 ASSERT3U(dstg->dstg_err, ==, 0); | |
| 169 | |
| 170 /* | |
|
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171 * Check for sufficient space. We just check against what's |
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172 * on-disk; we don't want any in-flight accounting to get in our |
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173 * way, because open context may have already used up various |
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174 * in-core limits (arc_tempreserve, dsl_pool_tempreserve). |
| 2199 | 175 */ |
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176 quota = dsl_pool_adjustedsize(dp, B_FALSE) - |
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177 metaslab_class_get_deferred(spa_normal_class(dp->dp_spa)); |
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178 used = dp->dp_root_dir->dd_phys->dd_used_bytes; |
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179 /* MOS space is triple-dittoed, so we multiply by 3. */ |
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180 if (dstg->dstg_space > 0 && used + dstg->dstg_space * 3 > quota) { |
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181 dstg->dstg_err = ENOSPC; |
| 2199 | 182 return; |
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183 } |
| 2199 | 184 |
| 185 /* | |
| 186 * Check for errors by calling checkfuncs. | |
| 187 */ | |
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188 rw_enter(&dp->dp_config_rwlock, RW_WRITER); |
| 2199 | 189 for (dst = list_head(&dstg->dstg_tasks); dst; |
| 190 dst = list_next(&dstg->dstg_tasks, dst)) { | |
| 191 dst->dst_err = | |
| 192 dst->dst_checkfunc(dst->dst_arg1, dst->dst_arg2, tx); | |
| 193 if (dst->dst_err) | |
| 194 dstg->dstg_err = dst->dst_err; | |
| 195 } | |
| 196 | |
| 197 if (dstg->dstg_err == 0) { | |
| 198 /* | |
| 199 * Execute sync tasks. | |
| 200 */ | |
| 201 for (dst = list_head(&dstg->dstg_tasks); dst; | |
| 202 dst = list_next(&dstg->dstg_tasks, dst)) { | |
| 4543 | 203 dst->dst_syncfunc(dst->dst_arg1, dst->dst_arg2, |
| 4577 | 204 dstg->dstg_cr, tx); |
| 2199 | 205 } |
| 206 } | |
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207 rw_exit(&dp->dp_config_rwlock); |
| 4577 | 208 |
| 209 if (dstg->dstg_nowaiter) | |
| 210 dsl_sync_task_group_destroy(dstg); | |
| 2199 | 211 } |
| 212 | |
| 213 int | |
| 214 dsl_sync_task_do(dsl_pool_t *dp, | |
| 215 dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc, | |
| 216 void *arg1, void *arg2, int blocks_modified) | |
| 217 { | |
| 218 dsl_sync_task_group_t *dstg; | |
| 219 int err; | |
| 220 | |
| 221 dstg = dsl_sync_task_group_create(dp); | |
| 222 dsl_sync_task_create(dstg, checkfunc, syncfunc, | |
| 223 arg1, arg2, blocks_modified); | |
| 224 err = dsl_sync_task_group_wait(dstg); | |
| 225 dsl_sync_task_group_destroy(dstg); | |
| 226 return (err); | |
| 227 } | |
| 4577 | 228 |
| 229 void | |
| 230 dsl_sync_task_do_nowait(dsl_pool_t *dp, | |
| 231 dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc, | |
| 232 void *arg1, void *arg2, int blocks_modified, dmu_tx_t *tx) | |
| 233 { | |
| 234 dsl_sync_task_group_t *dstg; | |
| 235 | |
| 236 dstg = dsl_sync_task_group_create(dp); | |
| 237 dsl_sync_task_create(dstg, checkfunc, syncfunc, | |
| 238 arg1, arg2, blocks_modified); | |
| 239 dsl_sync_task_group_nowait(dstg, tx); | |
| 240 } |