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d2734cce68
Details about the motivation of this feature and its usage can
be found in this blogpost:
https://sdimitro.github.io/post/zpool-checkpoint/
A lightning talk of this feature can be found here:
https://www.youtube.com/watch?v=fPQA8K40jAM
Implementation details can be found in big block comment of
spa_checkpoint.c
Side-changes that are relevant to this commit but not explained
elsewhere:
* renames members of "struct metaslab trees to be shorter without
losing meaning
* space_map_{alloc,truncate}() accept a block size as a
parameter. The reason is that in the current state all space
maps that we allocate through the DMU use a global tunable
(space_map_blksz) which defauls to 4KB. This is ok for metaslab
space maps in terms of bandwirdth since they are scattered all
over the disk. But for other space maps this default is probably
not what we want. Examples are device removal's vdev_obsolete_sm
or vdev_chedkpoint_sm from this review. Both of these have a
1:1 relationship with each vdev and could benefit from a bigger
block size.
Porting notes:
* The part of dsl_scan_sync() which handles async destroys has
been moved into the new dsl_process_async_destroys() function.
* Remove "VERIFY(!(flags & FWRITE))" in "kernel.c" so zhack can write
to block device backed pools.
* ZTS:
* Fix get_txg() in zpool_sync_001_pos due to "checkpoint_txg".
* Don't use large dd block sizes on /dev/urandom under Linux in
checkpoint_capacity.
* Adopt Delphix-OS's setting of 4 (spa_asize_inflation =
SPA_DVAS_PER_BP + 1) for the checkpoint_capacity test to speed
its attempts to fill the pool
* Create the base and nested pools with sync=disabled to speed up
the "setup" phase.
* Clear labels in test pool between checkpoint tests to avoid
duplicate pool issues.
* The import_rewind_device_replaced test has been marked as "known
to fail" for the reasons listed in its DISCLAIMER.
* New module parameters:
zfs_spa_discard_memory_limit,
zfs_remove_max_bytes_pause (not documented - debugging only)
vdev_max_ms_count (formerly metaslabs_per_vdev)
vdev_min_ms_count
Authored by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Richard Lowe <richlowe@richlowe.net>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
OpenZFS-issue: https://illumos.org/issues/9166
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8
Closes #7570
197 lines
6.1 KiB
C
197 lines
6.1 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) 2013, 2017 by Delphix. All rights reserved.
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* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
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*/
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#ifndef _SYS_DSL_POOL_H
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#define _SYS_DSL_POOL_H
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#include <sys/spa.h>
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#include <sys/txg.h>
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#include <sys/txg_impl.h>
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#include <sys/zfs_context.h>
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#include <sys/zio.h>
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#include <sys/dnode.h>
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#include <sys/ddt.h>
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#include <sys/arc.h>
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#include <sys/bpobj.h>
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#include <sys/bptree.h>
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#include <sys/rrwlock.h>
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#include <sys/dsl_synctask.h>
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#include <sys/mmp.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int zfs_txg_synctime_ms;
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struct objset;
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struct dsl_dir;
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struct dsl_dataset;
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struct dsl_pool;
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struct dmu_tx;
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struct dsl_scan;
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struct dsl_crypto_params;
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extern unsigned long zfs_dirty_data_max;
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extern unsigned long zfs_dirty_data_max_max;
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extern unsigned long zfs_dirty_data_sync;
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extern int zfs_dirty_data_max_percent;
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extern int zfs_dirty_data_max_max_percent;
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extern int zfs_delay_min_dirty_percent;
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extern unsigned long zfs_delay_scale;
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/* These macros are for indexing into the zfs_all_blkstats_t. */
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#define DMU_OT_DEFERRED DMU_OT_NONE
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#define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
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#define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
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typedef struct zfs_blkstat {
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uint64_t zb_count;
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uint64_t zb_asize;
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uint64_t zb_lsize;
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uint64_t zb_psize;
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uint64_t zb_gangs;
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uint64_t zb_ditto_2_of_2_samevdev;
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uint64_t zb_ditto_2_of_3_samevdev;
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uint64_t zb_ditto_3_of_3_samevdev;
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} zfs_blkstat_t;
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typedef struct zfs_all_blkstats {
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zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
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kmutex_t zab_lock;
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} zfs_all_blkstats_t;
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typedef struct dsl_pool {
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/* Immutable */
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spa_t *dp_spa;
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struct objset *dp_meta_objset;
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struct dsl_dir *dp_root_dir;
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struct dsl_dir *dp_mos_dir;
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struct dsl_dir *dp_free_dir;
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struct dsl_dir *dp_leak_dir;
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struct dsl_dataset *dp_origin_snap;
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uint64_t dp_root_dir_obj;
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struct taskq *dp_iput_taskq;
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/* No lock needed - sync context only */
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blkptr_t dp_meta_rootbp;
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uint64_t dp_tmp_userrefs_obj;
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bpobj_t dp_free_bpobj;
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uint64_t dp_bptree_obj;
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uint64_t dp_empty_bpobj;
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bpobj_t dp_obsolete_bpobj;
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struct dsl_scan *dp_scan;
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/* Uses dp_lock */
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kmutex_t dp_lock;
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kcondvar_t dp_spaceavail_cv;
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uint64_t dp_dirty_pertxg[TXG_SIZE];
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uint64_t dp_dirty_total;
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uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
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uint64_t dp_mos_used_delta;
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uint64_t dp_mos_compressed_delta;
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uint64_t dp_mos_uncompressed_delta;
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/*
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* Time of most recently scheduled (furthest in the future)
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* wakeup for delayed transactions.
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*/
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hrtime_t dp_last_wakeup;
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/* Has its own locking */
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tx_state_t dp_tx;
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txg_list_t dp_dirty_datasets;
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txg_list_t dp_dirty_zilogs;
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txg_list_t dp_dirty_dirs;
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txg_list_t dp_sync_tasks;
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txg_list_t dp_early_sync_tasks;
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taskq_t *dp_sync_taskq;
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taskq_t *dp_zil_clean_taskq;
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/*
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* Protects administrative changes (properties, namespace)
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*
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* It is only held for write in syncing context. Therefore
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* syncing context does not need to ever have it for read, since
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* nobody else could possibly have it for write.
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*/
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rrwlock_t dp_config_rwlock;
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zfs_all_blkstats_t *dp_blkstats;
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} dsl_pool_t;
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int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
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int dsl_pool_open(dsl_pool_t *dp);
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void dsl_pool_close(dsl_pool_t *dp);
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dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops,
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struct dsl_crypto_params *dcp, uint64_t txg);
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void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
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void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
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int dsl_pool_sync_context(dsl_pool_t *dp);
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uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy);
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uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp,
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zfs_space_check_t slop_policy);
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void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
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void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
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void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
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void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
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const blkptr_t *bpp);
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void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
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int64_t used, int64_t comp, int64_t uncomp);
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void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp,
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int64_t used, int64_t comp, int64_t uncomp);
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boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
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void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
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boolean_t dsl_pool_config_held(dsl_pool_t *dp);
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boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
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taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
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int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, uint64_t now, dmu_tx_t *tx);
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int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, dmu_tx_t *tx);
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void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
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int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
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int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
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void dsl_pool_rele(dsl_pool_t *dp, void *tag);
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void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_POOL_H */
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