*/
/*
- * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2019 by Delphix. All rights reserved.
*/
#ifndef _SYS_METASLAB_IMPL_H
#include <sys/vdev.h>
#include <sys/txg.h>
#include <sys/avl.h>
+#include <sys/multilist.h>
#ifdef __cplusplus
extern "C" {
TRACE_ENOSPC = -6ULL,
TRACE_CONDENSING = -7ULL,
TRACE_VDEV_ERROR = -8ULL,
- TRACE_INITIALIZING = -9ULL
+ TRACE_DISABLED = -9ULL,
} trace_alloc_type_t;
#define METASLAB_WEIGHT_PRIMARY (1ULL << 63)
uint64_t mc_space; /* total space (alloc + free) */
uint64_t mc_dspace; /* total deflated space */
uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE];
+
+ /*
+ * List of all loaded metaslabs in the class, sorted in order of most
+ * recent use.
+ */
+ multilist_t *mc_metaslab_txg_list;
};
+/*
+ * Per-allocator data structure.
+ */
+typedef struct metaslab_group_allocator {
+ uint64_t mga_cur_max_alloc_queue_depth;
+ zfs_refcount_t mga_alloc_queue_depth;
+ metaslab_t *mga_primary;
+ metaslab_t *mga_secondary;
+} metaslab_group_allocator_t;
+
/*
* Metaslab groups encapsulate all the allocatable regions (i.e. metaslabs)
* of a top-level vdev. They are linked together to form a circular linked
*/
struct metaslab_group {
kmutex_t mg_lock;
- metaslab_t **mg_primaries;
- metaslab_t **mg_secondaries;
avl_tree_t mg_metaslab_tree;
uint64_t mg_aliquot;
boolean_t mg_allocatable; /* can we allocate? */
* groups are unable to handle their share of allocations.
*/
uint64_t mg_max_alloc_queue_depth;
- uint64_t *mg_cur_max_alloc_queue_depth;
- zfs_refcount_t *mg_alloc_queue_depth;
int mg_allocators;
+ metaslab_group_allocator_t *mg_allocator; /* array */
/*
* A metalab group that can no longer allocate the minimum block
* size will set mg_no_free_space. Once a metaslab group is out
uint64_t mg_fragmentation;
uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
- int mg_ms_initializing;
- boolean_t mg_initialize_updating;
- kmutex_t mg_ms_initialize_lock;
- kcondvar_t mg_ms_initialize_cv;
+ int mg_ms_disabled;
+ boolean_t mg_disabled_updating;
+ kmutex_t mg_ms_disabled_lock;
+ kcondvar_t mg_ms_disabled_cv;
};
/*
* write to metaslab data on-disk (i.e flushing entries to
* the metaslab's space map). It helps coordinate readers of
* the metaslab's space map [see spa_vdev_remove_thread()]
- * with writers [see metaslab_sync()].
+ * with writers [see metaslab_sync() or metaslab_flush()].
*
* Note that metaslab_load(), even though a reader, uses
* a completely different mechanism to deal with the reading
range_tree_t *ms_allocating[TXG_SIZE];
range_tree_t *ms_allocatable;
uint64_t ms_allocated_this_txg;
+ uint64_t ms_allocating_total;
/*
* The following range trees are accessed only from syncing context.
range_tree_t *ms_defer[TXG_DEFER_SIZE];
range_tree_t *ms_checkpointing; /* to add to the checkpoint */
+ /*
+ * The ms_trim tree is the set of allocatable segments which are
+ * eligible for trimming. (When the metaslab is loaded, it's a
+ * subset of ms_allocatable.) It's kept in-core as long as the
+ * autotrim property is set and is not vacated when the metaslab
+ * is unloaded. Its purpose is to aggregate freed ranges to
+ * facilitate efficient trimming.
+ */
+ range_tree_t *ms_trim;
+
boolean_t ms_condensing; /* condensing? */
boolean_t ms_condense_wanted;
- uint64_t ms_condense_checked_txg;
- uint64_t ms_initializing; /* leaves initializing this ms */
+ /*
+ * The number of consumers which have disabled the metaslab.
+ */
+ uint64_t ms_disabled;
/*
* We must always hold the ms_lock when modifying ms_loaded
*/
boolean_t ms_loaded;
boolean_t ms_loading;
+ kcondvar_t ms_flush_cv;
+ boolean_t ms_flushing;
/*
* The following histograms count entries that are in the
* stay cached.
*/
uint64_t ms_selected_txg;
+ /*
+ * ms_load/unload_time can be used for performance monitoring
+ * (e.g. by dtrace or mdb).
+ */
+ hrtime_t ms_load_time; /* time last loaded */
+ hrtime_t ms_unload_time; /* time last unloaded */
+ hrtime_t ms_selected_time; /* time last allocated from */
uint64_t ms_alloc_txg; /* last successful alloc (debug only) */
uint64_t ms_max_size; /* maximum allocatable size */
* only difference is that the ms_allocatable_by_size is ordered by
* segment sizes.
*/
- avl_tree_t ms_allocatable_by_size;
+ zfs_btree_t ms_allocatable_by_size;
+ zfs_btree_t ms_unflushed_frees_by_size;
uint64_t ms_lbas[MAX_LBAS];
metaslab_group_t *ms_group; /* metaslab group */
avl_node_t ms_group_node; /* node in metaslab group tree */
txg_node_t ms_txg_node; /* per-txg dirty metaslab links */
+ avl_node_t ms_spa_txg_node; /* node in spa_metaslabs_by_txg */
+ /*
+ * Node in metaslab class's selected txg list
+ */
+ multilist_node_t ms_class_txg_node;
+
+ /*
+ * Allocs and frees that are committed to the vdev log spacemap but
+ * not yet to this metaslab's spacemap.
+ */
+ range_tree_t *ms_unflushed_allocs;
+ range_tree_t *ms_unflushed_frees;
+
+ /*
+ * We have flushed entries up to but not including this TXG. In
+ * other words, all changes from this TXG and onward should not
+ * be in this metaslab's space map and must be read from the
+ * log space maps.
+ */
+ uint64_t ms_unflushed_txg;
/* updated every time we are done syncing the metaslab's space map */
uint64_t ms_synced_length;
boolean_t ms_new;
};
+typedef struct metaslab_unflushed_phys {
+ /* on-disk counterpart of ms_unflushed_txg */
+ uint64_t msp_unflushed_txg;
+} metaslab_unflushed_phys_t;
+
#ifdef __cplusplus
}
#endif
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