-#ifndef _BCACHE_ALLOC_TYPES_H
-#define _BCACHE_ALLOC_TYPES_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_ALLOC_TYPES_H
+#define _BCACHEFS_ALLOC_TYPES_H
#include <linux/mutex.h>
+#include <linux/spinlock.h>
#include "clock_types.h"
+#include "fifo.h"
+
+struct bucket_alloc_state {
+ u64 buckets_seen;
+ u64 skipped_open;
+ u64 skipped_need_journal_commit;
+ u64 skipped_nocow;
+ u64 skipped_nouse;
+};
-/*
- * There's two of these clocks, one for reads and one for writes:
- *
- * All fields protected by bucket_lock
- */
-struct prio_clock {
- /*
- * "now" in (read/write) IO time - incremented whenever we do X amount
- * of reads or writes.
- *
- * Goes with the bucket read/write prios: when we read or write to a
- * bucket we reset the bucket's prio to the current hand; thus hand -
- * prio = time since bucket was last read/written.
- *
- * The units are some amount (bytes/sectors) of data read/written, and
- * the units can change on the fly if we need to rescale to fit
- * everything in a u16 - your only guarantee is that the units are
- * consistent.
- */
- u16 hand;
- u16 min_prio;
-
- int rw;
+struct ec_bucket_buf;
- struct io_timer rescale;
-};
+#define BCH_ALLOC_RESERVES() \
+ x(btree_movinggc) \
+ x(btree) \
+ x(movinggc) \
+ x(none) \
+ x(stripe)
-/* There is one reserve for each type of btree, one for prios and gens
- * and one for moving GC */
enum alloc_reserve {
- RESERVE_ALLOC = -1,
- RESERVE_BTREE = 0,
- RESERVE_MOVINGGC = 1,
- RESERVE_NONE = 2,
- RESERVE_NR = 3,
+#define x(name) RESERVE_##name,
+ BCH_ALLOC_RESERVES()
+#undef x
+ RESERVE_NR,
};
-struct dev_group {
- spinlock_t lock;
- unsigned nr;
- unsigned cur_device;
- struct {
- u64 weight;
- struct bch_dev *dev;
- } d[BCH_SB_MEMBERS_MAX];
-};
+#define OPEN_BUCKETS_COUNT 1024
-/* Enough for 16 cache devices, 2 tiers and some left over for pipelining */
-#define OPEN_BUCKETS_COUNT 256
+#define WRITE_POINT_HASH_NR 32
+#define WRITE_POINT_MAX 32
-#define WRITE_POINT_COUNT 16
+/*
+ * 0 is never a valid open_bucket_idx_t:
+ */
+typedef u16 open_bucket_idx_t;
struct open_bucket {
- struct list_head list;
- struct mutex lock;
+ spinlock_t lock;
atomic_t pin;
- bool has_full_ptrs;
+ open_bucket_idx_t freelist;
+ open_bucket_idx_t hash;
+
/*
- * recalculated every time we allocate from this open_bucket based on
- * how many pointers we're actually going to use:
+ * When an open bucket has an ec_stripe attached, this is the index of
+ * the block in the stripe this open_bucket corresponds to:
*/
- unsigned sectors_free;
- unsigned nr_ptrs;
- struct bch_extent_ptr ptrs[BCH_REPLICAS_MAX];
- unsigned ptr_offset[BCH_REPLICAS_MAX];
+ u8 ec_idx;
+ enum bch_data_type data_type:6;
+ unsigned valid:1;
+ unsigned on_partial_list:1;
+
+ u8 dev;
+ u8 gen;
+ u32 sectors_free;
+ u64 bucket;
+ struct ec_stripe_new *ec;
};
-struct write_point {
- struct open_bucket *b;
+#define OPEN_BUCKET_LIST_MAX 15
- /*
- * Throttle writes to this write point if tier 0 is full?
- */
- bool throttle;
+struct open_buckets {
+ open_bucket_idx_t nr;
+ open_bucket_idx_t v[OPEN_BUCKET_LIST_MAX];
+};
- /*
- * If not NULL, cache group for tiering, promotion and moving GC -
- * always allocates a single replica
- */
- struct dev_group *group;
+struct dev_stripe_state {
+ u64 next_alloc[BCH_SB_MEMBERS_MAX];
+};
- /*
- * Otherwise do a normal replicated bucket allocation that could come
- * from any device in tier 0 (foreground write)
- */
+#define WRITE_POINT_STATES() \
+ x(stopped) \
+ x(waiting_io) \
+ x(waiting_work) \
+ x(running)
+
+enum write_point_state {
+#define x(n) WRITE_POINT_##n,
+ WRITE_POINT_STATES()
+#undef x
+ WRITE_POINT_STATE_NR
};
-struct alloc_heap_entry {
- size_t bucket;
- unsigned long key;
+struct write_point {
+ struct {
+ struct hlist_node node;
+ struct mutex lock;
+ u64 last_used;
+ unsigned long write_point;
+ enum bch_data_type data_type;
+
+ /* calculated based on how many pointers we're actually going to use: */
+ unsigned sectors_free;
+
+ struct open_buckets ptrs;
+ struct dev_stripe_state stripe;
+
+ u64 sectors_allocated;
+ } __attribute__((__aligned__(SMP_CACHE_BYTES)));
+
+ struct {
+ struct work_struct index_update_work;
+
+ struct list_head writes;
+ spinlock_t writes_lock;
+
+ enum write_point_state state;
+ u64 last_state_change;
+ u64 time[WRITE_POINT_STATE_NR];
+ } __attribute__((__aligned__(SMP_CACHE_BYTES)));
};
-typedef HEAP(struct alloc_heap_entry) alloc_heap;
+struct write_point_specifier {
+ unsigned long v;
+};
-#endif /* _BCACHE_ALLOC_TYPES_H */
+#endif /* _BCACHEFS_ALLOC_TYPES_H */
projects / bcachefs-tools-debian / blobdiff