bcache: Convert bucket_wait to wait_queue_head_t
At one point we did do fancy asynchronous waiting stuff with bucket_wait, but that's all gone (and bucket_wait is used a lot less than it used to be). So use the standard primitives. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet
Родитель
e8e1d4682c
Коммит
35fcd848d7
|
|
@ -339,7 +339,7 @@ static int bch_allocator_thread(void *arg)
|
|||
allocator_wait(ca, !fifo_full(&ca->free));
|
||||
|
||||
fifo_push(&ca->free, bucket);
|
||||
closure_wake_up(&ca->set->bucket_wait);
|
||||
wake_up(&ca->set->bucket_wait);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -365,16 +365,41 @@ static int bch_allocator_thread(void *arg)
|
|||
}
|
||||
}
|
||||
|
||||
long bch_bucket_alloc(struct cache *ca, unsigned watermark, struct closure *cl)
|
||||
long bch_bucket_alloc(struct cache *ca, unsigned watermark, bool wait)
|
||||
{
|
||||
long r = -1;
|
||||
again:
|
||||
DEFINE_WAIT(w);
|
||||
struct bucket *b;
|
||||
long r;
|
||||
|
||||
/* fastpath */
|
||||
if (fifo_used(&ca->free) > ca->watermark[watermark]) {
|
||||
fifo_pop(&ca->free, r);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!wait)
|
||||
return -1;
|
||||
|
||||
while (1) {
|
||||
if (fifo_used(&ca->free) > ca->watermark[watermark]) {
|
||||
fifo_pop(&ca->free, r);
|
||||
break;
|
||||
}
|
||||
|
||||
prepare_to_wait(&ca->set->bucket_wait, &w,
|
||||
TASK_UNINTERRUPTIBLE);
|
||||
|
||||
mutex_unlock(&ca->set->bucket_lock);
|
||||
schedule();
|
||||
mutex_lock(&ca->set->bucket_lock);
|
||||
}
|
||||
|
||||
finish_wait(&ca->set->bucket_wait, &w);
|
||||
out:
|
||||
wake_up_process(ca->alloc_thread);
|
||||
|
||||
if (fifo_used(&ca->free) > ca->watermark[watermark] &&
|
||||
fifo_pop(&ca->free, r)) {
|
||||
struct bucket *b = ca->buckets + r;
|
||||
#ifdef CONFIG_BCACHE_EDEBUG
|
||||
{
|
||||
size_t iter;
|
||||
long i;
|
||||
|
||||
|
|
@ -387,36 +412,23 @@ again:
|
|||
BUG_ON(i == r);
|
||||
fifo_for_each(i, &ca->unused, iter)
|
||||
BUG_ON(i == r);
|
||||
}
|
||||
#endif
|
||||
BUG_ON(atomic_read(&b->pin) != 1);
|
||||
b = ca->buckets + r;
|
||||
|
||||
SET_GC_SECTORS_USED(b, ca->sb.bucket_size);
|
||||
BUG_ON(atomic_read(&b->pin) != 1);
|
||||
|
||||
if (watermark <= WATERMARK_METADATA) {
|
||||
SET_GC_MARK(b, GC_MARK_METADATA);
|
||||
b->prio = BTREE_PRIO;
|
||||
} else {
|
||||
SET_GC_MARK(b, GC_MARK_RECLAIMABLE);
|
||||
b->prio = INITIAL_PRIO;
|
||||
}
|
||||
SET_GC_SECTORS_USED(b, ca->sb.bucket_size);
|
||||
|
||||
return r;
|
||||
if (watermark <= WATERMARK_METADATA) {
|
||||
SET_GC_MARK(b, GC_MARK_METADATA);
|
||||
b->prio = BTREE_PRIO;
|
||||
} else {
|
||||
SET_GC_MARK(b, GC_MARK_RECLAIMABLE);
|
||||
b->prio = INITIAL_PRIO;
|
||||
}
|
||||
|
||||
trace_bcache_alloc_fail(ca);
|
||||
|
||||
if (cl) {
|
||||
closure_wait(&ca->set->bucket_wait, cl);
|
||||
|
||||
if (closure_blocking(cl)) {
|
||||
mutex_unlock(&ca->set->bucket_lock);
|
||||
closure_sync(cl);
|
||||
mutex_lock(&ca->set->bucket_lock);
|
||||
goto again;
|
||||
}
|
||||
}
|
||||
|
||||
return -1;
|
||||
return r;
|
||||
}
|
||||
|
||||
void bch_bucket_free(struct cache_set *c, struct bkey *k)
|
||||
|
|
@ -433,7 +445,7 @@ void bch_bucket_free(struct cache_set *c, struct bkey *k)
|
|||
}
|
||||
|
||||
int __bch_bucket_alloc_set(struct cache_set *c, unsigned watermark,
|
||||
struct bkey *k, int n, struct closure *cl)
|
||||
struct bkey *k, int n, bool wait)
|
||||
{
|
||||
int i;
|
||||
|
||||
|
|
@ -446,7 +458,7 @@ int __bch_bucket_alloc_set(struct cache_set *c, unsigned watermark,
|
|||
|
||||
for (i = 0; i < n; i++) {
|
||||
struct cache *ca = c->cache_by_alloc[i];
|
||||
long b = bch_bucket_alloc(ca, watermark, cl);
|
||||
long b = bch_bucket_alloc(ca, watermark, wait);
|
||||
|
||||
if (b == -1)
|
||||
goto err;
|
||||
|
|
@ -466,11 +478,11 @@ err:
|
|||
}
|
||||
|
||||
int bch_bucket_alloc_set(struct cache_set *c, unsigned watermark,
|
||||
struct bkey *k, int n, struct closure *cl)
|
||||
struct bkey *k, int n, bool wait)
|
||||
{
|
||||
int ret;
|
||||
mutex_lock(&c->bucket_lock);
|
||||
ret = __bch_bucket_alloc_set(c, watermark, k, n, cl);
|
||||
ret = __bch_bucket_alloc_set(c, watermark, k, n, wait);
|
||||
mutex_unlock(&c->bucket_lock);
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -750,7 +750,7 @@ struct cache_set {
|
|||
* written.
|
||||
*/
|
||||
atomic_t prio_blocked;
|
||||
struct closure_waitlist bucket_wait;
|
||||
wait_queue_head_t bucket_wait;
|
||||
|
||||
/*
|
||||
* For any bio we don't skip we subtract the number of sectors from
|
||||
|
|
@ -1162,13 +1162,13 @@ uint8_t bch_inc_gen(struct cache *, struct bucket *);
|
|||
void bch_rescale_priorities(struct cache_set *, int);
|
||||
bool bch_bucket_add_unused(struct cache *, struct bucket *);
|
||||
|
||||
long bch_bucket_alloc(struct cache *, unsigned, struct closure *);
|
||||
long bch_bucket_alloc(struct cache *, unsigned, bool);
|
||||
void bch_bucket_free(struct cache_set *, struct bkey *);
|
||||
|
||||
int __bch_bucket_alloc_set(struct cache_set *, unsigned,
|
||||
struct bkey *, int, struct closure *);
|
||||
struct bkey *, int, bool);
|
||||
int bch_bucket_alloc_set(struct cache_set *, unsigned,
|
||||
struct bkey *, int, struct closure *);
|
||||
struct bkey *, int, bool);
|
||||
|
||||
__printf(2, 3)
|
||||
bool bch_cache_set_error(struct cache_set *, const char *, ...);
|
||||
|
|
|
|||
|
|
@ -813,7 +813,7 @@ static struct btree *mca_cannibalize(struct cache_set *c, struct bkey *k)
|
|||
* cannibalize_bucket() will take. This means every time we unlock the root of
|
||||
* the btree, we need to release this lock if we have it held.
|
||||
*/
|
||||
void bch_cannibalize_unlock(struct cache_set *c, struct closure *cl)
|
||||
void bch_cannibalize_unlock(struct cache_set *c)
|
||||
{
|
||||
if (c->try_harder == current) {
|
||||
bch_time_stats_update(&c->try_harder_time, c->try_harder_start);
|
||||
|
|
@ -995,15 +995,14 @@ static void btree_node_free(struct btree *b)
|
|||
mutex_unlock(&b->c->bucket_lock);
|
||||
}
|
||||
|
||||
struct btree *bch_btree_node_alloc(struct cache_set *c, int level,
|
||||
struct closure *cl)
|
||||
struct btree *bch_btree_node_alloc(struct cache_set *c, int level)
|
||||
{
|
||||
BKEY_PADDED(key) k;
|
||||
struct btree *b = ERR_PTR(-EAGAIN);
|
||||
|
||||
mutex_lock(&c->bucket_lock);
|
||||
retry:
|
||||
if (__bch_bucket_alloc_set(c, WATERMARK_METADATA, &k.key, 1, cl))
|
||||
if (__bch_bucket_alloc_set(c, WATERMARK_METADATA, &k.key, 1, true))
|
||||
goto err;
|
||||
|
||||
SET_KEY_SIZE(&k.key, c->btree_pages * PAGE_SECTORS);
|
||||
|
|
@ -1036,10 +1035,9 @@ err:
|
|||
return b;
|
||||
}
|
||||
|
||||
static struct btree *btree_node_alloc_replacement(struct btree *b,
|
||||
struct closure *cl)
|
||||
static struct btree *btree_node_alloc_replacement(struct btree *b)
|
||||
{
|
||||
struct btree *n = bch_btree_node_alloc(b->c, b->level, cl);
|
||||
struct btree *n = bch_btree_node_alloc(b->c, b->level);
|
||||
if (!IS_ERR_OR_NULL(n))
|
||||
bch_btree_sort_into(b, n);
|
||||
|
||||
|
|
@ -1152,7 +1150,7 @@ static struct btree *btree_gc_alloc(struct btree *b, struct bkey *k)
|
|||
* bch_bucket_alloc_set(), or we'd risk deadlock - so we don't pass it
|
||||
* our closure.
|
||||
*/
|
||||
struct btree *n = btree_node_alloc_replacement(b, NULL);
|
||||
struct btree *n = btree_node_alloc_replacement(b);
|
||||
|
||||
if (!IS_ERR_OR_NULL(n)) {
|
||||
swap(b, n);
|
||||
|
|
@ -1359,7 +1357,7 @@ static int bch_btree_gc_root(struct btree *b, struct btree_op *op,
|
|||
int ret = 0, stale = btree_gc_mark_node(b, &keys, gc);
|
||||
|
||||
if (b->level || stale > 10)
|
||||
n = btree_node_alloc_replacement(b, NULL);
|
||||
n = btree_node_alloc_replacement(b);
|
||||
|
||||
if (!IS_ERR_OR_NULL(n))
|
||||
swap(b, n);
|
||||
|
|
@ -1882,10 +1880,7 @@ static int btree_split(struct btree *b, struct btree_op *op,
|
|||
struct btree *n1, *n2 = NULL, *n3 = NULL;
|
||||
uint64_t start_time = local_clock();
|
||||
|
||||
if (b->level)
|
||||
set_closure_blocking(&op->cl);
|
||||
|
||||
n1 = btree_node_alloc_replacement(b, &op->cl);
|
||||
n1 = btree_node_alloc_replacement(b);
|
||||
if (IS_ERR(n1))
|
||||
goto err;
|
||||
|
||||
|
|
@ -1896,12 +1891,12 @@ static int btree_split(struct btree *b, struct btree_op *op,
|
|||
|
||||
trace_bcache_btree_node_split(b, n1->sets[0].data->keys);
|
||||
|
||||
n2 = bch_btree_node_alloc(b->c, b->level, &op->cl);
|
||||
n2 = bch_btree_node_alloc(b->c, b->level);
|
||||
if (IS_ERR(n2))
|
||||
goto err_free1;
|
||||
|
||||
if (!b->parent) {
|
||||
n3 = bch_btree_node_alloc(b->c, b->level + 1, &op->cl);
|
||||
n3 = bch_btree_node_alloc(b->c, b->level + 1);
|
||||
if (IS_ERR(n3))
|
||||
goto err_free2;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -355,7 +355,7 @@ static inline void rw_unlock(bool w, struct btree *b)
|
|||
_r = bch_btree_ ## fn(_b, op, ##__VA_ARGS__); \
|
||||
} \
|
||||
rw_unlock(_w, _b); \
|
||||
bch_cannibalize_unlock(c, &(op)->cl); \
|
||||
bch_cannibalize_unlock(c); \
|
||||
if (_r == -ENOSPC) { \
|
||||
wait_event((c)->try_wait, \
|
||||
!(c)->try_harder); \
|
||||
|
|
@ -377,9 +377,9 @@ static inline bool should_split(struct btree *b)
|
|||
void bch_btree_node_read(struct btree *);
|
||||
void bch_btree_node_write(struct btree *, struct closure *);
|
||||
|
||||
void bch_cannibalize_unlock(struct cache_set *, struct closure *);
|
||||
void bch_cannibalize_unlock(struct cache_set *);
|
||||
void bch_btree_set_root(struct btree *);
|
||||
struct btree *bch_btree_node_alloc(struct cache_set *, int, struct closure *);
|
||||
struct btree *bch_btree_node_alloc(struct cache_set *, int);
|
||||
struct btree *bch_btree_node_get(struct cache_set *, struct bkey *, int, bool);
|
||||
|
||||
int bch_btree_insert_check_key(struct btree *, struct btree_op *,
|
||||
|
|
|
|||
|
|
@ -350,14 +350,8 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
|
|||
struct cache_set *c = s->op.c;
|
||||
struct open_bucket *b;
|
||||
BKEY_PADDED(key) alloc;
|
||||
struct closure cl, *w = NULL;
|
||||
unsigned i;
|
||||
|
||||
if (s->writeback) {
|
||||
closure_init_stack(&cl);
|
||||
w = &cl;
|
||||
}
|
||||
|
||||
/*
|
||||
* We might have to allocate a new bucket, which we can't do with a
|
||||
* spinlock held. So if we have to allocate, we drop the lock, allocate
|
||||
|
|
@ -375,7 +369,8 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
|
|||
|
||||
spin_unlock(&c->data_bucket_lock);
|
||||
|
||||
if (bch_bucket_alloc_set(c, watermark, &alloc.key, 1, w))
|
||||
if (bch_bucket_alloc_set(c, watermark, &alloc.key,
|
||||
1, s->writeback))
|
||||
return false;
|
||||
|
||||
spin_lock(&c->data_bucket_lock);
|
||||
|
|
|
|||
|
|
@ -427,7 +427,7 @@ static int __uuid_write(struct cache_set *c)
|
|||
|
||||
lockdep_assert_held(&bch_register_lock);
|
||||
|
||||
if (bch_bucket_alloc_set(c, WATERMARK_METADATA, &k.key, 1, &cl))
|
||||
if (bch_bucket_alloc_set(c, WATERMARK_METADATA, &k.key, 1, true))
|
||||
return 1;
|
||||
|
||||
SET_KEY_SIZE(&k.key, c->sb.bucket_size);
|
||||
|
|
@ -565,7 +565,7 @@ void bch_prio_write(struct cache *ca)
|
|||
p->magic = pset_magic(ca);
|
||||
p->csum = bch_crc64(&p->magic, bucket_bytes(ca) - 8);
|
||||
|
||||
bucket = bch_bucket_alloc(ca, WATERMARK_PRIO, &cl);
|
||||
bucket = bch_bucket_alloc(ca, WATERMARK_PRIO, true);
|
||||
BUG_ON(bucket == -1);
|
||||
|
||||
mutex_unlock(&ca->set->bucket_lock);
|
||||
|
|
@ -1439,6 +1439,7 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)
|
|||
closure_init_unlocked(&c->sb_write);
|
||||
mutex_init(&c->bucket_lock);
|
||||
init_waitqueue_head(&c->try_wait);
|
||||
init_waitqueue_head(&c->bucket_wait);
|
||||
closure_init_unlocked(&c->uuid_write);
|
||||
spin_lock_init(&c->sort_time_lock);
|
||||
mutex_init(&c->sort_lock);
|
||||
|
|
@ -1608,7 +1609,7 @@ static void run_cache_set(struct cache_set *c)
|
|||
goto err_unlock_gc;
|
||||
|
||||
err = "cannot allocate new btree root";
|
||||
c->root = bch_btree_node_alloc(c, 0, &op.cl);
|
||||
c->root = bch_btree_node_alloc(c, 0);
|
||||
if (IS_ERR_OR_NULL(c->root))
|
||||
goto err_unlock_gc;
|
||||
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче