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bcachefs: fs_usage_u64s()

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-02-14 20:39:17 -05:00 committed by Kent Overstreet
parent 768ac63924
commit ecf37a4a80
5 changed files with 48 additions and 55 deletions
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9
fs/bcachefs/btree_gc.c
View File

@ -605,8 +605,7 @@ static void bch2_gc_done(struct bch_fs *c, bool initial)
}
{
unsigned nr = sizeof(struct bch_fs_usage) / sizeof(u64) +
c->replicas.nr;
unsigned nr = fs_usage_u64s(c);
struct bch_fs_usage *dst = (void *)
bch2_acc_percpu_u64s((void *) c->usage[0], nr);
struct bch_fs_usage *src = (void *)
@ -657,10 +656,8 @@ static int bch2_gc_start(struct bch_fs *c)
BUG_ON(c->usage[1]);
c->usage[1] = __alloc_percpu_gfp(sizeof(struct bch_fs_usage) +
sizeof(u64) * c->replicas.nr,
sizeof(u64),
GFP_KERNEL);
c->usage[1] = __alloc_percpu_gfp(fs_usage_u64s(c) * sizeof(u64),
sizeof(u64), GFP_KERNEL);
percpu_up_write(&c->mark_lock);
if (!c->usage[1])

22
fs/bcachefs/buckets.c
View File

@ -117,11 +117,11 @@ void bch2_bucket_seq_cleanup(struct bch_fs *c)
void bch2_fs_usage_initialize(struct bch_fs *c)
{
struct bch_fs_usage *usage;
unsigned i, nr;
unsigned i;
percpu_down_write(&c->mark_lock);
nr = sizeof(struct bch_fs_usage) / sizeof(u64) + c->replicas.nr;
usage = (void *) bch2_acc_percpu_u64s((void *) c->usage[0], nr);
usage = (void *) bch2_acc_percpu_u64s((void *) c->usage[0],
fs_usage_u64s(c));
for (i = 0; i < BCH_REPLICAS_MAX; i++)
usage->reserved += usage->persistent_reserved[i];
@ -159,24 +159,23 @@ struct bch_dev_usage bch2_dev_usage_read(struct bch_fs *c, struct bch_dev *ca)
struct bch_fs_usage *bch2_fs_usage_read(struct bch_fs *c)
{
struct bch_fs_usage *ret;
unsigned nr = READ_ONCE(c->replicas.nr);
unsigned v, u64s = fs_usage_u64s(c);
retry:
ret = kzalloc(sizeof(*ret) + nr * sizeof(u64), GFP_NOFS);
ret = kzalloc(u64s * sizeof(u64), GFP_NOFS);
if (unlikely(!ret))
return NULL;
percpu_down_read(&c->mark_lock);
if (unlikely(nr < c->replicas.nr)) {
nr = c->replicas.nr;
v = fs_usage_u64s(c);
if (unlikely(u64s != v)) {
u64s = v;
percpu_up_read(&c->mark_lock);
kfree(ret);
goto retry;
}
acc_u64s_percpu((u64 *) ret,
(u64 __percpu *) c->usage[0],
sizeof(*ret) / sizeof(u64) + nr);
acc_u64s_percpu((u64 *) ret, (u64 __percpu *) c->usage[0], u64s);
return ret;
}
@ -294,8 +293,7 @@ int bch2_fs_usage_apply(struct bch_fs *c,
preempt_disable();
acc_u64s((u64 *) this_cpu_ptr(c->usage[0]),
(u64 *) fs_usage,
sizeof(*fs_usage) / sizeof(u64) + c->replicas.nr);
(u64 *) fs_usage, fs_usage_u64s(c));
preempt_enable();
return ret;

14
fs/bcachefs/buckets.h
View File

@ -212,14 +212,18 @@ static inline u64 dev_buckets_free(struct bch_fs *c, struct bch_dev *ca)
/* Filesystem usage: */
static inline unsigned fs_usage_u64s(struct bch_fs *c)
{
return sizeof(struct bch_fs_usage) / sizeof(u64) +
READ_ONCE(c->replicas.nr);
}
static inline struct bch_fs_usage *bch2_fs_usage_get_scratch(struct bch_fs *c)
{
struct bch_fs_usage *ret;
ret = this_cpu_ptr(c->usage_scratch);
memset(ret, 0, sizeof(*ret) + c->replicas.nr * sizeof(u64));
struct bch_fs_usage *ret = this_cpu_ptr(c->usage_scratch);
memset(ret, 0, fs_usage_u64s(c) * sizeof(u64));
return ret;
}

51
fs/bcachefs/replicas.c
View File

@ -262,39 +262,37 @@ static void __replicas_table_update(struct bch_fs_usage __percpu *dst_p,
static int replicas_table_update(struct bch_fs *c,
struct bch_replicas_cpu *new_r)
{
struct bch_fs_usage __percpu *new_usage[3] = { NULL, NULL, NULL };
struct bch_fs_usage __percpu *new_usage[2] = { NULL, NULL };
struct bch_fs_usage __percpu *new_scratch = NULL;
unsigned bytes = sizeof(struct bch_fs_usage) +
sizeof(u64) * new_r->nr;
unsigned i;
int ret = -ENOMEM;
for (i = 0; i < 3; i++) {
if (i < 2 && !c->usage[i])
continue;
if (!(new_usage[0] = __alloc_percpu_gfp(bytes, sizeof(u64),
GFP_NOIO)) ||
(c->usage[1] &&
!(new_usage[1] = __alloc_percpu_gfp(bytes, sizeof(u64),
GFP_NOIO))) ||
!(new_scratch = __alloc_percpu_gfp(bytes, sizeof(u64),
GFP_NOIO)))
goto err;
new_usage[i] = __alloc_percpu_gfp(bytes, sizeof(u64),
GFP_NOIO);
if (!new_usage[i])
goto err;
}
if (c->usage[0])
__replicas_table_update(new_usage[0], new_r,
c->usage[0], &c->replicas);
if (c->usage[1])
__replicas_table_update(new_usage[1], new_r,
c->usage[1], &c->replicas);
for (i = 0; i < 2; i++) {
if (!c->usage[i])
continue;
__replicas_table_update(new_usage[i], new_r,
c->usage[i], &c->replicas);
swap(c->usage[i], new_usage[i]);
}
swap(c->usage_scratch, new_usage[2]);
swap(c->replicas, *new_r);
swap(c->usage[0], new_usage[0]);
swap(c->usage[1], new_usage[1]);
swap(c->usage_scratch, new_scratch);
swap(c->replicas, *new_r);
ret = 0;
err:
for (i = 0; i < 3; i++)
free_percpu(new_usage[i]);
free_percpu(new_scratch);
free_percpu(new_usage[1]);
free_percpu(new_usage[0]);
return ret;
}
@ -975,5 +973,6 @@ int bch2_fs_replicas_init(struct bch_fs *c)
{
c->journal.entry_u64s_reserved +=
reserve_journal_replicas(c, &c->replicas);
return 0;
return replicas_table_update(c, &c->replicas);
}

7
fs/bcachefs/super.c
View File

@ -535,7 +535,7 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
{
struct bch_sb_field_members *mi;
struct bch_fs *c;
unsigned i, iter_size, fs_usage_size;
unsigned i, iter_size;
const char *err;
pr_verbose_init(opts, "");
@ -629,9 +629,6 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
(btree_blocks(c) + 1) * 2 *
sizeof(struct btree_node_iter_set);
fs_usage_size = sizeof(struct bch_fs_usage) +
sizeof(u64) * c->replicas.nr;
if (!(c->wq = alloc_workqueue("bcachefs",
WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_HIGHPRI, 1)) ||
!(c->copygc_wq = alloc_workqueue("bcache_copygc",
@ -648,8 +645,6 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
max(offsetof(struct btree_read_bio, bio),
offsetof(struct btree_write_bio, wbio.bio)),
BIOSET_NEED_BVECS) ||
!(c->usage[0] = __alloc_percpu(fs_usage_size, sizeof(u64))) ||
!(c->usage_scratch = __alloc_percpu(fs_usage_size, sizeof(u64))) ||
!(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) ||
mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1,
btree_bytes(c)) ||