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bcache: Add make_btree_freeing_key()

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Refactoring, prep work for incremental garbage collection.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet 2013-07-24 23:18:05 -07:00
parent f269af5a07
commit 8835c1234d
1 changed files with 18 additions and 13 deletions
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31
drivers/md/bcache/btree.c
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@ -1107,6 +1107,22 @@ static struct btree *btree_node_alloc_replacement(struct btree *b)
return n;
}
static void make_btree_freeing_key(struct btree *b, struct bkey *k)
{
unsigned i;
bkey_copy(k, &b->key);
bkey_copy_key(k, &ZERO_KEY);
for (i = 0; i < KEY_PTRS(k); i++) {
uint8_t g = PTR_BUCKET(b->c, k, i)->gen + 1;
SET_PTR_GEN(k, i, g);
}
atomic_inc(&b->c->prio_blocked);
}
/* Garbage collection */
uint8_t __bch_btree_mark_key(struct cache_set *c, int level, struct bkey *k)
@ -2030,20 +2046,9 @@ static int btree_split(struct btree *b, struct btree_op *op,
closure_sync(&cl);
bch_btree_set_root(n1);
} else {
unsigned i;
bkey_copy(parent_keys->top, &b->key);
bkey_copy_key(parent_keys->top, &ZERO_KEY);
for (i = 0; i < KEY_PTRS(&b->key); i++) {
uint8_t g = PTR_BUCKET(b->c, &b->key, i)->gen + 1;
SET_PTR_GEN(parent_keys->top, i, g);
}
bch_keylist_push(parent_keys);
closure_sync(&cl);
atomic_inc(&b->c->prio_blocked);
make_btree_freeing_key(b, parent_keys->top);
bch_keylist_push(parent_keys);
}
rw_unlock(true, n1);