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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 21:29:59 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-21 21:27:10 +0300 |
| commit | ec4edd7b9d2038a97e0ba3fad8fc8492b0d12d35 (patch) | |
| tree | 2ba47c4de8460460489d335e3f562eab8819ce96 /fs/bcachefs/btree_cache.c | |
| parent | 2acc59dd88d27ad69b66ded80df16c042b04eeec (diff) | |
| download | linux-ec4edd7b9d2038a97e0ba3fad8fc8492b0d12d35.tar.xz | |
bcachefs: Prep work for variable size btree node buffers
bcachefs btree nodes are big - typically 256k - and btree roots are
pinned in memory. As we're now up to 18 btrees, we now have significant
memory overhead in mostly empty btree roots.
And in the future we're going to start enforcing that certain btree node
boundaries exist, to solve lock contention issues - analagous to XFS's
AGIs.
Thus, we need to start allocating smaller btree node buffers when we
can. This patch changes code that refers to the filesystem constant
c->opts.btree_node_size to refer to the btree node buffer size -
btree_buf_bytes() - where appropriate.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_cache.c')
| -rw-r--r-- | fs/bcachefs/btree_cache.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/bcachefs/btree_cache.c b/fs/bcachefs/btree_cache.c index 8e2488a4b58d..d7c81beac14a 100644 --- a/fs/bcachefs/btree_cache.c +++ b/fs/bcachefs/btree_cache.c @@ -60,7 +60,7 @@ static void btree_node_data_free(struct bch_fs *c, struct btree *b) clear_btree_node_just_written(b); - kvpfree(b->data, btree_bytes(c)); + kvpfree(b->data, btree_buf_bytes(b)); b->data = NULL; #ifdef __KERNEL__ kvfree(b->aux_data); @@ -94,7 +94,7 @@ static int btree_node_data_alloc(struct bch_fs *c, struct btree *b, gfp_t gfp) { BUG_ON(b->data || b->aux_data); - b->data = kvpmalloc(btree_bytes(c), gfp); + b->data = kvpmalloc(btree_buf_bytes(b), gfp); if (!b->data) return -BCH_ERR_ENOMEM_btree_node_mem_alloc; #ifdef __KERNEL__ @@ -107,7 +107,7 @@ static int btree_node_data_alloc(struct bch_fs *c, struct btree *b, gfp_t gfp) b->aux_data = NULL; #endif if (!b->aux_data) { - kvpfree(b->data, btree_bytes(c)); + kvpfree(b->data, btree_buf_bytes(b)); b->data = NULL; return -BCH_ERR_ENOMEM_btree_node_mem_alloc; } @@ -126,7 +126,7 @@ static struct btree *__btree_node_mem_alloc(struct bch_fs *c, gfp_t gfp) bkey_btree_ptr_init(&b->key); INIT_LIST_HEAD(&b->list); INIT_LIST_HEAD(&b->write_blocked); - b->byte_order = ilog2(btree_bytes(c)); + b->byte_order = ilog2(c->opts.btree_node_size); return b; } @@ -408,7 +408,7 @@ void bch2_fs_btree_cache_exit(struct bch_fs *c) if (c->verify_data) list_move(&c->verify_data->list, &bc->live); - kvpfree(c->verify_ondisk, btree_bytes(c)); + kvpfree(c->verify_ondisk, c->opts.btree_node_size); for (i = 0; i < btree_id_nr_alive(c); i++) { struct btree_root *r = bch2_btree_id_root(c, i); @@ -1192,7 +1192,7 @@ void bch2_btree_node_to_text(struct printbuf *out, struct bch_fs *c, const struc " failed unpacked %zu\n", b->unpack_fn_len, b->nr.live_u64s * sizeof(u64), - btree_bytes(c) - sizeof(struct btree_node), + btree_buf_bytes(b) - sizeof(struct btree_node), b->nr.live_u64s * 100 / btree_max_u64s(c), b->sib_u64s[0], b->sib_u64s[1], |