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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-04-17 17:50:47 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@gmail.com> | 2022-05-30 18:17:22 -0400 |
| commit | f165d7daca19db1677d840ed71a59f7d3993f1a1 (patch) | |
| tree | 27d5ee7b74393801890da835eb4870447d8f16e8 | |
| parent | 44d62257d734dd55a1e993c32c45fb66cb152221 (diff) | |
bcachefs: Allocate some extra room in btree_key_cache_fill()
If we allocate a buffer that's a bit bigger than necessary the
transaction commit path will be much less likely to have to reallocate -
which requires a transaction restart.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
| -rw-r--r-- | fs/bcachefs/btree_key_cache.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_key_cache.c b/fs/bcachefs/btree_key_cache.c index ab394c2d6ef2..a575189f358c 100644 --- a/fs/bcachefs/btree_key_cache.c +++ b/fs/bcachefs/btree_key_cache.c @@ -236,6 +236,13 @@ static int btree_key_cache_fill(struct btree_trans *trans, */ new_u64s = k.k->u64s + 1; + /* + * Allocate some extra space so that the transaction commit path is less + * likely to have to reallocate, since that requires a transaction + * restart: + */ + new_u64s = min(256U, (new_u64s * 3) / 2); + if (new_u64s > ck->u64s) { new_u64s = roundup_pow_of_two(new_u64s); new_k = kmalloc(new_u64s * sizeof(u64), GFP_NOFS); |