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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-03-04 19:16:04 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:26 -0400 |
| commit | 3098553776a16c08446c408005090423d62e6b54 (patch) | |
| tree | 17cc317918e2fb51dd540d86650510928965cb5e /fs/bcachefs/btree_cache.h | |
| parent | 5b3f780540aa5e39859a0c00ace61713da054a0f (diff) | |
| download | lwn-3098553776a16c08446c408005090423d62e6b54.tar.gz lwn-3098553776a16c08446c408005090423d62e6b54.zip | |
bcachefs: Fix usage of six lock's percpu mode
Six locks have a percpu mode, which we use for interior btree nodes, as
well as btree key cache keys for the subvolumes btree. We've been
switching locks back and forth between percpu and non percpu mode as
needed, but it turns out this is racy - when we're reusing an existing
node, other threads could be attempting to lock it while we're switching
it between modes.
This patch fixes this by never switching 'struct btree' between the two
modes, and instead segragating them between two different freed lists.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_cache.h')
| -rw-r--r-- | fs/bcachefs/btree_cache.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/bcachefs/btree_cache.h b/fs/bcachefs/btree_cache.h index 96f8f90e85a1..83723805f12a 100644 --- a/fs/bcachefs/btree_cache.h +++ b/fs/bcachefs/btree_cache.h @@ -20,7 +20,7 @@ void bch2_btree_cache_cannibalize_unlock(struct bch_fs *); int bch2_btree_cache_cannibalize_lock(struct bch_fs *, struct closure *); struct btree *__bch2_btree_node_mem_alloc(struct bch_fs *); -struct btree *bch2_btree_node_mem_alloc(struct bch_fs *); +struct btree *bch2_btree_node_mem_alloc(struct bch_fs *, bool); struct btree *bch2_btree_node_get(struct btree_trans *, struct btree_path *, const struct bkey_i *, unsigned, |