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author | Kent Overstreet <kent.overstreet@linux.dev> | 2022-12-05 18:24:19 +0300 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:09:53 +0300 |
commit | 80c33085783656617d0d07e1bc9fba70a592ce5c (patch) | |
tree | 2f2a6b43a3b6caab092c4f74df9f5a582e1a60b0 /fs/bcachefs/buckets_types.h | |
parent | 1b30ed5fd87828b5e29647510eefb18a363e4d19 (diff) | |
download | linux-80c33085783656617d0d07e1bc9fba70a592ce5c.tar.xz |
bcachefs: Fragmentation LRU
Now that we have much more efficient updates to the LRU btree, this
patch adds a new LRU that indexes buckets by fragmentation.
This means copygc no longer has to scan every bucket to find buckets
that need to be evacuated.
Changes:
- A new field in bch_alloc_v4, fragmentation_lru - this corresponds to
the bucket's position in the fragmentation LRU. We add a new field
for this instead of calculating it as needed because we may make the
fragmentation LRU optional; this field indicates whether a bucket is
on the fragmentation LRU.
Also, zoned devices will introduce variable bucket sizes; explicitly
recording the LRU position will be safer for them.
- A new copygc path for using the fragmentation LRU instead of
scanning every bucket and building up an in-memory heap.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/buckets_types.h')
-rw-r--r-- | fs/bcachefs/buckets_types.h | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/fs/bcachefs/buckets_types.h b/fs/bcachefs/buckets_types.h index 1dbba7d906dd..2a9dab9006ef 100644 --- a/fs/bcachefs/buckets_types.h +++ b/fs/bcachefs/buckets_types.h @@ -89,15 +89,4 @@ struct disk_reservation { unsigned nr_replicas; }; -struct copygc_heap_entry { - u8 dev; - u8 gen; - u8 replicas; - u32 fragmentation; - u32 sectors; - u64 bucket; -}; - -typedef HEAP(struct copygc_heap_entry) copygc_heap; - #endif /* _BUCKETS_TYPES_H */ |