diff options
| author | Jan Kara <jack@suse.cz> | 2026-03-26 10:54:24 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-03-26 15:03:31 +0100 |
| commit | 521bea7cec8a79684402d555caab408ed43171d5 (patch) | |
| tree | 2e56ba0ca6752141e25f24af7935aa995b0636cf /include/linux | |
| parent | 8fed8176312ba4cdb8169caf96bc552d4c1435d2 (diff) | |
fs: Move metadata bhs tracking to a separate struct
Instead of tracking metadata bhs for a mapping using i_private_list and
i_private_lock create a dedicated mapping_metadata_bhs struct for it.
So far this struct is embedded in address_space but that will be
switched for per-fs private inode parts later in the series. This also
changes the locking from bdev mapping's i_private_lock to a new lock
embedded in mapping_metadata_bhs to untangle the i_private_lock locking
for maintaining lists of metadata bhs and the locking for looking up /
reclaiming bdev's buffer heads. The locking in remove_assoc_map() gets
more complex due to this but overall this looks like a reasonable
tradeoff.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260326095354.16340-72-jack@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index d488459396f4..76360b0040e0 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -445,6 +445,12 @@ struct address_space_operations { extern const struct address_space_operations empty_aops; +/* Structure for tracking metadata buffer heads associated with the mapping */ +struct mapping_metadata_bhs { + spinlock_t lock; /* Lock protecting bh list */ + struct list_head list; /* The list of bhs (b_assoc_buffers) */ +}; + /** * struct address_space - Contents of a cacheable, mappable object. * @host: Owner, either the inode or the block_device. @@ -484,6 +490,7 @@ struct address_space { errseq_t wb_err; spinlock_t i_private_lock; struct list_head i_private_list; + struct mapping_metadata_bhs i_metadata_bhs; struct rw_semaphore i_mmap_rwsem; } __attribute__((aligned(sizeof(long)))) __randomize_layout; /* |