dm thin metadata: introduce THIN_MAX_CONCURRENT_LOCKS (8c971178) · Commits · 戴 / test

Introduce THIN_MAX_CONCURRENT_LOCKS into dm-thin-metadata to give a name to an otherwise "magic" number. Signed-off-by:

drivers/md/dm-thin-metadata.c

+8 −6

Original line number	Diff line number	Diff line
		@@ -80,6 +80,12 @@
		#define THIN_METADATA_CACHE_SIZE 64
		#define SECTOR_TO_BLOCK_SHIFT 3

		/*
		* 3 for btree insert +
		* 2 for btree lookup used within space map
		*/
		#define THIN_MAX_CONCURRENT_LOCKS 5

		/* This should be plenty */
		#define SPACE_MAP_ROOT_SIZE 128

		@@ -668,13 +674,9 @@ struct dm_pool_metadata dm_pool_metadata_open(struct block_device bdev,
		return ERR_PTR(-ENOMEM);
		}

		/*
		* Max hex locks:
		* 3 for btree insert +
		* 2 for btree lookup used within space map
		*/
		bm = dm_block_manager_create(bdev, THIN_METADATA_BLOCK_SIZE,
		THIN_METADATA_CACHE_SIZE, 5);
		THIN_METADATA_CACHE_SIZE,
		THIN_MAX_CONCURRENT_LOCKS);
		if (!bm) {
		DMERR("could not create block manager");
		kfree(pmd);