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| author | David Sterba <dsterba@suse.com> | 2020-06-30 03:01:31 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-08 17:53:59 +0300 |
| commit | 55fc29bed8ddb4c3848ecf8cf7133e34c946f223 (patch) | |
| tree | c7174086f876963be22ca15e63e05560378d4518 /fs/btrfs/compression.c | |
| parent | fe5ecbe818de38774895305e1f2d48972f1b745f (diff) | |
| download | linux-55fc29bed8ddb4c3848ecf8cf7133e34c946f223.tar.xz | |
btrfs: use cached value of fs_info::csum_size everywhere
btrfs_get_16 shows up in the system performance profiles (helper to read
16bit values from on-disk structures). This is partially because of the
checksum size that's frequently read along with data reads/writes, other
u16 uses are from item size or directory entries.
Replace all calls to btrfs_super_csum_size by the cached value from
fs_info.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.c')
| -rw-r--r-- | fs/btrfs/compression.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 972fb68a85ac..00bbd859f31b 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -131,7 +131,7 @@ static int btrfs_decompress_bio(struct compressed_bio *cb); static inline int compressed_bio_size(struct btrfs_fs_info *fs_info, unsigned long disk_size) { - u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); + const u16 csum_size = fs_info->csum_size; return sizeof(struct compressed_bio) + (DIV_ROUND_UP(disk_size, fs_info->sectorsize)) * csum_size; @@ -142,7 +142,7 @@ static int check_compressed_csum(struct btrfs_inode *inode, struct bio *bio, { struct btrfs_fs_info *fs_info = inode->root->fs_info; SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); - const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); + const u16 csum_size = fs_info->csum_size; struct page *page; unsigned long i; char *kaddr; @@ -628,7 +628,7 @@ blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, struct extent_map *em; blk_status_t ret = BLK_STS_RESOURCE; int faili = 0; - const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); + const u16 csum_size = fs_info->csum_size; u8 *sums; em_tree = &BTRFS_I(inode)->extent_tree; |