On 2019/6/21 0:07, Gao Xiang wrote:
> This patch aims at compacted compression indexes:
> 1) cleanup z_erofs_map_blocks_iter and move into zmap.c;
> 2) add compacted 4/2B decoding support.
>
> On kirin980 platform, sequential read is increased about
> 6% (725MiB/s -> 770MiB/s) on enwik9 dataset if compacted 2B
> feature is enabled.
>
> Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
> +static int vle_legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
> + unsigned long lcn)
> +{
> + struct inode *const inode = m->inode;
> + struct erofs_vnode *const vi = EROFS_V(inode);
> + const erofs_off_t ibase = iloc(EROFS_I_SB(inode), vi->nid);
> + const erofs_off_t pos = Z_EROFS_VLE_EXTENT_ALIGN(ibase +
> + vi->inode_isize +
> + vi->xattr_isize) +
> + 16 + lcn * sizeof(struct z_erofs_vle_decompressed_index);
use macro instead of raw number?
Thanks,
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