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staging: erofs: integrate decompression inplace

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Decompressor needs to know whether it's a partial
or full decompression since only full decompression
can be decompressed in-place.

On kirin980 platform, sequential read is finally
increased to 812MiB/s after decompression inplace
is enabled.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2019-06-24 15:22:58 +08:00 committed by Greg Kroah-Hartman
parent 88aaf5a79c
commit b6a76183de
4 changed files with 16 additions and 4 deletions
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3
drivers/staging/erofs/internal.h
View File

@ -441,6 +441,7 @@ extern const struct address_space_operations z_erofs_vle_normalaccess_aops;
*/
enum {
BH_Zipped = BH_PrivateStart,
BH_FullMapped,
};
/* Has a disk mapping */
@ -449,6 +450,8 @@ enum {
#define EROFS_MAP_META (1 << BH_Meta)
/* The extent has been compressed */
#define EROFS_MAP_ZIPPED (1 << BH_Zipped)
/* The length of extent is full */
#define EROFS_MAP_FULL_MAPPED (1 << BH_FullMapped)
struct erofs_map_blocks {
erofs_off_t m_pa, m_la;

15
drivers/staging/erofs/unzip_vle.c
View File

@ -469,6 +469,9 @@ z_erofs_vle_work_register(const struct z_erofs_vle_work_finder *f,
Z_EROFS_VLE_WORKGRP_FMT_LZ4 :
Z_EROFS_VLE_WORKGRP_FMT_PLAIN);
if (map->m_flags & EROFS_MAP_FULL_MAPPED)
grp->flags |= Z_EROFS_VLE_WORKGRP_FULL_LENGTH;
/* new workgrps have been claimed as type 1 */
WRITE_ONCE(grp->next, *f->owned_head);
/* primary and followed work for all new workgrps */
@ -901,7 +904,7 @@ static int z_erofs_vle_unzip(struct super_block *sb,
unsigned int i, outputsize;
enum z_erofs_page_type page_type;
bool overlapped;
bool overlapped, partial;
struct z_erofs_vle_work *work;
int err;
@ -1009,10 +1012,13 @@ repeat:
if (unlikely(err))
goto out;
if (nr_pages << PAGE_SHIFT >= work->pageofs + grp->llen)
if (nr_pages << PAGE_SHIFT >= work->pageofs + grp->llen) {
outputsize = grp->llen;
else
partial = !(grp->flags & Z_EROFS_VLE_WORKGRP_FULL_LENGTH);
} else {
outputsize = (nr_pages << PAGE_SHIFT) - work->pageofs;
partial = true;
}
if (z_erofs_vle_workgrp_fmt(grp) == Z_EROFS_VLE_WORKGRP_FMT_PLAIN)
algorithm = Z_EROFS_COMPRESSION_SHIFTED;
@ -1028,7 +1034,8 @@ repeat:
.outputsize = outputsize,
.alg = algorithm,
.inplace_io = overlapped,
.partial_decoding = true }, page_pool);
.partial_decoding = partial
}, page_pool);
out:
/* must handle all compressed pages before endding pages */

1
drivers/staging/erofs/unzip_vle.h
View File

@ -46,6 +46,7 @@ struct z_erofs_vle_work {
#define Z_EROFS_VLE_WORKGRP_FMT_PLAIN 0
#define Z_EROFS_VLE_WORKGRP_FMT_LZ4 1
#define Z_EROFS_VLE_WORKGRP_FMT_MASK 1
#define Z_EROFS_VLE_WORKGRP_FULL_LENGTH 2
typedef void *z_erofs_vle_owned_workgrp_t;

1
drivers/staging/erofs/zmap.c
View File

@ -424,6 +424,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
goto unmap_out;
}
end = (m.lcn << lclusterbits) | m.clusterofs;
map->m_flags |= EROFS_MAP_FULL_MAPPED;
m.delta[0] = 1;
/* fallthrough */
case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD: