diff options
Diffstat (limited to 'fs/erofs/dir.c')
| -rw-r--r-- | fs/erofs/dir.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/erofs/dir.c b/fs/erofs/dir.c index d1c6cd1a45e8..debf469ad6bd 100644 --- a/fs/erofs/dir.c +++ b/fs/erofs/dir.c @@ -48,8 +48,12 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx) struct inode *dir = file_inode(f); struct erofs_buf buf = __EROFS_BUF_INITIALIZER; struct super_block *sb = dir->i_sb; + struct file_ra_state *ra = &f->f_ra; unsigned long bsz = sb->s_blocksize; unsigned int ofs = erofs_blkoff(sb, ctx->pos); + pgoff_t ra_pages = DIV_ROUND_UP_POW2( + EROFS_I_SB(dir)->dir_ra_bytes, PAGE_SIZE); + pgoff_t nr_pages = DIV_ROUND_UP_POW2(dir->i_size, PAGE_SIZE); int err = 0; bool initial = true; @@ -64,6 +68,16 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx) break; } + /* readahead blocks to enhance performance for large directories */ + if (ra_pages) { + pgoff_t idx = DIV_ROUND_UP_POW2(ctx->pos, PAGE_SIZE); + pgoff_t pages = min(nr_pages - idx, ra_pages); + + if (pages > 1 && !ra_has_index(ra, idx)) + page_cache_sync_readahead(dir->i_mapping, ra, + f, idx, pages); + } + de = erofs_bread(&buf, dbstart, true); if (IS_ERR(de)) { erofs_err(sb, "failed to readdir of logical block %llu of nid %llu", |