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| author |   Tetsuhiro Kohada <kohada.tetsuhiro@dc.mitsubishielectric.co.jp> | 2020-05-20 16:56:41 +0900 |
|---|---|---|
| committer |   Namjae Jeon <namjae.jeon@samsung.com> | 2020-06-09 16:49:05 +0900 |
| commit | 943af1fdacfebe4ff13430655abc460a5e1072f7 (patch) | |
| tree | f11c323bba0aae808b76cc1a9cbedf107faeddd0 /fs/exfat/namei.c | |
| parent | exfat: replace 'time_ms' with 'time_cs' (diff) | |
| download | linux-dev-943af1fdacfebe4ff13430655abc460a5e1072f7.tar.xz linux-dev-943af1fdacfebe4ff13430655abc460a5e1072f7.zip | |
exfat: optimize dir-cache
Optimize directory access based on exfat_entry_set_cache.
- Hold bh instead of copied d-entry.
- Modify bh->data directly instead of the copied d-entry.
- Write back the retained bh instead of rescanning the d-entry-set.
And
- Remove unused cache related definitions.
Signed-off-by: Tetsuhiro Kohada <kohada.tetsuhiro@dc.mitsubishielectric.co.jp>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Diffstat (limited to 'fs/exfat/namei.c')
| -rw-r--r-- | fs/exfat/namei.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c index 48f4df883f3b..5b0f35329d63 100644 --- a/fs/exfat/namei.c +++ b/fs/exfat/namei.c @@ -600,8 +600,6 @@ static int exfat_find(struct inode *dir, struct qstr *qname, int ret, dentry, num_entries, count; struct exfat_chain cdir; struct exfat_uni_name uni_name; - struct exfat_dentry *ep, *ep2; - struct exfat_entry_set_cache *es = NULL; struct super_block *sb = dir->i_sb; struct exfat_sb_info *sbi = EXFAT_SB(sb); struct exfat_inode_info *ei = EXFAT_I(dir); @@ -660,10 +658,14 @@ static int exfat_find(struct inode *dir, struct qstr *qname, info->num_subdirs = count; } else { - es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES, &ep); + struct exfat_dentry *ep, *ep2; + struct exfat_entry_set_cache *es; + + es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES); if (!es) return -EIO; - ep2 = ep + 1; + ep = exfat_get_dentry_cached(es, 0); + ep2 = exfat_get_dentry_cached(es, 1); info->type = exfat_get_entry_type(ep); info->attr = le16_to_cpu(ep->dentry.file.attr); @@ -681,7 +683,7 @@ static int exfat_find(struct inode *dir, struct qstr *qname, exfat_fs_error(sb, "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)", i_size_read(dir), ei->dir.dir, ei->entry); - kfree(es); + exfat_free_dentry_set(es, false); return -EIO; } @@ -700,7 +702,7 @@ static int exfat_find(struct inode *dir, struct qstr *qname, ep->dentry.file.access_time, ep->dentry.file.access_date, 0); - kfree(es); + exfat_free_dentry_set(es, false); if (info->type == TYPE_DIR) { exfat_chain_set(&cdir, info->start_clu, |