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f2fs: avoid multiple node page writes due to inline_data

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The sceanrio is:
1. create fully node blocks
2. flush node blocks
3. write inline_data for all the node blocks again
4. flush node blocks redundantly

So, this patch tries to flush inline_data when flushing node blocks.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-01-25 05:57:05 -08:00
parent 3c082b7b5b
commit 2049d4fcb0
5 changed files with 63 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
fs/f2fs/data.c
View file

@ -1463,6 +1463,7 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi,
if (pos + len <= MAX_INLINE_DATA) {
read_inline_data(page, ipage);
set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
set_inline_node(ipage);
sync_inode_page(&dn);
} else {
err = f2fs_convert_inline_page(&dn, page);

2
fs/f2fs/inline.c
View file

@ -159,6 +159,7 @@ int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
/* clear inline data and flag after data writeback */
truncate_inline_inode(dn->inode_page, 0);
clear_inline_node(dn->inode_page);
clear_out:
stat_dec_inline_inode(dn->inode);
f2fs_clear_inline_inode(dn->inode);
@ -233,6 +234,7 @@ int f2fs_write_inline_data(struct inode *inode, struct page *page)
set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
sync_inode_page(&dn);
clear_inline_node(dn.inode_page);
f2fs_put_dnode(&dn);
return 0;
}

4
fs/f2fs/inode.c
View file

@ -263,6 +263,10 @@ int update_inode(struct inode *inode, struct page *node_page)
set_cold_node(inode, node_page);
clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
/* deleted inode */
if (inode->i_nlink == 0)
clear_inline_node(node_page);
return set_page_dirty(node_page);
}

41
fs/f2fs/node.c
View file

@ -1154,6 +1154,39 @@ void sync_inode_page(struct dnode_of_data *dn)
dn->node_changed = ret ? true: false;
}
static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino)
{
struct inode *inode;
struct page *page;
/* should flush inline_data before evict_inode */
inode = ilookup(sbi->sb, ino);
if (!inode)
return;
page = pagecache_get_page(inode->i_mapping, 0, FGP_LOCK|FGP_NOWAIT, 0);
if (!page)
goto iput_out;
if (!PageUptodate(page))
goto page_out;
if (!PageDirty(page))
goto page_out;
if (!clear_page_dirty_for_io(page))
goto page_out;
if (!f2fs_write_inline_data(inode, page))
inode_dec_dirty_pages(inode);
else
set_page_dirty(page);
page_out:
f2fs_put_page(page, 1);
iput_out:
iput(inode);
}
int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
struct writeback_control *wbc)
{
@ -1221,6 +1254,14 @@ int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
goto continue_unlock;
}
/* flush inline_data */
if (!ino && is_inline_node(page)) {
clear_inline_node(page);
unlock_page(page);
flush_inline_data(sbi, ino_of_node(page));
continue;
}
if (!clear_page_dirty_for_io(page))
goto continue_unlock;

15
fs/f2fs/node.h
View file

@ -379,6 +379,21 @@ static inline int is_node(struct page *page, int type)
#define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
#define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
static inline int is_inline_node(struct page *page)
{
return PageChecked(page);
}
static inline void set_inline_node(struct page *page)
{
SetPageChecked(page);
}
static inline void clear_inline_node(struct page *page)
{
ClearPageChecked(page);
}
static inline void set_cold_node(struct inode *inode, struct page *page)
{
struct f2fs_node *rn = F2FS_NODE(page);