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f2fs: split grab_cache_page and wait_on_page_writeback for node pages

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This patch splits grab_cache_page_write_begin into grab_cache_page and
wait_on_page_writeback for node pages.

This patch intends to enhance the latency to get node pages by alleviating
unnecessary wait_on_page_writeback.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim
2014-04-29 17:28:32 +09:00
parent 8aa6f1c5bd
commit 54b591dfda
5 changed files with 16 additions and 5 deletions
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fs/f2fs/node.c
+4 -4
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@@ -853,8 +853,7 @@ struct page *new_node_page(struct dnode_of_data *dn,
if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
return ERR_PTR(-EPERM);
page = grab_cache_page_write_begin(NODE_MAPPING(sbi),
dn->nid, AOP_FLAG_NOFS);
page = grab_cache_page(NODE_MAPPING(sbi), dn->nid);
if (!page)
return ERR_PTR(-ENOMEM);
@@ -871,6 +870,7 @@ struct page *new_node_page(struct dnode_of_data *dn,
new_ni.ino = dn->inode->i_ino;
set_node_addr(sbi, &new_ni, NEW_ADDR, false);
f2fs_wait_on_page_writeback(page, NODE);
fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
set_cold_node(dn->inode, page);
SetPageUptodate(page);
@@ -950,8 +950,7 @@ struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
struct page *page;
int err;
repeat:
page = grab_cache_page_write_begin(NODE_MAPPING(sbi),
nid, AOP_FLAG_NOFS);
page = grab_cache_page(NODE_MAPPING(sbi), nid);
if (!page)
return ERR_PTR(-ENOMEM);
@@ -1562,6 +1561,7 @@ static void recover_inline_xattr(struct inode *inode, struct page *page)
src_addr = inline_xattr_addr(page);
inline_size = inline_xattr_size(inode);
f2fs_wait_on_page_writeback(ipage, NODE);
memcpy(dst_addr, src_addr, inline_size);
update_inode(inode, ipage);