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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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6
fs/f2fs/inline.c
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@@ -156,6 +156,7 @@ int f2fs_write_inline_data(struct inode *inode,
return err;
ipage = dn.inode_page;
f2fs_wait_on_page_writeback(ipage, NODE);
zero_user_segment(ipage, INLINE_DATA_OFFSET,
INLINE_DATA_OFFSET + MAX_INLINE_DATA);
src_addr = kmap(page);
@@ -188,6 +189,8 @@ void truncate_inline_data(struct inode *inode, u64 from)
if (IS_ERR(ipage))
return;
f2fs_wait_on_page_writeback(ipage, NODE);
zero_user_segment(ipage, INLINE_DATA_OFFSET + from,
INLINE_DATA_OFFSET + MAX_INLINE_DATA);
set_page_dirty(ipage);
@@ -218,6 +221,8 @@ process_inline:
ipage = get_node_page(sbi, inode->i_ino);
f2fs_bug_on(IS_ERR(ipage));
f2fs_wait_on_page_writeback(ipage, NODE);
src_addr = inline_data_addr(npage);
dst_addr = inline_data_addr(ipage);
memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
@@ -229,6 +234,7 @@ process_inline:
if (f2fs_has_inline_data(inode)) {
ipage = get_node_page(sbi, inode->i_ino);
f2fs_bug_on(IS_ERR(ipage));
f2fs_wait_on_page_writeback(ipage, NODE);
zero_user_segment(ipage, INLINE_DATA_OFFSET,
INLINE_DATA_OFFSET + MAX_INLINE_DATA);
clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);