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Date: Wed, 30 Apr 2014 11:33:40 +0900
From: Jaegeuk Kim <jaegeuk.kim@...sung.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Jaegeuk Kim <jaegeuk.kim@...sung.com>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net,
Chao Yu <chao2.yu@...sung.com>
Subject: [PATCH 1/4] f2fs: split grab_cache_page and wait_on_page_writeback for
node pages
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@...sung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
fs/f2fs/dir.c | 2 ++
fs/f2fs/inline.c | 6 ++++++
fs/f2fs/node.c | 8 ++++----
fs/f2fs/node.h | 2 +-
fs/f2fs/xattr.c | 3 +++
5 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 3581c2b..c3f1485 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -268,6 +268,8 @@ static void init_dent_inode(const struct qstr *name, struct page *ipage)
{
struct f2fs_inode *ri;
+ f2fs_wait_on_page_writeback(ipage, NODE);
+
/* copy name info. to this inode page */
ri = F2FS_INODE(ipage);
ri->i_namelen = cpu_to_le32(name->len);
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index d215dbb..8bf34f0 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -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);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 2803ef6..059aaf5 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -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);
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index a076c88..4ee29d5 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -272,7 +272,7 @@ static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
{
struct f2fs_node *rn = F2FS_NODE(p);
- wait_on_page_writeback(p);
+ f2fs_wait_on_page_writeback(p, NODE);
if (i)
rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 6073f9f..1f546b4 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -349,6 +349,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
if (ipage) {
inline_addr = inline_xattr_addr(ipage);
+ f2fs_wait_on_page_writeback(ipage, NODE);
} else {
page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(page)) {
@@ -356,6 +357,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
return PTR_ERR(page);
}
inline_addr = inline_xattr_addr(page);
+ f2fs_wait_on_page_writeback(page, NODE);
}
memcpy(inline_addr, txattr_addr, inline_size);
f2fs_put_page(page, 1);
@@ -376,6 +378,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
return PTR_ERR(xpage);
}
f2fs_bug_on(new_nid);
+ f2fs_wait_on_page_writeback(xpage, NODE);
} else {
struct dnode_of_data dn;
set_new_dnode(&dn, inode, NULL, NULL, new_nid);
--
1.8.4.474.g128a96c
--
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