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Date: Thu, 7 Jan 2016 17:36:34 -0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 1/3] f2fs: avoid unnecessary f2fs_balance_fs calls
Only when node page is newly dirtied, it needs to check whether we need to do
f2fs_gc.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/data.c | 4 ++--
fs/f2fs/f2fs.h | 4 ++--
fs/f2fs/inode.c | 19 ++++++++++---------
fs/f2fs/node.c | 26 ++++++++++++++------------
fs/f2fs/node.h | 4 ++--
fs/f2fs/super.c | 2 --
6 files changed, 30 insertions(+), 29 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 77c3bbb..3cf86fd 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -225,8 +225,8 @@ void set_data_blkaddr(struct dnode_of_data *dn)
/* Get physical address of data block */
addr_array = blkaddr_in_node(rn);
addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
- set_page_dirty(node_page);
- dn->node_changed = true;
+ if (set_page_dirty(node_page))
+ dn->node_changed = true;
}
int reserve_new_block(struct dnode_of_data *dn)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 882baba..461b329 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1674,8 +1674,8 @@ long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
void f2fs_set_inode_flags(struct inode *);
struct inode *f2fs_iget(struct super_block *, unsigned long);
int try_to_free_nats(struct f2fs_sb_info *, int);
-void update_inode(struct inode *, struct page *);
-void update_inode_page(struct inode *);
+int update_inode(struct inode *, struct page *);
+int update_inode_page(struct inode *);
int f2fs_write_inode(struct inode *, struct writeback_control *);
void f2fs_evict_inode(struct inode *);
void handle_failed_inode(struct inode *);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index e955008..cabc1ff 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -222,7 +222,7 @@ bad_inode:
return ERR_PTR(ret);
}
-void update_inode(struct inode *inode, struct page *node_page)
+int update_inode(struct inode *inode, struct page *node_page)
{
struct f2fs_inode *ri;
@@ -260,15 +260,16 @@ void update_inode(struct inode *inode, struct page *node_page)
__set_inode_rdev(inode, ri);
set_cold_node(inode, node_page);
- set_page_dirty(node_page);
-
clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
+
+ return set_page_dirty(node_page);
}
-void update_inode_page(struct inode *inode)
+int update_inode_page(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *node_page;
+ int ret = 0;
retry:
node_page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(node_page)) {
@@ -279,10 +280,11 @@ retry:
} else if (err != -ENOENT) {
f2fs_stop_checkpoint(sbi);
}
- return;
+ return 0;
}
- update_inode(inode, node_page);
+ ret = update_inode(inode, node_page);
f2fs_put_page(node_page, 1);
+ return ret;
}
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
@@ -300,9 +302,8 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
* We need to balance fs here to prevent from producing dirty node pages
* during the urgent cleaning time when runing out of free sections.
*/
- update_inode_page(inode);
-
- f2fs_balance_fs(sbi);
+ if (update_inode_page(inode))
+ f2fs_balance_fs(sbi);
return 0;
}
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 5a2d800..c091b75 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -543,7 +543,6 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
set_nid(parent, offset[i - 1], nids[i], i == 1);
alloc_nid_done(sbi, nids[i]);
- dn->node_changed = true;
done = true;
} else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
npage[i] = get_node_page_ra(parent, offset[i - 1]);
@@ -679,8 +678,8 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
ret = truncate_dnode(&rdn);
if (ret < 0)
goto out_err;
- set_nid(page, i, 0, false);
- dn->node_changed = true;
+ if (set_nid(page, i, 0, false))
+ dn->node_changed = true;
}
} else {
child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
@@ -693,8 +692,8 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
rdn.nid = child_nid;
ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
if (ret == (NIDS_PER_BLOCK + 1)) {
- set_nid(page, i, 0, false);
- dn->node_changed = true;
+ if (set_nid(page, i, 0, false))
+ dn->node_changed = true;
child_nofs += ret;
} else if (ret < 0 && ret != -ENOENT) {
goto out_err;
@@ -755,8 +754,8 @@ static int truncate_partial_nodes(struct dnode_of_data *dn,
err = truncate_dnode(dn);
if (err < 0)
goto fail;
- set_nid(pages[idx], i, 0, false);
- dn->node_changed = true;
+ if (set_nid(pages[idx], i, 0, false))
+ dn->node_changed = true;
}
if (offset[idx + 1] == 0) {
@@ -981,7 +980,8 @@ struct page *new_node_page(struct dnode_of_data *dn,
fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
set_cold_node(dn->inode, page);
SetPageUptodate(page);
- set_page_dirty(page);
+ if (set_page_dirty(page))
+ dn->node_changed = true;
if (f2fs_has_xattr_block(ofs))
F2FS_I(dn->inode)->i_xattr_nid = dn->nid;
@@ -1138,18 +1138,20 @@ struct page *get_node_page_ra(struct page *parent, int start)
void sync_inode_page(struct dnode_of_data *dn)
{
+ int ret = 0;
+
if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
- update_inode(dn->inode, dn->node_page);
+ ret = update_inode(dn->inode, dn->node_page);
} else if (dn->inode_page) {
if (!dn->inode_page_locked)
lock_page(dn->inode_page);
- update_inode(dn->inode, dn->inode_page);
+ ret = update_inode(dn->inode, dn->inode_page);
if (!dn->inode_page_locked)
unlock_page(dn->inode_page);
} else {
- update_inode_page(dn->inode);
+ ret = update_inode_page(dn->inode);
}
- dn->node_changed = true;
+ dn->node_changed = ret ? true: false;
}
int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 2de759a..d4d1f63 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -317,7 +317,7 @@ static inline bool IS_DNODE(struct page *node_page)
return true;
}
-static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
+static inline int set_nid(struct page *p, int off, nid_t nid, bool i)
{
struct f2fs_node *rn = F2FS_NODE(p);
@@ -327,7 +327,7 @@ static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
else
rn->in.nid[off] = cpu_to_le32(nid);
- set_page_dirty(p);
+ return set_page_dirty(p);
}
static inline nid_t get_nid(struct page *p, int off, bool i)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0bbd756..f5cc790 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -591,8 +591,6 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
mutex_lock(&sbi->gc_mutex);
err = write_checkpoint(sbi, &cpc);
mutex_unlock(&sbi->gc_mutex);
- } else {
- f2fs_balance_fs(sbi);
}
f2fs_trace_ios(NULL, 1);
--
2.6.3
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