Re: [f2fs-dev] [PATCH 2/4 v2] f2fs: avoid unnecessary f2fs_gc for dir operations

Jaegeuk Kim
2015-12-23T18:54:56Z

Chang log from v1:
- add more cases

>From 9fea6346f5dd2992525e853e27a4fe899d122379 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 22 Dec 2015 11:56:08 -0800
Subject: [PATCH] f2fs: avoid unnecessary f2fs_gc for dir operations

The f2fs_balance_fs doesn't need to cover f2fs_new_inode or f2fs_find_entry
works.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/namei.c | 34 ++++++++++++++++++----------------
1 file changed, 18 insertions(+), 16 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 2c32110..e4588f7 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -128,8 +128,6 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
nid_t ino = 0;
int err;

- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -142,6 +140,8 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
inode->i_mapping->a_ops = &f2fs_dblock_aops;
ino = inode->i_ino;

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -288,12 +288,13 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
int err = -ENOENT;

trace_f2fs_unlink_enter(dir, dentry);
- f2fs_balance_fs(sbi);

de = f2fs_find_entry(dir, &dentry->d_name, &page);
if (!de)
goto fail;

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err) {
@@ -341,8 +342,6 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
if (len > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;

- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -353,6 +352,8 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_op = &f2fs_symlink_inode_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -433,8 +434,6 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
struct inode *inode;
int err;

- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, S_IFDIR | mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -444,6 +443,8 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
inode->i_mapping->a_ops = &f2fs_dblock_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);

+ f2fs_balance_fs(sbi);
+
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
@@ -481,8 +482,6 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err = 0;

- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -490,6 +489,8 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &f2fs_special_inode_operations;

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -516,9 +517,6 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err;

- if (!whiteout)
- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -530,6 +528,8 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
inode->i_op = &f2fs_file_inode_operations;
inode->i_fop = &f2fs_file_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+ f2fs_balance_fs(sbi);
}

f2fs_lock_op(sbi);
@@ -604,8 +604,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out;
}

- f2fs_balance_fs(sbi);
-
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry)
goto out;
@@ -635,6 +633,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (!new_entry)
goto out_whiteout;

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);

err = acquire_orphan_inode(sbi);
@@ -666,6 +666,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
update_inode_page(old_inode);
update_inode_page(new_inode);
} else {
+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);

err = f2fs_add_link(new_dentry, old_inode);
@@ -763,8 +765,6 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
new_inode)))
return -EPERM;

- f2fs_balance_fs(sbi);
-
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry)
goto out;
@@ -807,6 +807,8 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out_new_dir;
}

+ f2fs_balance_fs(sbi);
+
f2fs_lock_op(sbi);

err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name);
--
2.5.4 (Apple Git-61)