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f2fs: reuse inode_entry_slab in gc procedure for using slab more effectively

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There are two slab cache inode_entry_slab and winode_slab using the same
structure as below:

struct dir_inode_entry {
	struct list_head list;	/* list head */
	struct inode *inode;	/* vfs inode pointer */
};

struct inode_entry {
	struct list_head list;
	struct inode *inode;
};

It's a little waste that the two cache can not share their memory space for each
other.
So in this patch we remove one redundant winode_slab slab cache, then use more
universal name struct inode_entry as remaining data structure name of slab,
finally we reuse the inode_entry_slab to store dirty dir item and gc item for
more effective.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2014-12-29 15:56:18 +08:00
committed by Jaegeuk Kim
parent 2ace38e00e
commit 062920734c
6 changed files with 24 additions and 45 deletions
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18
fs/f2fs/checkpoint.c
View File

@@ -24,7 +24,7 @@
#include <trace/events/f2fs.h>
static struct kmem_cache *ino_entry_slab;
static struct kmem_cache *inode_entry_slab;
struct kmem_cache *inode_entry_slab;
/*
* We guarantee no failure on the returned page.
@@ -673,7 +673,7 @@ fail_no_cp:
return -EINVAL;
}
static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
static int __add_dirty_inode(struct inode *inode, struct inode_entry *new)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
@@ -690,7 +690,7 @@ static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
void update_dirty_page(struct inode *inode, struct page *page)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dir_inode_entry *new;
struct inode_entry *new;
int ret = 0;
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
@@ -720,7 +720,7 @@ out:
void add_dirty_dir_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dir_inode_entry *new =
struct inode_entry *new =
f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
int ret = 0;
@@ -738,7 +738,7 @@ void add_dirty_dir_inode(struct inode *inode)
void remove_dirty_dir_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dir_inode_entry *entry;
struct inode_entry *entry;
if (!S_ISDIR(inode->i_mode))
return;
@@ -768,7 +768,7 @@ void remove_dirty_dir_inode(struct inode *inode)
void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
{
struct list_head *head;
struct dir_inode_entry *entry;
struct inode_entry *entry;
struct inode *inode;
retry:
if (unlikely(f2fs_cp_error(sbi)))
@@ -781,7 +781,7 @@ retry:
spin_unlock(&sbi->dir_inode_lock);
return;
}
entry = list_entry(head->next, struct dir_inode_entry, list);
entry = list_entry(head->next, struct inode_entry, list);
inode = igrab(entry->inode);
spin_unlock(&sbi->dir_inode_lock);
if (inode) {
@@ -1107,8 +1107,8 @@ int __init create_checkpoint_caches(void)
sizeof(struct ino_entry));
if (!ino_entry_slab)
return -ENOMEM;
inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
sizeof(struct dir_inode_entry));
inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
sizeof(struct inode_entry));
if (!inode_entry_slab) {
kmem_cache_destroy(ino_entry_slab);
return -ENOMEM;