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f2fs: introduce f2fs_kmem_cache_alloc to hide the unfailed, kmem cache allocation 

Introduce the unfailed version of kmem_cache_alloc named f2fs_kmem_cache_alloc
to hide the retry routine and make the code a bit cleaner.

v2:
   Fix the wrong use of 'retry' tag pointed out by Gao feng.
   Use more neat code to remove redundant tag suggested by Haicheng Li.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Gu Zheng 2013-10-22 14:52:26 +08:00 committed by Jaegeuk Kim
parent 435f2a1b58
commit 7bd59381c8
4 changed files with 35 additions and 41 deletions
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26
fs/f2fs/checkpoint.c
View File

@ -226,12 +226,8 @@ void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
break;
orphan = NULL;
}
retry:
new = kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
if (!new) {
cond_resched();
goto retry;
}
new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
new->ino = ino;
/* add new_oentry into list which is sorted by inode number */
@ -484,12 +480,8 @@ void set_dirty_dir_page(struct inode *inode, struct page *page)
if (!S_ISDIR(inode->i_mode))
return;
retry:
new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
if (!new) {
cond_resched();
goto retry;
}
new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
new->inode = inode;
INIT_LIST_HEAD(&new->list);
@ -506,13 +498,9 @@ retry:
void add_dirty_dir_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct dir_inode_entry *new;
retry:
new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
if (!new) {
cond_resched();
goto retry;
}
struct dir_inode_entry *new =
f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
new->inode = inode;
INIT_LIST_HEAD(&new->list);

15
fs/f2fs/f2fs.h
View File

@ -18,6 +18,7 @@
#include <linux/crc32.h>
#include <linux/magic.h>
#include <linux/kobject.h>
#include <linux/sched.h>
/*
* For mount options
@ -787,6 +788,20 @@ static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
}
static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
gfp_t flags)
{
void *entry;
retry:
entry = kmem_cache_alloc(cachep, flags);
if (!entry) {
cond_resched();
goto retry;
}
return entry;
}
#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
static inline bool IS_INODE(struct page *page)

8
fs/f2fs/gc.c
View File

@ -361,12 +361,8 @@ static void add_gc_inode(struct inode *inode, struct list_head *ilist)
iput(inode);
return;
}
repeat:
new_ie = kmem_cache_alloc(winode_slab, GFP_NOFS);
if (!new_ie) {
cond_resched();
goto repeat;
}
new_ie = f2fs_kmem_cache_alloc(winode_slab, GFP_NOFS);
new_ie->inode = inode;
list_add_tail(&new_ie->list, ilist);
}

27
fs/f2fs/node.c
View File

@ -1296,23 +1296,18 @@ static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build)
if (nid == 0)
return 0;
if (!build)
goto retry;
/* do not add allocated nids */
read_lock(&nm_i->nat_tree_lock);
ne = __lookup_nat_cache(nm_i, nid);
if (ne && nat_get_blkaddr(ne) != NULL_ADDR)
allocated = true;
read_unlock(&nm_i->nat_tree_lock);
if (allocated)
return 0;
retry:
i = kmem_cache_alloc(free_nid_slab, GFP_NOFS);
if (!i) {
cond_resched();
goto retry;
if (build) {
/* do not add allocated nids */
read_lock(&nm_i->nat_tree_lock);
ne = __lookup_nat_cache(nm_i, nid);
if (ne && nat_get_blkaddr(ne) != NULL_ADDR)
allocated = true;
read_unlock(&nm_i->nat_tree_lock);
if (allocated)
return 0;
}
i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
i->nid = nid;
i->state = NID_NEW;