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.f...@cn.fujitsu.com>
---
fs/f2fs/checkpoint.c | 26 +++++++-------------------
fs/f2fs/f2fs.h | 15 +++++++++++++++
fs/f2fs/gc.c | 8 ++------
fs/f2fs/node.c | 27 +++++++++++----------------
4 files changed, 35 insertions(+), 41 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 8d16071..6fb484c 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -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);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 171c52f..2949275 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -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)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index fbad968..7914b92 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -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);
}
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index ef80f79..4fa3fd5 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -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;
--
1.7.7
------------------------------------------------------------------------------
October Webinars: Code for Performance
Free Intel webinars can help you accelerate application performance.
Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from
the latest Intel processors and coprocessors. See abstracts and register >
http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
