From 062920734c0de9dd4f0a9bdc36fdcabc2751eb34 Mon Sep 17 00:00:00 2001
From: Chao Yu <chao2.yu@samsung.com>
Date: Mon, 29 Dec 2014 15:56:18 +0800
Subject: f2fs: reuse inode_entry_slab in gc procedure for using slab more
effectively
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>
---
fs/f2fs/gc.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)
(limited to 'fs/f2fs/gc.c')
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index eec0933a4819..40887d3c9d01 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -24,8 +24,6 @@
#include "gc.h"
#include <trace/events/f2fs.h>
-static struct kmem_cache *winode_slab;
-
static int gc_thread_func(void *data)
{
struct f2fs_sb_info *sbi = data;
@@ -356,7 +354,7 @@ static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode)
iput(inode);
return;
}
- new_ie = f2fs_kmem_cache_alloc(winode_slab, GFP_NOFS);
+ new_ie = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
new_ie->inode = inode;
retry:
if (radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie)) {
@@ -373,7 +371,7 @@ static void put_gc_inode(struct gc_inode_list *gc_list)
radix_tree_delete(&gc_list->iroot, ie->inode->i_ino);
iput(ie->inode);
list_del(&ie->list);
- kmem_cache_free(winode_slab, ie);
+ kmem_cache_free(inode_entry_slab, ie);
}
}
@@ -750,17 +748,3 @@ void build_gc_manager(struct f2fs_sb_info *sbi)
{
DIRTY_I(sbi)->v_ops = &default_v_ops;
}
-
-int __init create_gc_caches(void)
-{
- winode_slab = f2fs_kmem_cache_create("f2fs_gc_inodes",
- sizeof(struct inode_entry));
- if (!winode_slab)
- return -ENOMEM;
- return 0;
-}
-
-void destroy_gc_caches(void)
-{
- kmem_cache_destroy(winode_slab);
-}
--
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