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Use slab allocator for simplefs_inode

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Struct simplefs_inode allocation is quite frequently (for fs), so it
will be better to use slab allocator instead of page allocator.
This commit is contained in:
Azat Khuzhin 2013-09-30 22:42:53 +04:00
parent 031f974c36
commit 3050cdf2ed
1 changed files with 15 additions and 6 deletions
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21
simple.c
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@ -31,6 +31,8 @@ static DEFINE_MUTEX(simplefs_inodes_mgmt_lock);
* done in parallel */
static DEFINE_MUTEX(simplefs_directory_children_update_lock);
static struct kmem_cache *sfs_inode_cachep;
void simplefs_sb_sync(struct super_block *vsb)
{
struct buffer_head *bh;
@ -243,10 +245,7 @@ struct simplefs_inode *simplefs_get_inode(struct super_block *sb,
#endif
for (i = 0; i < sfs_sb->inodes_count; i++) {
if (sfs_inode->inode_no == inode_no) {
/**
* TODO: use slab allocator instead.
*/
inode_buffer = kmalloc(sizeof(*inode_buffer), GFP_KERNEL);
inode_buffer = kmem_cache_alloc(sfs_inode_cachep, GFP_KERNEL);
memcpy(inode_buffer, sfs_inode, sizeof(*inode_buffer));
break;
@ -490,7 +489,7 @@ static int simplefs_create_fs_object(struct inode *dir, struct dentry *dentry,
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_ino = (count + SIMPLEFS_START_INO - SIMPLEFS_RESERVED_INODES + 1);
sfs_inode = kmalloc(sizeof(struct simplefs_inode), GFP_KERNEL);
sfs_inode = kmem_cache_alloc(sfs_inode_cachep, GFP_KERNEL);
sfs_inode->inode_no = inode->i_ino;
inode->i_private = sfs_inode;
sfs_inode->mode = mode;
@ -643,7 +642,7 @@ void simplefs_destory_inode(struct inode *inode)
printk(KERN_INFO "Freeing private data of inode %p (%lu)\n",
sfs_inode, inode->i_ino);
kfree(sfs_inode);
kmem_cache_free(sfs_inode_cachep, sfs_inode);
}
static const struct super_operations simplefs_sops = {
@ -764,6 +763,15 @@ static int simplefs_init(void)
{
int ret;
sfs_inode_cachep = kmem_cache_create("sfs_inode_cache",
sizeof(struct simplefs_inode),
0,
(SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD),
NULL);
if (!sfs_inode_cachep) {
return -ENOMEM;
}
ret = register_filesystem(&simplefs_fs_type);
if (likely(ret == 0))
printk(KERN_INFO "Sucessfully registered simplefs\n");
@ -778,6 +786,7 @@ static void simplefs_exit(void)
int ret;
ret = unregister_filesystem(&simplefs_fs_type);
kmem_cache_destroy(sfs_inode_cachep);
if (likely(ret == 0))
printk(KERN_INFO "Sucessfully unregistered simplefs\n");