linux-kernel - Re: [PATCH] jffs2: Simplify the allocation of slab caches

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Message-ID: <fe71e834-3b13-9b9c-db87-ba106e8c78e0@huawei.com>
Date: Mon, 5 Feb 2024 19:40:41 +0800
From: Zhihao Cheng <chengzhihao1@...wei.com>
To: Kunwu Chan <chentao@...inos.cn>, <dwmw2@...radead.org>, <richard@....at>
CC: <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] jffs2: Simplify the allocation of slab caches

在 2024/2/5 15:51, Kunwu Chan 写道:
> Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
> to simplify the creation of SLAB caches.
> And change cache name from 'jffs2_tmp_dnode' to 'jffs2_tmp_dnode_info'.
> 
> Signed-off-by: Kunwu Chan <chentao@...inos.cn>
> ---
>   fs/jffs2/malloc.c | 32 ++++++++------------------------
>   1 file changed, 8 insertions(+), 24 deletions(-)

Reviewed-by: Zhihao Cheng <chengzhihao1@...wei.com>

> 
> diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
> index ce1189793288..411de8b361b2 100644
> --- a/fs/jffs2/malloc.c
> +++ b/fs/jffs2/malloc.c
> @@ -33,27 +33,19 @@ static struct kmem_cache *xattr_ref_cache;
>   
>   int __init jffs2_create_slab_caches(void)
>   {
> -	full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
> -					    sizeof(struct jffs2_full_dnode),
> -					    0, 0, NULL);
> +	full_dnode_slab = KMEM_CACHE(jffs2_full_dnode, 0);
>   	if (!full_dnode_slab)
>   		goto err;
>   
> -	raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
> -					    sizeof(struct jffs2_raw_dirent),
> -					    0, SLAB_HWCACHE_ALIGN, NULL);
> +	raw_dirent_slab = KMEM_CACHE(jffs2_raw_dirent, SLAB_HWCACHE_ALIGN);
>   	if (!raw_dirent_slab)
>   		goto err;
>   
> -	raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
> -					   sizeof(struct jffs2_raw_inode),
> -					   0, SLAB_HWCACHE_ALIGN, NULL);
> +	raw_inode_slab = KMEM_CACHE(jffs2_raw_inode, SLAB_HWCACHE_ALIGN);
>   	if (!raw_inode_slab)
>   		goto err;
>   
> -	tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
> -						sizeof(struct jffs2_tmp_dnode_info),
> -						0, 0, NULL);
> +	tmp_dnode_info_slab = KMEM_CACHE(jffs2_tmp_dnode_info, 0);
>   	if (!tmp_dnode_info_slab)
>   		goto err;
>   
> @@ -63,28 +55,20 @@ int __init jffs2_create_slab_caches(void)
>   	if (!raw_node_ref_slab)
>   		goto err;
>   
> -	node_frag_slab = kmem_cache_create("jffs2_node_frag",
> -					   sizeof(struct jffs2_node_frag),
> -					   0, 0, NULL);
> +	node_frag_slab = KMEM_CACHE(jffs2_node_frag, 0);
>   	if (!node_frag_slab)
>   		goto err;
>   
> -	inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
> -					     sizeof(struct jffs2_inode_cache),
> -					     0, 0, NULL);
> +	inode_cache_slab = KMEM_CACHE(jffs2_inode_cache, 0);
>   	if (!inode_cache_slab)
>   		goto err;
>   
>   #ifdef CONFIG_JFFS2_FS_XATTR
> -	xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
> -					     sizeof(struct jffs2_xattr_datum),
> -					     0, 0, NULL);
> +	xattr_datum_cache = KMEM_CACHE(jffs2_xattr_datum, 0);
>   	if (!xattr_datum_cache)
>   		goto err;
>   
> -	xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
> -					   sizeof(struct jffs2_xattr_ref),
> -					   0, 0, NULL);
> +	xattr_ref_cache = KMEM_CACHE(jffs2_xattr_ref, 0);
>   	if (!xattr_ref_cache)
>   		goto err;
>   #endif
>