linux-kernel - Re: [PATCH] 9p: remove SLAB_MEM

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Date: Mon, 26 Feb 2024 10:51:00 +0800
From: Chengming Zhou <chengming.zhou@...ux.dev>
To: ericvh@...nel.org, lucho@...kov.net, asmadeus@...ewreck.org,
 linux_oss@...debyte.com
Cc: v9fs@...ts.linux.dev, linux-kernel@...r.kernel.org, vbabka@...e.cz,
 roman.gushchin@...ux.dev, Xiongwei.Song@...driver.com
Subject: Re: [PATCH] 9p: remove SLAB_MEM_SPREAD flag usage

On 2024/2/24 21:46, chengming.zhou@...ux.dev wrote:
> From: Chengming Zhou <zhouchengming@...edance.com>
> 
> The SLAB_MEM_SPREAD flag is already a no-op as of 6.8-rc1, remove
> its usage so we can delete it from slab. No functional change.

Update changelog to make it clearer:

The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed as of v6.8-rc1, so it became a dead flag since the commit
16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
series[1] went on to mark it obsolete to avoid confusion for users.
Here we can just remove all its users, which has no functional change.

[1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/

Thanks!

> 
> Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>
> ---
>  fs/9p/v9fs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
> index 61dbe52bb3a3..281a1ed03a04 100644
> --- a/fs/9p/v9fs.c
> +++ b/fs/9p/v9fs.c
> @@ -637,7 +637,7 @@ static int v9fs_init_inode_cache(void)
>  	v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
>  					  sizeof(struct v9fs_inode),
>  					  0, (SLAB_RECLAIM_ACCOUNT|
> -					      SLAB_MEM_SPREAD|SLAB_ACCOUNT),
> +					      SLAB_ACCOUNT),
>  					  v9fs_inode_init_once);
>  	if (!v9fs_inode_cache)
>  		return -ENOMEM;