linux-kernel - Re: [PATCH] ocfs2: remove SLAB_MEM

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Message-ID: <34678776-859a-42f2-802b-0c7bc90bdfdc@linux.dev>
Date: Sun, 25 Feb 2024 21:02:53 +0800
From: Chengming Zhou <chengming.zhou@...ux.dev>
To: Joseph Qi <joseph.qi@...ux.alibaba.com>, mark@...heh.com,
 jlbec@...lplan.org, brauner@...nel.org, jlayton@...nel.org,
 keescook@...omium.org
Cc: jack@...e.cz, zhouchengming@...edance.com, azeemshaikh38@...il.com,
 ocfs2-devel@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org, vbabka@...e.cz, roman.gushchin@...ux.dev,
 Xiongwei.Song@...driver.com
Subject: Re: [PATCH] ocfs2: remove SLAB_MEM_SPREAD flag usage

On 2024/2/25 20:20, Joseph Qi wrote:
> 
> 
> On 2/24/24 9:50 PM, 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.
>>
> If I understand correctly, you are referring the following patch:
> https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/
> 
> But it seems that the above patch is not included in mainline yet.
> Or am I missing something?

I realize my commit message should explain more why it's a no-op, my bad.

The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed so it became a dead flag as of v6.8-rc1. That series[1]
mark it obsolete to avoid confusion for users. So here we can just
remove all its users, which has no functional changes.

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

Thanks!

> 
> Joseph
>