linux-kernel - Re: [PATCH 0/3] mm: remove zpool

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Message-ID: <f0869789-ee30-4eb9-840a-502d031df1f5@konsulko.se>
Date: Fri, 5 Sep 2025 07:42:34 +0200
From: Vitaly Wool <vitaly.wool@...sulko.se>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: hannes@...xchg.org, linux-kernel@...r.kernel.org,
 Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org
Subject: Re: [PATCH 0/3] mm: remove zpool



On 9/5/25 01:47, Andrew Morton wrote:
> On Thu,  4 Sep 2025 11:33:24 +0200 Vitaly Wool <vitaly.wool@...sulko.se> wrote:
> 
>>> With zswap using zsmalloc directly, there are no more in-tree users of
>>> this code. Remove it.
>>>
>>> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
>>
>> Per the previous discussions, this gets a *NACK* from my side. There is
>> hardly anything _technical_ preventing new in-tree users of zpool API.
>> zpool API is neutral and well-defined, I don’t see *any* good reason for
>> it to be phased out.
> 
> Well, we have the zpool code and we know it works.  If a later need for
> the zpool layer is demonstrated then we can unremove the code at that
> time.

The whole patchset [1] depends on zpool, with the whole intention to use 
it on the Rust side.

[1] https://lkml.org/lkml/2025/8/23/232