linux-kernel - Re: [PATCH 2/4] mm: Kconfig: group swap, slab, hotplug and thp options into submenus

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Date:   Tue, 24 Aug 2021 14:03:43 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 2/4] mm: Kconfig: group swap, slab, hotplug and thp
 options into submenus

On 8/19/21 21:55, Johannes Weiner wrote:
> There are several clusters of related config options spread throughout
> the mostly flat MM submenu. Group them together and put specialization
> options into further subdirectories to make the MM section a bit more
> organized and easier to navigate.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

Acked-by: Vlastimil Babka <vbabka@...e.cz>

Note:

> -config ZBUD
> -	tristate "Low (Up to 2x) density storage for compressed pages"
> -	help
> -	  A special purpose allocator for storing compressed pages.
> -	  It is designed to store up to two compressed pages per physical
> -	  page.  While this design limits storage density, it has simple and
> -	  deterministic reclaim properties that make it preferable to a higher
> -	  density approach when reclaim will be used.
> -

The whole large hunk with deletion part of the block move will be rejected in
current trees because this is apparently based on older commit than 2a03085ce887
("mm/zbud: don't export any zbud API") which adds a "depends on ZPOOL" to the
above. It's thus also missing in the add hunk part of the move and if not
careful when resolving the reject, the depend will then be missing in the result.