linux-kernel - Re: [PATCH] mm/slub: sysfs cleanup on cpu partial when !SLUB_CPU

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Date:   Tue, 18 Aug 2020 20:26:19 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     <wuyun.wu@...wei.com>
Cc:     Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        "David Rientjes" <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>, <hewenliang4@...wei.com>,
        <hushiyuan@...wei.com>,
        "open list:SLAB ALLOCATOR" <linux-mm@...ck.org>,
        "open list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/slub: sysfs cleanup on cpu partial when
 !SLUB_CPU_PARTIAL

On Thu, 13 Aug 2020 16:48:54 +0800 <wuyun.wu@...wei.com> wrote:

> Hide cpu partial related sysfs entries when !CONFIG_SLUB_CPU_PARTIAL to
> avoid confusion.
> 

But it changes the userspace interface in ways which might cause
existing code to misbehave?

We just had to revert a different commit for this reason :(

http://lkml.kernel.org/r/20200811075412.12872-1-bhe@redhat.com