linux-kernel - Re: [PATCH v2 4/4] mm/mempolicy: Fix duplicate node addition in sysfs for weighted interleave

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Message-ID: <Z9MK235uVDmK1oYB@gourry-fedora-PF4VCD3F>
Date: Thu, 13 Mar 2025 12:42:03 -0400
From: Gregory Price <gourry@...rry.net>
To: Rakie Kim <rakie.kim@...com>
Cc: akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org,
	joshua.hahnjy@...il.com, dan.j.williams@...el.com,
	ying.huang@...ux.alibaba.com, kernel_team@...ynix.com,
	honggyu.kim@...com, yunjeong.mun@...com
Subject: Re: [PATCH v2 4/4] mm/mempolicy: Fix duplicate node addition in
 sysfs for weighted interleave

On Wed, Mar 12, 2025 at 04:56:27PM +0900, Rakie Kim wrote:
> Sysfs attributes for interleave control were registered both at initialization
> and when new nodes were detected via hotplug, leading to potential duplicates.
> 
> This patch ensures that each node is registered only once, preventing conflicts
> and redundant sysfs entries.
>

After looking more closely at patch 2, this seems to suggest we're not
understanding the OFFLINE/ONLINE events well enough to use for this
purpose.  I think this patch won't be needed once we address the
concerns in patch 2 - and more generally if we discover it is needed
this should just be rolled into patch 2 rather than kept separate.

~Gregory