linux-kernel - Re: [RFC PATCH] mm, hugetlb: implement movable_gigantic

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Message-ID: <aPZFt05GcyTkGNQ5@gourry-fedora-PF4VCD3F>
Date: Mon, 20 Oct 2025 10:22:47 -0400
From: Gregory Price <gourry@...rry.net>
To: David Hildenbrand <david@...hat.com>
Cc: linux-mm@...ck.org, osalvador@...e.de, corbet@....net,
	muchun.song@...ux.dev, akpm@...ux-foundation.org,
	hannes@...xchg.org, laoar.shao@...il.com, mclapinski@...gle.com,
	joel.granados@...nel.org, jack@...e.cz, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, Mel Gorman <mgorman@...e.de>,
	Michal Hocko <mhocko@...e.com>,
	Alexandru Moise <00moses.alexander00@...il.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [RFC PATCH] mm, hugetlb: implement movable_gigantic_pages sysctl

On Mon, Oct 20, 2025 at 04:17:06PM +0200, David Hildenbrand wrote:
> On 09.10.25 18:15, Gregory Price wrote:
> 
> However, it also means that we won't try moving 2MB folios to free up a 1GB
> folio.
>

This may actually explain some other behavior we've been seeing, re:
reliability of 1GB allocations.  Let me ask some folks to look at this.

Thanks David,
~Gregory