linux-kernel - Re: [PATCH v10 2/4] mm: memory_hotplug: override memmap_on_memory when hugetlb_free

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Date:   Thu, 12 May 2022 09:36:15 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Muchun Song <songmuchun@...edance.com>, corbet@....net,
        mike.kravetz@...cle.com, akpm@...ux-foundation.org,
        mcgrof@...nel.org, keescook@...omium.org, yzaikin@...gle.com,
        osalvador@...e.de, masahiroy@...nel.org
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, duanxiongchun@...edance.com, smuchun@...il.com
Subject: Re: [PATCH v10 2/4] mm: memory_hotplug: override memmap_on_memory
 when hugetlb_free_vmemmap=on

On 09.05.22 08:27, Muchun Song wrote:
> Optimizing HugeTLB vmemmap pages is not compatible with allocating memmap on
> hot added memory. If "hugetlb_free_vmemmap=on" and
> memory_hotplug.memmap_on_memory" are both passed on the kernel command line,
> optimizing hugetlb pages takes precedence. 

Why?


-- 
Thanks,

David / dhildenb