Re: [PATCH] mm/thp: Make ARCH_ENABLE_SPLIT_PMD_PTLOCK dependent on PGTABLE_LEVELS > 2

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To: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: Re: [PATCH] mm/thp: Make ARCH_ENABLE_SPLIT_PMD_PTLOCK dependent on PGTABLE_LEVELS > 2
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Mon, 10 May 2021 10:53:13 +0200
Cc: linux-mm@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, Heiko Carstens <hca@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, x86@xxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <1620621345-29176-1-git-send-email-anshuman.khandual@arm.com>
References: <1620621345-29176-1-git-send-email-anshuman.khandual@arm.com>

On Mon, May 10, 2021 at 10:05:45AM +0530, Anshuman Khandual wrote:
> -	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if X86_64 || X86_PAE
> +	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE)

It's still very early on a Monday, but IIRC this new condition is
identical to the pre-existing one.

Follow-Ups:
- Re: [PATCH] mm/thp: Make ARCH_ENABLE_SPLIT_PMD_PTLOCK dependent on PGTABLE_LEVELS > 2
  - From: Anshuman Khandual

References:
- [PATCH] mm/thp: Make ARCH_ENABLE_SPLIT_PMD_PTLOCK dependent on PGTABLE_LEVELS > 2
  - From: Anshuman Khandual

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