Re: [PATCH 6/6] mm: proc: Avoid fullmm flush for young/dirty bit toggling

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To: Yu Zhao <yuzhao@xxxxxxxxxx>
Subject: Re: [PATCH 6/6] mm: proc: Avoid fullmm flush for young/dirty bit toggling
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Tue, 24 Nov 2020 15:46:53 +0100
Cc: Will Deacon <will@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, kernel-team@xxxxxxxxxxx, Catalin Marinas <catalin.marinas@xxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Anshuman Khandual <anshuman.khandual@xxxxxxx>, linux-mm@xxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20201120204005.GC1303870@google.com>
References: <20201120143557.6715-1-will@kernel.org> <20201120143557.6715-7-will@kernel.org> <20201120204005.GC1303870@google.com>

On Fri, Nov 20, 2020 at 01:40:05PM -0700, Yu Zhao wrote:

> It seems to me ARM's interpretation of tlb->fullmm is a special case,
> not the other way around.

I don't think ARM is special here, IIRC there were more architectures
that did that.

References:
- [PATCH 0/6] tlb: Fix access and (soft-)dirty bit management
  - From: Will Deacon
- [PATCH 6/6] mm: proc: Avoid fullmm flush for young/dirty bit toggling
  - From: Will Deacon
- Re: [PATCH 6/6] mm: proc: Avoid fullmm flush for young/dirty bit toggling
  - From: Yu Zhao

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