linux-kernel - Re: [PATCHv3 15/17] x86/mm: Implement sync_direct

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Date:   Wed, 13 Jun 2018 11:41:21 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Tom Lendacky <thomas.lendacky@....com>
Cc:     Kai Huang <kai.huang@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv3 15/17] x86/mm: Implement sync_direct_mapping()

On 06/12/2018 07:39 AM, Kirill A. Shutemov wrote:
>  arch/x86/include/asm/mktme.h |   6 +
>  arch/x86/mm/init_64.c        |   6 +
>  arch/x86/mm/mktme.c          | 444 +++++++++++++++++++++++++++++++++++
>  3 files changed, 456 insertions(+)

Can we not do any better than 400 lines of new open-coded pagetable
hacking?