Re: [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper

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To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper
From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Date: Thu, 14 Dec 2017 03:42:36 +0300
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
In-reply-to: <20171213163639.7e1fb5c4082888d2e399b310@linux-foundation.org>
References: <20171213105756.69879-1-kirill.shutemov@linux.intel.com> <20171213105756.69879-10-kirill.shutemov@linux.intel.com> <20171213160951.249071f2aecdccb38b6bb646@linux-foundation.org> <20171214003318.xli42qgybplln754@node.shutemov.name> <20171213163639.7e1fb5c4082888d2e399b310@linux-foundation.org>
User-agent: NeoMutt/20171208

On Wed, Dec 13, 2017 at 04:36:39PM -0800, Andrew Morton wrote:
> So how the heck do we test this?  Add an artificial delay on the other
> side to open the race window?

I'll look tomorrow how we can provide proper testing for the corner case.

-- 
 Kirill A. Shutemov

References:
- [PATCHv4 00/12] Do not lose dirty bit on THP pages
  - From: Kirill A. Shutemov
- [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper
  - From: Kirill A. Shutemov
- Re: [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper
  - From: Andrew Morton
- Re: [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper
  - From: Kirill A. Shutemov
- Re: [PATCHv4 09/12] x86/mm: Provide pmdp_establish() helper
  - From: Andrew Morton

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