Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure

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To: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Tue, 29 Aug 2017 10:15:08 +0200
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>, Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx>, paulmck@xxxxxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, mhocko@xxxxxxxxxx, dave@xxxxxxxxxxxx, jack@xxxxxxx, Matthew Wilcox <willy@xxxxxxxxxxxxx>, mpe@xxxxxxxxxxxxxx, paulus@xxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, hpa@xxxxxxxxx, Will Deacon <will.deacon@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, haren@xxxxxxxxxxxxxxxxxx, khandual@xxxxxxxxxxxxxxxxxx, npiggin@xxxxxxxxx, bsingharora@xxxxxxxxx, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, x86@xxxxxxxxxx
In-reply-to: <20170828223511.GM28715@tassilo.jf.intel.com>
References: <1503007519-26777-1-git-send-email-ldufour@linux.vnet.ibm.com> <1503007519-26777-15-git-send-email-ldufour@linux.vnet.ibm.com> <20170827001823.n5wgkfq36z6snvf2@node.shutemov.name> <20170828093727.5wldedputadanssh@hirez.programming.kicks-ass.net> <1503954877.4850.19.camel@kernel.crashing.org> <20170828223511.GM28715@tassilo.jf.intel.com>
User-agent: NeoMutt/20170609 (1.8.3)

On Mon, Aug 28, 2017 at 03:35:11PM -0700, Andi Kleen wrote:
> Yes the whole thing is quite risky. Probably will need some
> kind of per architecture opt-in scheme?

See patch 19/20, that not enough for you?

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References:
- [PATCH v2 00/20] Speculative page faults
  - From: Laurent Dufour
- [PATCH v2 14/20] mm: Provide speculative fault infrastructure
  - From: Laurent Dufour
- Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
  - From: Kirill A. Shutemov
- Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
  - From: Peter Zijlstra
- Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
  - From: Benjamin Herrenschmidt
- Re: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
  - From: Andi Kleen

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