linux-kernel - -mm maintainer? WAS Re: [PATCH v6 0/8] Emulated coherent graphics memory take 2

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Message-ID: <a31f0d40-d8a5-faca-016b-0066f5ac31a2@shipmail.org>
Date:   Mon, 4 Nov 2019 10:21:26 +0100
From:   Thomas Hellström (VMware) 
        <thomas_os@...pmail.org>
To:     Thomas Hellström (VMware) 
        <thomas_os@...pmail.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
        "Kirill A . Shutemov" <kirill@...temov.name>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Will Deacon <will.deacon@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...riel.com>,
        Minchan Kim <minchan@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Huang Ying <ying.huang@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>
Subject: -mm maintainer? WAS Re: [PATCH v6 0/8] Emulated coherent graphics
 memory take 2

Hi, All,

On 10/14/19 3:22 PM, Thomas Hellström (VMware) wrote:
> From: Thomas Hellström <thellstrom@...are.com>
>
> Graphics APIs like OpenGL 4.4 and Vulkan require the graphics driver
> to provide coherent graphics memory, meaning that the GPU sees any
> content written to the coherent memory on the next GPU operation that
> touches that memory, and the CPU sees any content written by the GPU
> to that memory immediately after any fence object trailing the GPU
> operation is signaled.
>
> Paravirtual drivers that otherwise require explicit synchronization
> needs to do this by hooking up dirty tracking to pagefault handlers
> and buffer object validation.
>
> Provide mm helpers needed for this and that also allow for huge pmd-
> and pud entries (patch 1-3), and the associated vmwgfx code (patch 4-7).
>
> The code has been tested and exercised by a tailored version of mesa
> where we disable all explicit synchronization and assume graphics memory
> is coherent. The performance loss varies of course; a typical number is
> around 5%.
>
> I would like to merge this code through the DRM tree, so an ack to include
> the new mm helpers in that merge would be greatly appreciated.
>

I'm a bit confused as how to get this merged? Is there an -mm maintainer 
or who is supposed to ack -mm patches and get them into the kernel?

Any input appreciated,

Thanks,

Thomas