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Subject: -mm maintainer? WAS Re: [PATCH v6 0/8] Emulated coherent graphics
 memory take 2
To:     =?UTF-8?Q?Thomas_Hellstr=c3=b6m_=28VMware=29?= 
        <thomas_os@shipmail.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
        "Kirill A . Shutemov" <kirill@shutemov.name>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Matthew Wilcox <willy@infradead.org>,
        Will Deacon <will.deacon@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Rik van Riel <riel@surriel.com>,
        Minchan Kim <minchan@kernel.org>,
        Michal Hocko <mhocko@suse.com>,
        Huang Ying <ying.huang@intel.com>,
        =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>
References: <20191014132204.7721-1-thomas_os@shipmail.org>
From:   =?UTF-8?Q?Thomas_Hellstr=c3=b6m_=28VMware=29?= 
        <thomas_os@shipmail.org>
Organization: VMware Inc.
Message-ID: <a31f0d40-d8a5-faca-016b-0066f5ac31a2@shipmail.org>
Date:   Mon, 4 Nov 2019 10:21:26 +0100
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Hi, All,

On 10/14/19 3:22 PM, Thomas Hellström (VMware) wrote:
> From: Thomas Hellström <thellstrom@vmware.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