linux-kernel - Re: [HMM 16/16] mm/hmm/devmem: dummy HMM device for ZONE

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Date:   Fri, 17 Mar 2017 12:53:51 -0400
From:   Jerome Glisse <jglisse@...hat.com>
To:     Bob Liu <liubo95@...wei.com>
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, John Hubbard <jhubbard@...dia.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        David Nellans <dnellans@...dia.com>,
        Evgeny Baskakov <ebaskakov@...dia.com>,
        Mark Hairgrove <mhairgrove@...dia.com>,
        Sherry Cheung <SCheung@...dia.com>,
        Subhash Gutti <sgutti@...dia.com>
Subject: Re: [HMM 16/16] mm/hmm/devmem: dummy HMM device for ZONE_DEVICE
 memory v2

On Fri, Mar 17, 2017 at 02:55:57PM +0800, Bob Liu wrote:
> Hi Jérôme,
> 
> On 2017/3/17 0:05, Jérôme Glisse wrote:
> > This introduce a dummy HMM device class so device driver can use it to
> > create hmm_device for the sole purpose of registering device memory.
> 
> May I ask where is the latest dummy HMM device driver?
> I can only get this one: https://patchwork.kernel.org/patch/4352061/

https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-next

This is a 4.10 tree but the dummy driver there apply on top of v18

https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-v18

This is really an example driver it doesn't do anything useful beside
help in testing and debugging.

Cheers,
Jérôme