linux-kernel - Re: [PATCH 5/6] mm/memcontrol: support MEMORY_DEVICE_PRIVATE and MEMORY_DEVICE

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Message-ID: <1500282938.8256.9.camel@gmail.com>
Date:   Mon, 17 Jul 2017 19:15:38 +1000
From:   Balbir Singh <bsingharora@...il.com>
To:     Jérôme Glisse <jglisse@...hat.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     John Hubbard <jhubbard@...dia.com>,
        David Nellans <dnellans@...dia.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        cgroups@...r.kernel.org
Subject: Re: [PATCH 5/6] mm/memcontrol: support MEMORY_DEVICE_PRIVATE and
 MEMORY_DEVICE_PUBLIC v3

On Thu, 2017-07-13 at 17:15 -0400, Jérôme Glisse wrote:
> HMM pages (private or public device pages) are ZONE_DEVICE page and
> thus need special handling when it comes to lru or refcount. This
> patch make sure that memcontrol properly handle those when it face
> them. Those pages are use like regular pages in a process address
> space either as anonymous page or as file back page. So from memcg
> point of view we want to handle them like regular page for now at
> least.
> 
> Changed since v2:
>   - s/host/public
> Changed since v1:
>   - s/public/host
>   - add comments explaining how device memory behave and why
> 
> Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Michal Hocko <mhocko@...nel.org>
> Cc: Vladimir Davydov <vdavydov.dev@...il.com>
> Cc: cgroups@...r.kernel.org
> ---

Acked-by: Balbir Singh <bsingharora@...il.com>