linux-kernel - Re: [PATCH] mm/hmm: kconfig split HMM address space mirroring from device memory

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Message-ID: <20190414065709.GH3201@mtr-leonro.mtl.com>
Date:   Sun, 14 Apr 2019 06:57:12 +0000
From:   Leon Romanovsky <leonro@...lanox.com>
To:     "jglisse@...hat.com" <jglisse@...hat.com>
CC:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ralph Campbell <rcampbell@...dia.com>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH] mm/hmm: kconfig split HMM address space mirroring from
 device memory

On Thu, Apr 11, 2019 at 02:03:26PM -0400, jglisse@...hat.com wrote:
> From: Jérôme Glisse <jglisse@...hat.com>
>
> To allow building device driver that only care about address space
> mirroring (like RDMA ODP) on platform that do not have all the pre-
> requisite for HMM device memory (like ZONE_DEVICE on ARM) split the
> HMM_MIRROR option dependency from the HMM_DEVICE dependency.
>
> Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
> Cc: Leon Romanovsky <leonro@...lanox.com>
> Cc: Jason Gunthorpe <jgg@...lanox.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Ralph Campbell <rcampbell@...dia.com>
> Cc: John Hubbard <jhubbard@...dia.com>
> ---
>  mm/Kconfig | 17 ++++++++++-------
>  1 file changed, 10 insertions(+), 7 deletions(-)
>

Thanks,

It gave me an option simply enable HMM_MIRROR without too much hassle as
it was before and compile your v3 [1].

Tested-by: Leon Romanovsky <leonro@...lanox.com>

[1] https://patchwork.kernel.org/patch/10894281/