linux-kernel - Re: [HMM 07/15] mm/ZONE_DEVICE: new type of ZONE

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Date:   Thu, 15 Jun 2017 13:43:25 -0400 (EDT)
From:   Jerome Glisse <jglisse@...hat.com>
To:     zhong jiang <zhongjiang@...wei.com>
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Dan Williams <dan.j.williams@...el.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        John Hubbard <jhubbard@...dia.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: Re: [HMM 07/15] mm/ZONE_DEVICE: new type of ZONE_DEVICE for
 unaddressable memory v3

> On 2017/5/25 1:20, Jérôme Glisse wrote:

[...]

> > diff --git a/mm/Kconfig b/mm/Kconfig
> > index d744cff..f5357ff 100644
> > --- a/mm/Kconfig
> > +++ b/mm/Kconfig
> > @@ -736,6 +736,19 @@ config ZONE_DEVICE
> >  
> >  	  If FS_DAX is enabled, then say Y.
> >  
> > +config DEVICE_PRIVATE
> > +	bool "Unaddressable device memory (GPU memory, ...)"
> > +	depends on X86_64
> > +	depends on ZONE_DEVICE
> > +	depends on MEMORY_HOTPLUG
> > +	depends on MEMORY_HOTREMOVE
> > +	depends on SPARSEMEM_VMEMMAP
> > +
>  maybe just depends on ARCH_HAS_HMM is enough.

I have updated that as part of HMM CDM patchset.