linux-kernel - Re: [HMM v13 05/18] mm/ZONE_DEVICE/devmem_pages_remove: allow early removal of device memory

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Date:   Mon, 21 Nov 2016 16:07:46 +0530
From:   Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:     Jérôme Glisse <jglisse@...hat.com>,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Cc:     John Hubbard <jhubbard@...dia.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: Re: [HMM v13 05/18] mm/ZONE_DEVICE/devmem_pages_remove: allow early
 removal of device memory

On 11/18/2016 11:48 PM, Jérôme Glisse wrote:
> HMM wants to remove device memory early before device tear down so add an
> helper to do that.

Could you please explain why HMM wants to remove device memory before
device tear down ?