From: Jerome Glisse <jglisse@redhat.com>
To: Balbir Singh <bsingharora@gmail.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, John Hubbard <jhubbard@nvidia.com>,
Dan Williams <dan.j.williams@intel.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [HMM v13 04/18] mm/ZONE_DEVICE/free-page: callback when page is freed
Date: Sun, 20 Nov 2016 23:57:23 -0500 [thread overview]
Message-ID: <20161121045722.GB7872@redhat.com> (raw)
In-Reply-To: <7ec714d6-6779-5abf-0607-862acddfbd4a@gmail.com>
On Mon, Nov 21, 2016 at 12:49:55PM +1100, Balbir Singh wrote:
> On 19/11/16 05:18, Jerome Glisse wrote:
> > When a ZONE_DEVICE page refcount reach 1 it means it is free and nobody
> > is holding a reference on it (only device to which the memory belong do).
> > Add a callback and call it when that happen so device driver can implement
> > their own free page management.
> >
>
> Could you give an example of what their own free page management might look like?
Well hard to do that, the free management is whatever the device driver want to do.
So i don't have any example to give. Each device driver (especialy GPU ones) have
their own memory management with little commonality.
So how the device driver manage that memory is really not important, at least it is
not something for which i want to impose a policy onto driver. I want to leave each
device driver decide on how to achieve that.
Cheers,
Jerome
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next prev parent reply other threads:[~2016-11-21 4:57 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-18 18:18 [HMM v13 00/18] HMM (Heterogeneous Memory Management) v13 Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 01/18] mm/memory/hotplug: convert device parameter bool to set of flags Jérôme Glisse
2016-11-21 0:44 ` Balbir Singh
2016-11-21 4:53 ` Jerome Glisse
2016-11-21 6:57 ` Anshuman Khandual
2016-11-21 12:19 ` Jerome Glisse
2016-11-21 6:41 ` Anshuman Khandual
2016-11-21 12:27 ` Jerome Glisse
2016-11-22 5:35 ` Anshuman Khandual
2016-11-22 14:08 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 02/18] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory Jérôme Glisse
2016-11-21 8:06 ` Anshuman Khandual
2016-11-21 12:33 ` Jerome Glisse
2016-11-22 5:15 ` Anshuman Khandual
2016-11-18 18:18 ` [HMM v13 03/18] mm/ZONE_DEVICE/free_hot_cold_page: catch ZONE_DEVICE pages Jérôme Glisse
2016-11-21 8:18 ` Anshuman Khandual
2016-11-21 12:50 ` Jerome Glisse
2016-11-22 4:30 ` Anshuman Khandual
2016-11-18 18:18 ` [HMM v13 04/18] mm/ZONE_DEVICE/free-page: callback when page is freed Jérôme Glisse
2016-11-21 1:49 ` Balbir Singh
2016-11-21 4:57 ` Jerome Glisse [this message]
2016-11-21 8:26 ` Anshuman Khandual
2016-11-21 12:34 ` Jerome Glisse
2016-11-22 5:02 ` Anshuman Khandual
2016-11-18 18:18 ` [HMM v13 05/18] mm/ZONE_DEVICE/devmem_pages_remove: allow early removal of device memory Jérôme Glisse
2016-11-21 10:37 ` Anshuman Khandual
2016-11-21 12:39 ` Jerome Glisse
2016-11-22 4:54 ` Anshuman Khandual
2016-11-18 18:18 ` [HMM v13 06/18] mm/ZONE_DEVICE/unaddressable: add special swap for unaddressable Jérôme Glisse
2016-11-21 2:06 ` Balbir Singh
2016-11-21 5:05 ` Jerome Glisse
2016-11-22 2:19 ` Balbir Singh
2016-11-22 13:59 ` Jerome Glisse
2016-11-21 11:10 ` Anshuman Khandual
2016-11-21 10:58 ` Anshuman Khandual
2016-11-21 12:42 ` Jerome Glisse
2016-11-22 4:48 ` Anshuman Khandual
2016-11-24 13:56 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 07/18] mm/ZONE_DEVICE/x86: add support for un-addressable device memory Jérôme Glisse
2016-11-21 2:08 ` Balbir Singh
2016-11-21 5:08 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 08/18] mm/hmm: heterogeneous memory management (HMM for short) Jérôme Glisse
2016-11-21 2:29 ` Balbir Singh
2016-11-21 5:14 ` Jerome Glisse
2016-11-23 4:03 ` Anshuman Khandual
2016-11-27 13:10 ` Jerome Glisse
2016-11-28 2:58 ` Anshuman Khandual
2016-11-28 9:41 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 09/18] mm/hmm/mirror: mirror process address space on device with HMM helpers Jérôme Glisse
2016-11-21 2:42 ` Balbir Singh
2016-11-21 5:18 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 10/18] mm/hmm/mirror: add range lock helper, prevent CPU page table update for the range Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 11/18] mm/hmm/mirror: add range monitor helper, to monitor CPU page table update Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 12/18] mm/hmm/mirror: helper to snapshot CPU page table Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 13/18] mm/hmm/mirror: device page fault handler Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 14/18] mm/hmm/migrate: support un-addressable ZONE_DEVICE page in migration Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 15/18] mm/hmm/migrate: add new boolean copy flag to migratepage() callback Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 16/18] mm/hmm/migrate: new memory migration helper for use with device memory Jérôme Glisse
2016-11-18 19:57 ` Aneesh Kumar K.V
2016-11-18 20:15 ` Jerome Glisse
2016-11-19 14:32 ` Aneesh Kumar K.V
2016-11-19 17:17 ` Jerome Glisse
2016-11-20 18:21 ` Aneesh Kumar K.V
2016-11-20 20:06 ` Jerome Glisse
2016-11-21 3:30 ` Balbir Singh
2016-11-21 5:31 ` Jerome Glisse
2016-11-18 18:18 ` [HMM v13 17/18] mm/hmm/devmem: device driver helper to hotplug ZONE_DEVICE memory Jérôme Glisse
2016-11-18 18:18 ` [HMM v13 18/18] mm/hmm/devmem: dummy HMM device as an helper for " Jérôme Glisse
2016-11-19 0:41 ` [HMM v13 00/18] HMM (Heterogeneous Memory Management) v13 John Hubbard
2016-11-19 14:50 ` Aneesh Kumar K.V
2016-11-23 9:16 ` Haggai Eran
2016-11-25 16:16 ` Jerome Glisse
2016-11-27 13:27 ` Haggai Eran
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