Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 6:00 PM, Jerome Glisse wrote: > On Mon, Jan 16, 2017 at 04:58:24PM -0800, Dan Williams wrote: >> On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: >> > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: >> [..] >> >>

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 6:00 PM, Jerome Glisse wrote: > On Mon, Jan 16, 2017 at 04:58:24PM -0800, Dan Williams wrote: >> On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: >> > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: >> [..] >> >> >> dev_pagemap is only meant for

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 04:58:24PM -0800, Dan Williams wrote: > On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: > > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: > [..] > >> >> dev_pagemap is only meant for get_user_pages() to do lookups of ptes > >> >>

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 04:58:24PM -0800, Dan Williams wrote: > On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: > > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: > [..] > >> >> dev_pagemap is only meant for get_user_pages() to do lookups of ptes > >> >> with _PAGE_DEVMAP

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: [..] >> >> dev_pagemap is only meant for get_user_pages() to do lookups of ptes >> >> with _PAGE_DEVMAP and take a reference against the hosting device.. >> >

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 12:13 PM, Jerome Glisse wrote: > On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: [..] >> >> dev_pagemap is only meant for get_user_pages() to do lookups of ptes >> >> with _PAGE_DEVMAP and take a reference against the hosting device.. >> > >> > And i want to

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: > On Mon, Jan 16, 2017 at 7:17 AM, Jerome Glisse wrote: > > On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: > >> On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > >> > This

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 11:31:39AM -0800, Dan Williams wrote: > On Mon, Jan 16, 2017 at 7:17 AM, Jerome Glisse wrote: > > On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: > >> On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > >> > This add support for un-addressable device

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 7:17 AM, Jerome Glisse wrote: > On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: >> On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: >> > This add support for un-addressable device memory. Such memory is hotpluged

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Mon, Jan 16, 2017 at 7:17 AM, Jerome Glisse wrote: > On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: >> On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: >> > This add support for un-addressable device memory. Such memory is hotpluged >> > only so we can have struct page but

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: > On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > > This add support for un-addressable device memory. Such memory is hotpluged > > only so we can have struct page but we should never map them as such memory

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Sun, Jan 15, 2017 at 11:05:43PM -0800, Dan Williams wrote: > On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > > This add support for un-addressable device memory. Such memory is hotpluged > > only so we can have struct page but we should never map them as such memory > > can not be

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > This add support for un-addressable device memory. Such memory is hotpluged > only so we can have struct page but we should never map them as such memory > can not be accessed by CPU. For that reason it uses a special

Re: [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

On Thu, Jan 12, 2017 at 8:30 AM, Jérôme Glisse wrote: > This add support for un-addressable device memory. Such memory is hotpluged > only so we can have struct page but we should never map them as such memory > can not be accessed by CPU. For that reason it uses a special swap entry for > CPU

[HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

This add support for un-addressable device memory. Such memory is hotpluged only so we can have struct page but we should never map them as such memory can not be accessed by CPU. For that reason it uses a special swap entry for CPU page table entry. This patch implement all the logic from

[HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2

This add support for un-addressable device memory. Such memory is hotpluged only so we can have struct page but we should never map them as such memory can not be accessed by CPU. For that reason it uses a special swap entry for CPU page table entry. This patch implement all the logic from