From: Balbir Singh <bsingharora@gmail.com>
To: "Jérôme Glisse" <jglisse@redhat.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, John Hubbard <jhubbard@nvidia.com>,
Russell King <linux@armlinux.org.uk>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
Chris Metcalf <cmetcalf@mellanox.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [HMM v16 01/15] mm/memory/hotplug: convert device bool to int to allow for more flags v2
Date: Fri, 13 Jan 2017 19:27:41 +0530 [thread overview]
Message-ID: <20170113135741.GA26827@localhost.localdomain> (raw)
In-Reply-To: <1484238642-10674-2-git-send-email-jglisse@redhat.com>
On Thu, Jan 12, 2017 at 11:30:28AM -0500, Jérôme Glisse wrote:
> When hotpluging memory we want more informations on the type of memory and
> its properties. Replace the device boolean flag by an int and define a set
> of flags.
>
> New property for device memory is an opt-in flag to allow page migration
> from and to a ZONE_DEVICE. Existing user of ZONE_DEVICE are not expecting
> page migration to work for their pages. New changes to page migration i
> changing that and we now need a flag to explicitly opt-in page migration.
Given that ZONE_DEVICE is dependent on X86_64, do we need to touch all
architectures? I guess we could selectively enable things as we enable
ZONE_DEVICE for other architectures?
Balbir Singh.
WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <bsingharora@gmail.com>
To: "Jérôme Glisse" <jglisse@redhat.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, John Hubbard <jhubbard@nvidia.com>,
Russell King <linux@armlinux.org.uk>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
Chris Metcalf <cmetcalf@mellanox.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [HMM v16 01/15] mm/memory/hotplug: convert device bool to int to allow for more flags v2
Date: Fri, 13 Jan 2017 19:27:41 +0530 [thread overview]
Message-ID: <20170113135741.GA26827@localhost.localdomain> (raw)
In-Reply-To: <1484238642-10674-2-git-send-email-jglisse@redhat.com>
On Thu, Jan 12, 2017 at 11:30:28AM -0500, Jerome Glisse wrote:
> When hotpluging memory we want more informations on the type of memory and
> its properties. Replace the device boolean flag by an int and define a set
> of flags.
>
> New property for device memory is an opt-in flag to allow page migration
> from and to a ZONE_DEVICE. Existing user of ZONE_DEVICE are not expecting
> page migration to work for their pages. New changes to page migration i
> changing that and we now need a flag to explicitly opt-in page migration.
Given that ZONE_DEVICE is dependent on X86_64, do we need to touch all
architectures? I guess we could selectively enable things as we enable
ZONE_DEVICE for other architectures?
Balbir Singh.
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next prev parent reply other threads:[~2017-01-13 13:57 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 16:30 [HMM v16 00/16] HMM (Heterogeneous Memory Management) v16 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 01/15] mm/memory/hotplug: convert device bool to int to allow for more flags v2 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-13 13:57 ` Balbir Singh [this message]
2017-01-13 13:57 ` Balbir Singh
2017-01-13 14:45 ` Jerome Glisse
2017-01-13 14:45 ` Jerome Glisse
2017-01-12 16:30 ` [HMM v16 02/15] mm/ZONE_DEVICE/devmem_pages_remove: allow early removal of device memory v2 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 03/15] mm/ZONE_DEVICE/free-page: callback when page is freed Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 04/15] mm/ZONE_DEVICE/unaddressable: add support for un-addressable device memory v2 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-16 7:05 ` Dan Williams
2017-01-16 7:05 ` Dan Williams
2017-01-16 15:17 ` Jerome Glisse
2017-01-16 15:17 ` Jerome Glisse
2017-01-16 19:31 ` Dan Williams
2017-01-16 19:31 ` Dan Williams
2017-01-16 20:13 ` Jerome Glisse
2017-01-16 20:13 ` Jerome Glisse
2017-01-17 0:58 ` Dan Williams
2017-01-17 0:58 ` Dan Williams
2017-01-17 2:00 ` Jerome Glisse
2017-01-17 2:00 ` Jerome Glisse
2017-01-17 2:57 ` Dan Williams
2017-01-17 2:57 ` Dan Williams
2017-01-12 16:30 ` [HMM v16 05/15] mm/ZONE_DEVICE/x86: add support for un-addressable device memory Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 06/15] mm/hmm: heterogeneous memory management (HMM for short) Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 07/15] mm/hmm/mirror: mirror process address space on device with HMM helpers Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 08/15] mm/hmm/mirror: helper to snapshot CPU page table Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 09/15] mm/hmm/mirror: device page fault handler Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 10/15] mm/hmm/migrate: support un-addressable ZONE_DEVICE page in migration Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 11/15] mm/hmm/migrate: add new boolean copy flag to migratepage() callback Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 12/15] mm/hmm/migrate: new memory migration helper for use with device memory v2 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 13/15] mm/hmm/migrate: optimize page map once in vma being migrated Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 14/15] mm/hmm/devmem: device driver helper to hotplug ZONE_DEVICE memory v2 Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
2017-01-12 16:30 ` [HMM v16 15/15] mm/hmm/devmem: dummy HMM device as an helper for ZONE_DEVICE memory Jérôme Glisse
2017-01-12 16:30 ` Jérôme Glisse
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