From: Dave Hansen <dave.hansen@intel.com>
To: "Jérôme Glisse" <jglisse@redhat.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: John Hubbard <jhubbard@nvidia.com>,
David Nellans <dnellans@nvidia.com>,
cgroups@vger.kernel.org, Dan Williams <dan.j.williams@intel.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Balbir Singh <balbirs@au1.ibm.com>,
Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [HMM-CDM 0/5] Cache coherent device memory (CDM) with HMM
Date: Wed, 14 Jun 2017 14:20:23 -0700 [thread overview]
Message-ID: <8219f8fb-65bb-7c6b-6c4c-acc0601c1e0f@intel.com> (raw)
In-Reply-To: <20170614201144.9306-1-jglisse@redhat.com>
On 06/14/2017 01:11 PM, JA(C)rA'me Glisse wrote:
> Cache coherent device memory apply to architecture with system bus
> like CAPI or CCIX. Device connected to such system bus can expose
> their memory to the system and allow cache coherent access to it
> from the CPU.
How does this interact with device memory that's enumerated in the new
ACPI 6.2 HMAT? That stuff is also in the normal e820 and, by default,
treated as normal system RAM. Would this mechanism be used for those
devices as well?
http://www.uefi.org/sites/default/files/resources/ACPI_6_2.pdf
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next prev parent reply other threads:[~2017-06-14 21:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-14 20:11 [HMM-CDM 0/5] Cache coherent device memory (CDM) with HMM Jérôme Glisse
2017-06-14 20:11 ` [HMM-CDM 1/5] mm/device-public-memory: device memory cache coherent with CPU Jérôme Glisse
2017-06-14 20:11 ` [HMM-CDM 2/5] mm/hmm: add new helper to hotplug CDM memory region Jérôme Glisse
2017-06-15 4:28 ` Balbir Singh
2017-06-14 20:11 ` [HMM-CDM 3/5] mm/memcontrol: allow to uncharge page without using page->lru field Jérôme Glisse
2017-06-15 3:31 ` Balbir Singh
2017-06-15 15:35 ` Jerome Glisse
2017-06-14 20:11 ` [HMM-CDM 4/5] mm/memcontrol: support MEMORY_DEVICE_PRIVATE and MEMORY_DEVICE_PUBLIC Jérôme Glisse
2017-06-15 1:41 ` Balbir Singh
2017-06-15 2:04 ` Jerome Glisse
2017-06-15 3:10 ` Balbir Singh
2017-06-14 20:11 ` [HMM-CDM 5/5] mm/hmm: simplify kconfig and enable HMM and DEVICE_PUBLIC for ppc64 Jérôme Glisse
2017-06-14 23:10 ` John Hubbard
2017-06-15 2:09 ` Jerome Glisse
2017-06-15 3:15 ` John Hubbard
2017-06-15 1:46 ` Balbir Singh
2017-06-15 2:07 ` Jerome Glisse
2017-06-15 2:59 ` Balbir Singh
2017-06-14 21:20 ` Dave Hansen [this message]
2017-06-14 21:38 ` [HMM-CDM 0/5] Cache coherent device memory (CDM) with HMM Jerome Glisse
2017-06-14 21:58 ` Dave Hansen
2017-06-14 22:07 ` Benjamin Herrenschmidt
2017-06-14 23:40 ` Balbir Singh
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