From: John Hubbard <jhubbard@nvidia.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Jordan Niethe <jniethe@nvidia.com>
Cc: linux-mm@kvack.org, balbirs@nvidia.com, matthew.brost@intel.com,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
david@redhat.com, ziy@nvidia.com, apopple@nvidia.com,
lorenzo.stoakes@oracle.com, lyude@redhat.com, dakr@kernel.org,
airlied@gmail.com, simona@ffwll.ch, rcampbell@nvidia.com,
mpenttil@redhat.com, jgg@nvidia.com, willy@infradead.org,
linuxppc-dev@lists.ozlabs.org, intel-xe@lists.freedesktop.org,
jgg@ziepe.ca, Felix.Kuehling@amd.com
Subject: Re: [PATCH v2 00/11] Remove device private pages from physical address space
Date: Wed, 7 Jan 2026 17:08:43 -0800 [thread overview]
Message-ID: <71fade9d-be8f-40d1-b580-4fac89a16cc7@nvidia.com> (raw)
In-Reply-To: <20260107120608.5ccd2cc7e4227d2e80028bd9@linux-foundation.org>
On 1/7/26 12:06 PM, Andrew Morton wrote:
> On Wed, 7 Jan 2026 20:18:12 +1100 Jordan Niethe <jniethe@nvidia.com> wrote:
...
> Can you better help us understand the seriousness of these problems?
> How much are our users really hurting from this?
>
A lot! We have been involved in escalations from various customers
who have attempted to enable, say, KASLR and HMM at the same time.
And they ran out of phys address space, forcing them into an awkward
ugly choice of one or the other, often.
This is a huge pain point and a barrier to HMM adoption.
thanks,
--
John Hubbard
next prev parent reply other threads:[~2026-01-08 1:09 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-07 9:18 Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 01/11] mm/migrate_device: Introduce migrate_pfn_from_page() helper Jordan Niethe
2026-01-08 20:03 ` Felix Kuehling
2026-01-08 23:49 ` Jordan Niethe
2026-01-09 21:03 ` Kuehling, Felix
2026-01-09 22:47 ` Balbir Singh
2026-01-07 9:18 ` [PATCH v2 02/11] drm/amdkfd: Use migrate pfns internally Jordan Niethe
2026-01-08 22:00 ` Felix Kuehling
2026-01-08 23:56 ` Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 03/11] mm/migrate_device: Make migrate_device_{pfns,range}() take mpfns Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 04/11] mm/migrate_device: Add migrate PFN flag to track device private pages Jordan Niethe
2026-01-08 20:01 ` Felix Kuehling
2026-01-08 23:41 ` Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 05/11] mm/page_vma_mapped: Add flags to page_vma_mapped_walk::pfn " Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 06/11] mm: Add helpers to create migration entries from struct pages Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 07/11] mm: Add a new swap type for migration entries of device private pages Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 08/11] mm: Add helpers to create device private entries from struct pages Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 09/11] mm/util: Add flag to track device private pages in page snapshots Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 10/11] mm/hmm: Add flag to track device private pages Jordan Niethe
2026-01-07 9:18 ` [PATCH v2 11/11] mm: Remove device private pages from the physical address space Jordan Niethe
2026-01-07 18:36 ` [PATCH v2 00/11] Remove device private pages from " Matthew Brost
2026-01-07 20:21 ` Zi Yan
2026-01-08 2:25 ` Jordan Niethe
2026-01-08 5:42 ` Jordan Niethe
2026-01-09 0:01 ` Jordan Niethe
2026-01-09 0:31 ` Matthew Brost
2026-01-09 1:27 ` Jordan Niethe
2026-01-09 6:22 ` Matthew Brost
2026-01-07 20:06 ` Andrew Morton
2026-01-07 20:54 ` Jason Gunthorpe
2026-01-07 21:02 ` Balbir Singh
2026-01-08 1:29 ` Alistair Popple
2026-01-08 1:08 ` John Hubbard [this message]
2026-01-08 1:49 ` Alistair Popple
2026-01-08 2:55 ` Jordan Niethe
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