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Howlett" , Suren Baghdasaryan , Michal Hocko , Mike Rapoport , Vlastimil Babka , Nicholas Piggin , Michael Ellerman , "Christophe Leroy (CS GROUP)" , Felix Kuehling , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Lyude Paul , Danilo Krummrich , Bjorn Helgaas , Logan Gunthorpe , David Hildenbrand , Oscar Salvador , Andrew Morton , Jason Gunthorpe , Leon Romanovsky , Balbir Singh , Dan Williams , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-fsdevel@vger.kernel.org Subject: [PATCH v4 0/7] Enable THP support in drm_pagemap Date: Sun, 11 Jan 2026 21:55:39 +0100 Message-ID: <20260111205820.830410-1-francois.dugast@intel.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use Balbir Singh's series for device-private THP support [1] and previous preparation work in drm_pagemap [2] to add 2MB/THP support in xe. This leads to significant performance improvements when using SVM with 2MB pages. [1] https://lore.kernel.org/linux-mm/20251001065707.920170-1-balbirs@nvidia.com/ [2] https://patchwork.freedesktop.org/series/151754/ v2: - rebase on top of multi-device SVM - add drm_pagemap_cpages() with temporary patch - address other feedback from Matt Brost on v1 v3: The major change is to remove the dependency to the mm/huge_memory helper migrate_device_split_page() that was called explicitely when a 2M buddy allocation backed by a large folio would be later reused for a smaller allocation (4K or 64K). Instead, the first 3 patches provided by Matthew Brost ensure large folios are split at the time of freeing. v4: - add order argument to folio_free callback - send complete series to linux-mm and MM folks as requested (Zi Yan and Andrew Morton) and cover letter to anyone receiving at least one of the patches (Liam R. Howlett) Cc: Zi Yan Cc: Madhavan Srinivasan Cc: Alistair Popple Cc: Lorenzo Stoakes Cc: Liam R. Howlett Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Mike Rapoport Cc: Vlastimil Babka Cc: Nicholas Piggin Cc: Michael Ellerman Cc: "Christophe Leroy (CS GROUP)" Cc: Felix Kuehling Cc: Alex Deucher Cc: "Christian König" Cc: David Airlie Cc: Simona Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: Lyude Paul Cc: Danilo Krummrich Cc: Bjorn Helgaas Cc: Logan Gunthorpe Cc: David Hildenbrand Cc: Oscar Salvador Cc: Andrew Morton Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Balbir Singh Cc: Dan Williams Cc: Matthew Wilcox Cc: Jan Kara Cc: Alexander Viro Cc: Christian Brauner Cc: linuxppc-dev@lists.ozlabs.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org Cc: linux-pci@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-cxl@vger.kernel.org Cc: nvdimm@lists.linux.dev Cc: linux-fsdevel@vger.kernel.org Francois Dugast (3): drm/pagemap: Unlock and put folios when possible drm/pagemap: Add helper to access zone_device_data drm/pagemap: Enable THP support for GPU memory migration Matthew Brost (4): mm/zone_device: Add order argument to folio_free callback mm/zone_device: Add free_zone_device_folio_prepare() helper fs/dax: Use free_zone_device_folio_prepare() helper drm/pagemap: Correct cpages calculation for migrate_vma_setup arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 2 +- drivers/gpu/drm/drm_gpusvm.c | 7 +- drivers/gpu/drm/drm_pagemap.c | 165 ++++++++++++++++++----- drivers/gpu/drm/nouveau/nouveau_dmem.c | 4 +- drivers/pci/p2pdma.c | 2 +- fs/dax.c | 24 +--- include/drm/drm_pagemap.h | 15 +++ include/linux/memremap.h | 8 +- lib/test_hmm.c | 4 +- mm/memremap.c | 60 ++++++++- 11 files changed, 227 insertions(+), 66 deletions(-) -- 2.43.0