From: Jason Gunthorpe <jgg@nvidia.com>
To: Demi Marie Obenour <demiobenour@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
Leon Romanovsky <leon@kernel.org>,
Abdiel Janulgue <abdiel.janulgue@gmail.com>,
Alexander Potapenko <glider@google.com>,
Alex Gaynor <alex.gaynor@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Danilo Krummrich <dakr@kernel.org>,
iommu@lists.linux.dev, Jason Wang <jasowang@redhat.com>,
Jens Axboe <axboe@kernel.dk>, Joerg Roedel <joro@8bytes.org>,
Jonathan Corbet <corbet@lwn.net>, Juergen Gross <jgross@suse.com>,
kasan-dev@googlegroups.com, Keith Busch <kbusch@kernel.org>,
linux-block@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-nvme@lists.infradead.org, linuxppc-dev@lists.ozlabs.org,
linux-trace-kernel@vger.kernel.org,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
"Michael S. Tsirkin" <mst@redhat.com>,
Miguel Ojeda <ojeda@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
rust-for-linux@vger.kernel.org, Sagi Grimberg <sagi@grimberg.me>,
Stefano Stabellini <sstabellini@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
virtualization@lists.linux.dev, Will Deacon <will@kernel.org>,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH v1 00/16] dma-mapping: migrate to physical address-based API
Date: Sun, 10 Aug 2025 14:02:02 -0300 [thread overview]
Message-ID: <20250810170202.GQ184255@nvidia.com> (raw)
In-Reply-To: <6cbaa3a3-694e-4951-abb3-b88e6c9d6638@gmail.com>
On Sat, Aug 09, 2025 at 12:53:09PM -0400, Demi Marie Obenour wrote:
> > With a long term goal that struct page only exists for legacy code,
> > and is maybe entirely compiled out of modern server kernels.
>
> Why just server kernels? I suspect client systems actually run
> newer kernels than servers do.
I would guess this is because of the people who are interested in this
work. Frankly there isn't much benifit for small memory client
systems. Modern servers have > 1TB of memory and struct page really
hurts here.
The flip side of this is the work is enormous and I think there is a
general idea that the smaller set of server related drivers and
subsystems will get ready well before the wider universe of stuff a
client or android might use.
It is not that more can't happen it just ultimately depends on
interest and time.
Many modern servers use quite new kernels if you ignore the enterprise
distros :\
Jason
prev parent reply other threads:[~2025-08-10 17:02 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-04 12:42 [PATCH v1 00/16] dma-mapping: migrate to physical address-based API Leon Romanovsky
2025-08-04 12:42 ` [PATCH v1 01/16] dma-mapping: introduce new DMA attribute to indicate MMIO memory Leon Romanovsky
2025-08-06 17:31 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 02/16] iommu/dma: handle MMIO path in dma_iova_link Leon Romanovsky
2025-08-06 18:10 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 03/16] dma-debug: refactor to use physical addresses for page mapping Leon Romanovsky
2025-08-06 18:26 ` Jason Gunthorpe
2025-08-06 18:38 ` Leon Romanovsky
2025-08-04 12:42 ` [PATCH v1 04/16] dma-mapping: rename trace_dma_*map_page to trace_dma_*map_phys Leon Romanovsky
2025-08-04 12:42 ` [PATCH v1 05/16] iommu/dma: rename iommu_dma_*map_page to iommu_dma_*map_phys Leon Romanovsky
2025-08-06 18:44 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 06/16] iommu/dma: extend iommu_dma_*map_phys API to handle MMIO memory Leon Romanovsky
2025-08-07 12:07 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 07/16] dma-mapping: convert dma_direct_*map_page to be phys_addr_t based Leon Romanovsky
2025-08-07 12:13 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 08/16] kmsan: convert kmsan_handle_dma to use physical addresses Leon Romanovsky
2025-08-07 12:21 ` Jason Gunthorpe
2025-08-13 15:07 ` Leon Romanovsky
2025-08-14 12:13 ` Jason Gunthorpe
2025-08-14 12:35 ` Leon Romanovsky
2025-08-14 12:44 ` Jason Gunthorpe
2025-08-14 13:31 ` Leon Romanovsky
2025-08-14 14:14 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 09/16] dma-mapping: handle MMIO flow in dma_map|unmap_page Leon Romanovsky
2025-08-07 13:08 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 10/16] xen: swiotlb: Open code map_resource callback Leon Romanovsky
2025-08-07 14:40 ` Jürgen Groß
2025-08-04 12:42 ` [PATCH v1 11/16] dma-mapping: export new dma_*map_phys() interface Leon Romanovsky
2025-08-07 13:38 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 12/16] mm/hmm: migrate to physical address-based DMA mapping API Leon Romanovsky
2025-08-07 13:14 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 13/16] mm/hmm: properly take MMIO path Leon Romanovsky
2025-08-07 13:14 ` Jason Gunthorpe
2025-08-04 12:42 ` [PATCH v1 14/16] block-dma: migrate to dma_map_phys instead of map_page Leon Romanovsky
2025-08-04 12:42 ` [PATCH v1 15/16] block-dma: properly take MMIO path Leon Romanovsky
2025-08-04 12:42 ` [PATCH v1 16/16] nvme-pci: unmap MMIO pages with appropriate interface Leon Romanovsky
2025-08-07 13:45 ` Jason Gunthorpe
2025-08-13 15:37 ` Leon Romanovsky
2025-08-07 14:19 ` [PATCH v1 00/16] dma-mapping: migrate to physical address-based API Jason Gunthorpe
2025-08-08 18:51 ` Marek Szyprowski
2025-08-09 13:34 ` Jason Gunthorpe
2025-08-09 16:53 ` Demi Marie Obenour
2025-08-10 17:02 ` Jason Gunthorpe [this message]
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