From: Keith Busch <kbusch@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
Matthew Wilcox <willy@infradead.org>,
linux-kernel@vger.kernel.org,
Joao Martins <joao.m.martins@oracle.com>,
John Hubbard <jhubbard@nvidia.com>,
Logan Gunthorpe <logang@deltatee.com>,
Ming Lei <ming.lei@redhat.com>,
linux-block@vger.kernel.org, netdev@vger.kernel.org,
linux-mm@kvack.org, linux-rdma@vger.kernel.org,
dri-devel@lists.freedesktop.org, nvdimm@lists.linux.dev
Subject: Re: Phyr Starter
Date: Thu, 20 Jan 2022 07:27:36 -0800 [thread overview]
Message-ID: <20220120152736.GB383746@dhcp-10-100-145-180.wdc.com> (raw)
In-Reply-To: <20220120135602.GA11223@lst.de>
On Thu, Jan 20, 2022 at 02:56:02PM +0100, Christoph Hellwig wrote:
> - on the input side to dma mapping the bio_vecs (or phyrs) are chained
> as bios or whatever the containing structure is. These already exist
> and have infrastructure at least in the block layer
> - on the output side I plan for two options:
>
> 1) we have a sane IOMMU and everyting will be coalesced into a
> single dma_range. This requires setting the block layer
> merge boundary to match the IOMMU page size, but that is
> a very good thing to do anyway.
It doesn't look like IOMMU page sizes are exported, or even necessarily
consistently sized on at least one arch (power).
next prev parent reply other threads:[~2022-01-20 15:27 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-10 19:34 Phyr Starter Matthew Wilcox
2022-01-11 0:41 ` Jason Gunthorpe
2022-01-11 4:32 ` Matthew Wilcox
2022-01-11 15:01 ` Jason Gunthorpe
2022-01-11 18:33 ` Matthew Wilcox
2022-01-11 20:21 ` Jason Gunthorpe
2022-01-11 21:25 ` Matthew Wilcox
2022-01-11 22:09 ` Logan Gunthorpe
2022-01-11 22:57 ` Jason Gunthorpe
2022-01-11 23:02 ` Logan Gunthorpe
2022-01-11 22:53 ` Jason Gunthorpe
2022-01-11 22:57 ` Logan Gunthorpe
2022-01-11 23:02 ` Jason Gunthorpe
2022-01-11 23:08 ` Logan Gunthorpe
2022-01-12 18:37 ` Matthew Wilcox
2022-01-12 19:08 ` Jason Gunthorpe
2022-01-20 14:03 ` Christoph Hellwig
2022-01-20 17:17 ` Jason Gunthorpe
2022-01-20 14:00 ` Christoph Hellwig
2022-01-11 9:05 ` Daniel Vetter
2022-01-11 20:26 ` Jason Gunthorpe
2022-01-20 14:09 ` Christoph Hellwig
2022-01-20 13:56 ` Christoph Hellwig
2022-01-20 15:27 ` Keith Busch [this message]
2022-01-20 15:28 ` Christoph Hellwig
2022-01-20 17:54 ` Robin Murphy
2022-01-11 8:17 ` John Hubbard
2022-01-11 14:01 ` Matthew Wilcox
2022-01-11 15:02 ` Jason Gunthorpe
2022-01-11 17:31 ` Logan Gunthorpe
2022-01-20 14:12 ` Christoph Hellwig
2022-01-20 21:35 ` John Hubbard
2022-01-11 11:40 ` Thomas Zimmermann
2022-01-11 13:56 ` Matthew Wilcox
2022-01-11 14:10 ` Thomas Zimmermann
2022-01-20 13:39 ` Christoph Hellwig
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