Re: [PATCH v9 23/24] nvme-pci: convert to blk_rq_dma_map

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To: Christoph Hellwig <hch@xxxxxx>
Subject: Re: [PATCH v9 23/24] nvme-pci: convert to blk_rq_dma_map
From: Leon Romanovsky <leon@xxxxxxxxxx>
Date: Sun, 27 Apr 2025 10:10:26 +0300
Cc: Keith Busch <kbusch@xxxxxxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Jake Edge <jake@xxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Zhu Yanjun <zyjzyj2000@xxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Logan Gunthorpe <logang@xxxxxxxxxxxx>, Yishai Hadas <yishaih@xxxxxxxxxx>, Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Jérôme Glisse <jglisse@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Niklas Schnelle <schnelle@xxxxxxxxxxxxx>, Chuck Lever <chuck.lever@xxxxxxxxxx>, Luis Chamberlain <mcgrof@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Kanchan Joshi <joshi.k@xxxxxxxxxxx>, Chaitanya Kulkarni <kch@xxxxxxxxxx>, Nitesh Shetty <nj.shetty@xxxxxxxxxxx>
In-reply-to: <20250423092437.GA1895@lst.de>
References: <cover.1745394536.git.leon@kernel.org> <7c5c5267cba2c03f6650444d4879ba0d13004584.1745394536.git.leon@kernel.org> <20250423092437.GA1895@lst.de>

On Wed, Apr 23, 2025 at 11:24:37AM +0200, Christoph Hellwig wrote:
> I don't think the meta SGL handling is quite right yet, and the
> single segment data handling also regressed.  

If my testing is correct, my dma-split-wip branch passes all tests,
including single segment.

Thanks

References:
- [PATCH v9 00/24] Provide a new two step DMA mapping API
  - From: Leon Romanovsky
- [PATCH v9 23/24] nvme-pci: convert to blk_rq_dma_map
  - From: Leon Romanovsky
- Re: [PATCH v9 23/24] nvme-pci: convert to blk_rq_dma_map
  - From: Christoph Hellwig

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