From: Christoph Hellwig <hch@lst.de>
To: Chaitanya Kulkarni <chaitanyak@nvidia.com>
Cc: "Christoph Hellwig" <hch@lst.de>,
"Leon Romanovsky" <leon@kernel.org>,
"Jens Axboe" <axboe@kernel.dk>, "Jason Gunthorpe" <jgg@ziepe.ca>,
"Robin Murphy" <robin.murphy@arm.com>,
"Joerg Roedel" <joro@8bytes.org>, "Will Deacon" <will@kernel.org>,
"Keith Busch" <kbusch@kernel.org>,
"Zeng, Oak" <oak.zeng@intel.com>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Logan Gunthorpe" <logang@deltatee.com>,
"Yishai Hadas" <yishaih@nvidia.com>,
"Shameer Kolothum" <shameerali.kolothum.thodi@huawei.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API
Date: Sat, 6 Jul 2024 08:26:04 +0200 [thread overview]
Message-ID: <20240706062604.GA13874@lst.de> (raw)
In-Reply-To: <a7f1c69a-bbaf-4263-b2c2-3c92d65522c2@nvidia.com>
On Fri, Jul 05, 2024 at 10:53:06PM +0000, Chaitanya Kulkarni wrote:
> I tried to reproduce this issue somehow it is not reproducible.
>
> I'll try again on Leon's setup on my Saturday night, to fix that
> case.
It is passthrough I/O from userspace. The address is not page aligned
as seen in the printk. Forcing bounce buffering of all passthrough
I/O makes it go away.
The problem is the first mapped segment does not have to be aligned
and we're missing the code to places it at the aligned offset into
the IOVA space.
next prev parent reply other threads:[~2024-07-06 6:26 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-02 9:09 [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 01/18] dma-mapping: query DMA memory type Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 02/18] dma-mapping: provide an interface to allocate IOVA Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 03/18] dma-mapping: check if IOVA can be used Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 04/18] dma-mapping: implement link range API Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 05/18] mm/hmm: let users to tag specific PFN with DMA mapped bit Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 06/18] dma-mapping: provide callbacks to link/unlink HMM PFNs to specific IOVA Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 07/18] iommu/dma: Provide an interface to allow preallocate IOVA Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 08/18] iommu/dma: Implement link/unlink ranges callbacks Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 09/18] RDMA/umem: Preallocate and cache IOVA for UMEM ODP Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 10/18] RDMA/umem: Store ODP access mask information in PFN Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 11/18] RDMA/core: Separate DMA mapping to caching IOVA and page linkage Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 12/18] RDMA/umem: Prevent UMEM ODP creation with SWIOTLB Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 13/18] vfio/mlx5: Explicitly use number of pages instead of allocated length Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 14/18] vfio/mlx5: Rewrite create mkey flow to allow better code reuse Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 15/18] vfio/mlx5: Explicitly store page list Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 16/18] vfio/mlx5: Convert vfio to use DMA link API Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 17/18] block: export helper to get segment max size Leon Romanovsky
2024-07-02 9:09 ` [RFC PATCH v1 18/18] nvme-pci: use new dma API Leon Romanovsky
2024-07-04 15:23 ` Robin Murphy
2024-07-04 17:16 ` Leon Romanovsky
2024-07-05 5:58 ` Christoph Hellwig
2024-07-05 18:48 ` Leon Romanovsky
2024-07-06 6:08 ` Christoph Hellwig
2024-07-03 5:42 ` [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API Christoph Hellwig
2024-07-03 10:42 ` Zhu Yanjun
2024-07-03 10:52 ` Leon Romanovsky
2024-07-03 14:35 ` Christoph Hellwig
2024-07-03 15:51 ` Leon Romanovsky
2024-07-04 7:48 ` Christoph Hellwig
2024-07-04 13:18 ` Leon Romanovsky
2024-07-05 6:00 ` Christoph Hellwig
2024-07-08 16:52 ` Jason Gunthorpe
2024-07-09 6:17 ` Christoph Hellwig
2024-07-09 18:53 ` Jason Gunthorpe
2024-07-10 6:27 ` Christoph Hellwig
2024-07-11 23:21 ` Jason Gunthorpe
2024-07-05 22:53 ` Chaitanya Kulkarni
2024-07-06 6:26 ` Christoph Hellwig [this message]
2024-07-07 9:16 ` Leon Romanovsky
2024-07-07 12:45 ` Leon Romanovsky
2024-07-05 6:39 ` Christoph Hellwig
2024-07-07 9:45 ` Leon Romanovsky
2024-07-08 23:57 ` Jason Gunthorpe
2024-07-09 6:20 ` Christoph Hellwig
2024-07-09 19:03 ` Jason Gunthorpe
2024-07-10 6:22 ` Christoph Hellwig
2024-07-11 23:29 ` Jason Gunthorpe
2024-07-12 4:54 ` Christoph Hellwig
2024-07-12 12:42 ` Jason Gunthorpe
2024-07-13 5:24 ` Christoph Hellwig
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