From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: "Leon Romanovsky" <leon@kernel.org>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Robin Murphy" <robin.murphy@arm.com>,
"Joerg Roedel" <joro@8bytes.org>, "Will Deacon" <will@kernel.org>,
"Christoph Hellwig" <hch@lst.de>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Keith Busch" <kbusch@kernel.org>,
"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>,
"Jonathan Corbet" <corbet@lwn.net>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, linux-rdma@vger.kernel.org,
iommu@lists.linux.dev, linux-nvme@lists.infradead.org,
linux-pci@vger.kernel.org, kvm@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH v1 00/17] Provide a new two step DMA mapping API
Date: Thu, 31 Oct 2024 09:34:50 +0100 [thread overview]
Message-ID: <20241031083450.GA30625@lst.de> (raw)
In-Reply-To: <3144b6e7-5c80-46d2-8ddc-a71af3c23072@kernel.dk>
On Wed, Oct 30, 2024 at 07:44:13PM -0600, Jens Axboe wrote:
> On Christoph's request, I tested this series last week and saw some
> pretty significant performance regressions on my box. I don't know what
> the status is in terms of that, just want to make sure something like
> this doesn't get merged until that is both fully understood and sorted
> out.
Working on it, but I have way too many things going on at once. Note
that the weird thing about your setup was that we apparently dropped into
the slow path, which still puzzles me. But I should probably also look
into making that path a little less slow.
next prev parent reply other threads:[~2024-10-31 8:34 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-30 15:12 [PATCH v1 00/17] Provide a new two step DMA mapping API Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 01/17] PCI/P2PDMA: Refactor the p2pdma mapping helpers Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 02/17] dma-mapping: move the PCI P2PDMA mapping helpers to pci-p2pdma.h Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 03/17] iommu: generalize the batched sync after map interface Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 04/17] dma-mapping: Add check if IOVA can be used Leon Romanovsky
2024-11-10 15:09 ` Zhu Yanjun
2024-11-10 15:19 ` Leon Romanovsky
2024-11-11 6:39 ` Christoph Hellwig
2024-11-11 7:19 ` Greg Sword
2024-10-30 15:12 ` [PATCH v1 05/17] dma: Provide an interface to allow allocate IOVA Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 06/17] iommu/dma: Factor out a iommu_dma_map_swiotlb helper Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 07/17] dma-mapping: Implement link/unlink ranges API Leon Romanovsky
2024-10-31 21:18 ` Robin Murphy
2024-11-04 9:10 ` Christoph Hellwig
2024-11-04 12:19 ` Jason Gunthorpe
2024-11-04 12:53 ` Christoph Hellwig
2024-11-07 14:50 ` Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 08/17] dma-mapping: add a dma_need_unmap helper Leon Romanovsky
2024-10-31 21:18 ` Robin Murphy
2024-11-01 11:06 ` Leon Romanovsky
2024-11-04 9:15 ` Christoph Hellwig
2024-10-30 15:12 ` [PATCH v1 09/17] docs: core-api: document the IOVA-based API Leon Romanovsky
2024-10-31 1:41 ` Randy Dunlap
2024-10-31 7:59 ` Leon Romanovsky
2024-11-08 19:34 ` Jonathan Corbet
2024-11-08 20:03 ` Leon Romanovsky
2024-11-08 20:13 ` Jonathan Corbet
2024-11-08 20:27 ` Leon Romanovsky
2024-11-10 10:41 ` Leon Romanovsky
2024-11-11 6:38 ` Christoph Hellwig
2024-11-11 6:43 ` anish kumar
2024-11-11 14:59 ` Jonathan Corbet
2024-10-30 15:12 ` [PATCH v1 10/17] mm/hmm: let users to tag specific PFN with DMA mapped bit Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 11/17] mm/hmm: provide generic DMA managing logic Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 12/17] RDMA/umem: Store ODP access mask information in PFN Leon Romanovsky
2024-10-30 15:12 ` [PATCH v1 13/17] RDMA/core: Convert UMEM ODP DMA mapping to caching IOVA and page linkage Leon Romanovsky
2024-10-30 15:13 ` [PATCH v1 14/17] RDMA/umem: Separate implicit ODP initialization from explicit ODP Leon Romanovsky
2024-10-30 15:13 ` [PATCH v1 15/17] vfio/mlx5: Explicitly use number of pages instead of allocated length Leon Romanovsky
2024-10-30 15:13 ` [PATCH v1 16/17] vfio/mlx5: Rewrite create mkey flow to allow better code reuse Leon Romanovsky
2024-10-30 15:13 ` [PATCH v1 17/17] vfio/mlx5: Convert vfio to use DMA link API Leon Romanovsky
2024-10-31 1:44 ` [PATCH v1 00/17] Provide a new two step DMA mapping API Jens Axboe
2024-10-31 8:34 ` Christoph Hellwig [this message]
2024-10-31 9:05 ` Leon Romanovsky
2024-10-31 9:21 ` Christoph Hellwig
2024-10-31 9:37 ` Leon Romanovsky
2024-10-31 17:43 ` Jens Axboe
2024-10-31 20:43 ` Leon Romanovsky
2024-10-31 17:42 ` Jens Axboe
2024-10-31 21:17 ` Robin Murphy
2024-11-04 9:58 ` Christoph Hellwig
2024-11-04 11:39 ` Leon Romanovsky
2024-11-05 19:53 ` Jason Gunthorpe
2024-11-07 8:32 ` Christoph Hellwig
2024-11-07 13:28 ` Jason Gunthorpe
2024-11-07 13:50 ` Christoph Hellwig
2024-11-08 15:02 ` Jason Gunthorpe
2024-11-08 15:05 ` Christoph Hellwig
2024-11-08 15:25 ` Jason Gunthorpe
2024-11-08 15:29 ` Christoph Hellwig
2024-11-08 15:38 ` Jason Gunthorpe
2024-11-12 6:01 ` Christoph Hellwig
2024-11-13 18:41 ` Jason Gunthorpe
2024-11-05 18:51 ` Jason Gunthorpe
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