linux-kernel - Re: [PATCH v8 00/24] Provide a new two step DMA mapping API

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Message-ID: <20250420071446.GB10635@unreal>
Date: Sun, 20 Apr 2025 10:14:46 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Jens Axboe <axboe@...nel.dk>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>,
	Christoph Hellwig <hch@....de>, Keith Busch <kbusch@...nel.org>,
	Jake Edge <jake@....net>, Jonathan Corbet <corbet@....net>,
	Jason Gunthorpe <jgg@...pe.ca>, Zhu Yanjun <zyjzyj2000@...il.com>,
	Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>, Sagi Grimberg <sagi@...mberg.me>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Logan Gunthorpe <logang@...tatee.com>,
	Yishai Hadas <yishaih@...dia.com>,
	Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
	Kevin Tian <kevin.tian@...el.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Jérôme Glisse <jglisse@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-block@...r.kernel.org, linux-rdma@...r.kernel.org,
	iommu@...ts.linux.dev, linux-nvme@...ts.infradead.org,
	linux-pci@...r.kernel.org, kvm@...r.kernel.org, linux-mm@...ck.org,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Chuck Lever <chuck.lever@...cle.com>,
	Luis Chamberlain <mcgrof@...nel.org>,
	Matthew Wilcox <willy@...radead.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Kanchan Joshi <joshi.k@...sung.com>,
	Chaitanya Kulkarni <kch@...dia.com>
Subject: Re: [PATCH v8 00/24] Provide a new two step DMA mapping API

On Fri, Apr 18, 2025 at 06:18:00AM -0600, Jens Axboe wrote:
> On 4/18/25 12:47 AM, Leon Romanovsky wrote:
> > Following recent on site LSF/MM 2025 [1] discussion, the overall
> > response was extremely positive with many people expressed their
> > desire to see this series merged, so they can base their work on it.
> > 
> > It includes, but not limited:
> >  * Luis's "nvme-pci: breaking the 512 KiB max IO boundary":
> >    https://lore.kernel.org/all/20250320111328.2841690-1-mcgrof@kernel.org/
> >  * Chuck's NFS conversion to use one structure (bio_vec) for all types
> >    of RPC transports:
> >    https://lore.kernel.org/all/913df4b4-fc4a-409d-9007-088a3e2c8291@oracle.com
> >  * Matthew's vision for the world without struct page:
> >    https://lore.kernel.org/all/20250320111328.2841690-1-mcgrof@kernel.org/
> >  * Confidential computing roadmap from Dan:
> >    https://lore.kernel.org/all/6801a8e3968da_71fe29411@dwillia2-xfh.jf.intel.com.notmuch
> > 
> > This series is combination of effort of many people who contributed ideas,
> > code and testing and I'm gratefully thankful for them.
> 
> Since I previously complained about performance regressions from this
> series, I re-tested the current code. I no longer see a performance
> regression on a AMD EPYC 9754 256 core box, nor on AMD EPYC 7763 128
> core box.
> 
> Tested-by: Jens Axboe <axboe@...nel.dk>

Thanks a lot.

> 
> -- 
> Jens Axboe
>