linux-kernel - Re: [PATCH v4 0/2] Add p2p via dmabuf to habanalabs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210706173137.GA7840@lst.de>
Date:   Tue, 6 Jul 2021 19:31:37 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Oded Gabbay <oded.gabbay@...il.com>,
        Oded Gabbay <ogabbay@...nel.org>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Gal Pressman <galpress@...zon.com>, sleybo@...zon.com,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        linux-rdma <linux-rdma@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Doug Ledford <dledford@...hat.com>,
        Dave Airlie <airlied@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Leon Romanovsky <leonro@...dia.com>,
        Christoph Hellwig <hch@....de>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>
Subject: Re: [PATCH v4 0/2] Add p2p via dmabuf to habanalabs

On Tue, Jul 06, 2021 at 02:28:28PM -0300, Jason Gunthorpe wrote:
> > Also on your claim that drivers/gpu is a non-upstream disaster: I've
> > also learned that that for drivers/rdma there's the upstream driver,
> > and then there's the out-of-tree hackjob the vendor actually
> > supports.
> 
> In the enterprise world everyone has their out of tree backport
> drivers. It varies on the vendor how much deviation there is from the
> upstream driver and what commercial support relationship the vendor
> has with the enterprise distros.

I think he means the Mellanox OFED stack, which is a complete and utter
mess and which gets force fed by Mellanox/Nvidia on unsuspecting
customers.  I know many big HPC sites that ignore it, but a lot of
enterprise customers are dumb enought to deploy it.