linux-kernel - Re: [RFC] Make use of non-dynamic dmabuf in RDMA

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: <20210825154908.GH1721383@nvidia.com>
Date:   Wed, 25 Aug 2021 12:49:08 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Christian König <christian.koenig@....com>
Cc:     John Hubbard <jhubbard@...dia.com>,
        Gal Pressman <galpress@...zon.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Doug Ledford <dledford@...hat.com>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-rdma <linux-rdma@...r.kernel.org>,
        Oded Gabbay <ogabbay@...ana.ai>,
        Tomer Tayar <ttayar@...ana.ai>,
        Yossi Leybovich <sleybo@...zon.com>,
        Alexander Matushevsky <matua@...zon.com>,
        Leon Romanovsky <leonro@...dia.com>,
        Jianxin Xiong <jianxin.xiong@...el.com>
Subject: Re: [RFC] Make use of non-dynamic dmabuf in RDMA

On Wed, Aug 25, 2021 at 05:14:06PM +0200, Christian König wrote:

> Yeah, that's exactly what I'm talking about by adding cgroup or similar. You
> need a knob to control this.

We have the pinned memory ulimit today.

A pinned memory cgroup might be interesting, but even containrs are
covered under the ulimit (IIRC), so the driver to do this work might
not be so strong.

Jason