linux-kernel - Re: Linux RDMA mini-conf at Plumbers 2018

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Date:   Thu, 20 Sep 2018 21:54:28 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Jason Gunthorpe <jgg@...lanox.com>
Cc:     linux-rdma@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Alex Rosenbaum <alexr@...lanox.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Christian König <christian.koenig@....com>,
        Christoph Hellwig <hch@....de>,
        Christopher Lameter <cl@...ux.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Don Dutile <ddutile@...hat.com>,
        Doug Ledford <dledford@...hat.com>, Jan Kara <jack@...e.cz>,
        John Hubbard <jhubbard@...dia.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Matthew Wilcox <willy@...radead.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Noa Osherovich <noaos@...lanox.com>,
        Parav Pandit <parav@...lanox.com>,
        Stephen Bates <sbates@...thlin.com>
Subject: Re: Linux RDMA mini-conf at Plumbers 2018

On Thu, Sep 20, 2018 at 12:19:23PM -0600, Jason Gunthorpe wrote:
> This is just a friendly reminder that registration deadlines are
> approaching for this conference. Please see
>
> https://www.linuxplumbersconf.org/event/2/page/7-attend
>
> For details.
>
> This year we expect to have close to a day set aside for RDMA related
> topics. Including up to half a day for the thorny general kernel issues
> related to get_user_pages(), particularly as exasperated by RDMA.
>
> We have been working on the following concepts for sessions, I've
> roughly marked names based on past participation in related email
> threads. As we get closer to the conference date we will be organizing
> leaders for each section based on these lists, please let us know of
> any changes, or desire to be a leader!
>
> RDMA and get_user_pages
> =======================
>   Dan Williams <dan.j.williams@...el.com>
>   Matthew Wilcox <willy@...radead.org>
>   John Hubbard <jhubbard@...dia.com>
>   Nicholas Piggin <npiggin@...il.com>
>   Jan Kara <jack@...e.cz>
>
>  RDMA, DAX and persistant memory co-existence.
>
>  Explore the limits of what is possible without using On
>  Demand Paging Memory Registration. Discuss 'shootdown'
>  of userspace MRs
>
>  Dirtying pages obtained with get_user_pages() can oops ext4
>  discuss open solutions.
>
> RDMA and PCI peer to peer
> =========================
>   Don Dutile <ddutile@...hat.com>
>   Alex Williamson <alex.williamson@...hat.com>
>   Christoph Hellwig <hch@....de>
>   Stephen Bates <sbates@...thlin.com>
>   Logan Gunthorpe <logang@...tatee.com>
>   Jérôme Glisse <jglisse@...hat.com>
>   Christian König <christian.koenig@....com>
>   Bjorn Helgaas <bhelgaas@...gle.com>
>
>  RDMA and PCI peer to peer transactions. IOMMU issues. Integration
>  with HMM. How to expose PCI BAR memory to userspace and other
>  drivers as a DMA target.
>
> Improving testing of RDMA with syzkaller, RXE and Python
> ========================================================
>  Noa Osherovich <noaos@...lanox.com>
>  Don Dutile <ddutile@...hat.com>
>  Jason Gunthorpe <jgg@...lanox.com>
>
>  Problem solve RDMA's distinct lack of public tests.
>  Provide a better framework for all drivers to test with,
>  and a framework for basic testing in userspace.
>
>  Worst remaining unfixed syzkaller bugs and how to try to fix them
>
>  How to hook syzkaller more deeply into RDMA.
>
> IOCTL conversion and new kABI topics
> ====================================
>  Jason Gunthorpe <jgg@...lanox.com>
>  Alex Rosenbaum <alexr@...lanox.com>
>
>  Attempt to close on the remaining tasks to complete the project
>
>  Restore fork() support to userspace
>
> Container and namespaces for RDMA topics
> ========================================
>  Parav Pandit <parav@...lanox.com>
>  Doug Ledford <dledford@...hat.com>
>
>  Remaining sticky situations with containers
>
>  namespaces in sysfs and legacy all-namespace operation
>
>  Remaining CM issues
>
>  Security isolation problems
>
> Very large Contiguous regions in userspace
> ==========================================
>  Christopher Lameter <cl@...ux.com>
>  Parav Pandit <parav@...lanox.com>
>
>  Poor performance of get_user_pages on very large virtual ranges
>
>  No standardized API to allocate regions to user space
>
>  Carry over from last year
>
> As we get closer to the conference date the exact schedule will be
> published on the conference web site. I belive we have the Thursday
> set aside right now.
>
> If there are any last minute topics people would like to see please
> let us know.

I want to remind you that Mike wanted to bring the topic of enhancing
remote page faults during post-copy container migration in CRIU over
RDMA.

Thanks

>
> See you all in Vancouver!
>
> Thanks,
> Jason & Leon
>

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