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Date:   Thu, 20 Sep 2018 21:54:28 +0300
From:   Leon Romanovsky <leon@kernel.org>
To:     Jason Gunthorpe <jgg@mellanox.com>
Cc:     linux-rdma@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Alex Rosenbaum <alexr@mellanox.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>,
        Christoph Hellwig <hch@lst.de>,
        Christopher Lameter <cl@linux.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Don Dutile <ddutile@redhat.com>,
        Doug Ledford <dledford@redhat.com>, Jan Kara <jack@suse.cz>,
        John Hubbard <jhubbard@nvidia.com>,
        =?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Matthew Wilcox <willy@infradead.org>,
        Nicholas Piggin <npiggin@gmail.com>,
        Noa Osherovich <noaos@mellanox.com>,
        Parav Pandit <parav@mellanox.com>,
        Stephen Bates <sbates@raithlin.com>
Subject: Re: Linux RDMA mini-conf at Plumbers 2018
Message-ID: <20180920185428.GT3519@mtr-leonro.mtl.com>
References: <20180920181923.GA6542@mellanox.com>
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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
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>   Dan Williams <dan.j.williams@intel.com>
>   Matthew Wilcox <willy@infradead.org>
>   John Hubbard <jhubbard@nvidia.com>
>   Nicholas Piggin <npiggin@gmail.com>
>   Jan Kara <jack@suse.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
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D
>   Don Dutile <ddutile@redhat.com>
>   Alex Williamson <alex.williamson@redhat.com>
>   Christoph Hellwig <hch@lst.de>
>   Stephen Bates <sbates@raithlin.com>
>   Logan Gunthorpe <logang@deltatee.com>
>   J=E9r=F4me Glisse <jglisse@redhat.com>
>   Christian K=F6nig <christian.koenig@amd.com>
>   Bjorn Helgaas <bhelgaas@google.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
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D
>  Noa Osherovich <noaos@mellanox.com>
>  Don Dutile <ddutile@redhat.com>
>  Jason Gunthorpe <jgg@mellanox.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
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>  Jason Gunthorpe <jgg@mellanox.com>
>  Alex Rosenbaum <alexr@mellanox.com>
>
>  Attempt to close on the remaining tasks to complete the project
>
>  Restore fork() support to userspace
>
> Container and namespaces for RDMA topics
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>  Parav Pandit <parav@mellanox.com>
>  Doug Ledford <dledford@redhat.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
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>  Christopher Lameter <cl@linux.com>
>  Parav Pandit <parav@mellanox.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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