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Date: Wed, 29 Nov 2017 11:36:13 -0700
From: Jason Gunthorpe <jgg@ziepe.ca>
To: Dan Williams <dan.j.williams@intel.com>
Cc: akpm@linux-foundation.org, linux-nvdimm@lists.01.org,
        linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
        Jeff Moyer <jmoyer@redhat.com>, stable@vger.kernel.org, hch@lst.de,
        linux-mm@kvack.org, Doug Ledford <dledford@redhat.com>,
        Ross Zwisler <ross.zwisler@linux.intel.com>,
        Sean Hefty <sean.hefty@intel.com>,
        Hal Rosenstock <hal.rosenstock@gmail.com>
Subject: Re: [PATCH v3 4/4] IB/core: disable memory registration of
 fileystem-dax vmas
Message-ID: <20171129183613.GD4011@ziepe.ca>
References: <151197872943.26211.6551382719053304996.stgit@dwillia2-desk3.amr.corp.intel.com>
 <151197875158.26211.7203330105253426435.stgit@dwillia2-desk3.amr.corp.intel.com>
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On Wed, Nov 29, 2017 at 10:05:51AM -0800, Dan Williams wrote:
> Until there is a solution to the dma-to-dax vs truncate problem it is
> not safe to allow RDMA to create long standing memory registrations
> against filesytem-dax vmas.
> 
> Cc: Sean Hefty <sean.hefty@intel.com>
> Cc: Doug Ledford <dledford@redhat.com>
> Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
> Cc: Jeff Moyer <jmoyer@redhat.com>
> Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
> Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
> Cc: <linux-rdma@vger.kernel.org>
> Cc: <stable@vger.kernel.org>
> Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings")
> Reported-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
>  drivers/infiniband/core/umem.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

No problem here with drivers/rdma. This will go through another tree
with the rest of the series? In which case here is a co-maintainer ack
for this patch:

Acked-by: Jason Gunthorpe <jgg@mellanox.com>

Dan, can you please update my address to jgg@ziepe.ca, thanks :)

Jason