From: Doug Ledford <dledford@redhat.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christopher Lameter <cl@linux.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Jan Kara <jack@suse.cz>,
Ira Weiny <ira.weiny@intel.com>,
lsf-pc@lists.linux-foundation.org, linux-rdma@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
John Hubbard <jhubbard@nvidia.com>,
Jerome Glisse <jglisse@redhat.com>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>,
Michal Hocko <mhocko@kernel.org>
Subject: Re: [LSF/MM TOPIC] Discuss least bad options for resolving longterm-GUP usage by RDMA
Date: Wed, 06 Feb 2019 15:50:39 -0500 [thread overview]
Message-ID: <f84dfa9d5e34ce76b5f599086f5fbaa12f7903bf.camel@redhat.com> (raw)
In-Reply-To: <20190206204954.GS21860@bombadil.infradead.org>
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On Wed, 2019-02-06 at 12:49 -0800, Matthew Wilcox wrote:
> On Wed, Feb 06, 2019 at 03:47:53PM -0500, Doug Ledford wrote:
> > On Wed, 2019-02-06 at 12:41 -0800, Matthew Wilcox wrote:
> > > On Wed, Feb 06, 2019 at 03:28:35PM -0500, Doug Ledford wrote:
> > > > On Wed, 2019-02-06 at 12:20 -0800, Matthew Wilcox wrote:
> > > > > Not hot-unplugging the RDMA device but hot-unplugging an NV-DIMM.
>
> ^^^ I think you missed this line ^^^
Indeed, I did ;-)
>
> > You said "now that I think about it, there was a desire to support hot-
> > unplug which also needed revoke". For us, hot unplug is done at the
> > device level and means all connections must be torn down. So in the
> > context of this argument, if people want revoke so DAX can migrate from
> > one NV-DIMM to another, ok. But revoke does not help RDMA migrate.
> >
> > If, instead, you mean that you want to support hot unplug of an NV-DIMM
> > that is currently the target of RDMA transfers, then I believe
> > Christoph's answer on this is correct. It all boils down to which
> > device you are talking about doing the hot unplug on.
--
Doug Ledford <dledford@redhat.com>
GPG KeyID: B826A3330E572FDD
Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
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next prev parent reply other threads:[~2019-02-06 20:50 UTC|newest]
Thread overview: 155+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-05 17:50 [LSF/MM TOPIC] Discuss least bad options for resolving longterm-GUP usage by RDMA Ira Weiny
2019-02-05 18:01 ` Ira Weiny
2019-02-06 21:31 ` Dave Chinner
2019-02-06 9:50 ` Jan Kara
2019-02-06 17:31 ` Jason Gunthorpe
2019-02-06 17:52 ` Matthew Wilcox
2019-02-06 18:32 ` Doug Ledford
2019-02-06 18:32 ` Doug Ledford
2019-02-06 18:35 ` Matthew Wilcox
2019-02-06 18:44 ` Doug Ledford
2019-02-06 18:44 ` Doug Ledford
2019-02-06 18:52 ` Jason Gunthorpe
2019-02-06 19:45 ` Dan Williams
2019-02-06 19:45 ` Dan Williams
2019-02-06 20:14 ` Doug Ledford
2019-02-06 21:04 ` Dan Williams
2019-02-06 21:04 ` Dan Williams
2019-02-06 21:12 ` Doug Ledford
2019-02-06 21:12 ` Doug Ledford
2019-02-06 19:16 ` Christopher Lameter
2019-02-06 19:16 ` Christopher Lameter
2019-02-06 19:40 ` Matthew Wilcox
2019-02-06 20:16 ` Doug Ledford
2019-02-06 20:16 ` Doug Ledford
2019-02-06 20:20 ` Matthew Wilcox
2019-02-06 20:28 ` Doug Ledford
2019-02-06 20:28 ` Doug Ledford
2019-02-06 20:41 ` Matthew Wilcox
2019-02-06 20:47 ` Doug Ledford
2019-02-06 20:47 ` Doug Ledford
2019-02-06 20:49 ` Matthew Wilcox
2019-02-06 20:50 ` Doug Ledford [this message]
2019-02-06 20:50 ` Doug Ledford
2019-02-06 20:31 ` Jason Gunthorpe
2019-02-06 20:39 ` Christopher Lameter
2019-02-06 20:39 ` Christopher Lameter
2019-02-06 20:54 ` Doug Ledford
2019-02-06 20:54 ` Doug Ledford
2019-02-07 16:48 ` Jan Kara
2019-02-06 20:24 ` Christopher Lameter
2019-02-06 20:24 ` Christopher Lameter
2019-02-06 21:03 ` Dave Chinner
2019-02-06 22:08 ` Jason Gunthorpe
2019-02-06 22:24 ` Doug Ledford
2019-02-06 22:24 ` Doug Ledford
2019-02-06 22:44 ` Dan Williams
2019-02-06 22:44 ` Dan Williams
2019-02-06 23:21 ` Jason Gunthorpe
2019-02-06 23:30 ` Dan Williams
2019-02-06 23:30 ` Dan Williams
2019-02-06 23:41 ` Jason Gunthorpe
2019-02-07 0:22 ` Dan Williams
2019-02-07 0:22 ` Dan Williams
2019-02-07 0:22 ` Dan Williams
2019-02-07 0:22 ` Dan Williams
2019-02-07 5:33 ` Jason Gunthorpe
2019-02-07 1:57 ` Doug Ledford
2019-02-07 1:57 ` Doug Ledford
2019-02-07 2:48 ` Dan Williams
2019-02-07 2:48 ` Dan Williams
2019-02-07 2:48 ` Dan Williams
2019-02-07 2:48 ` Dan Williams
2019-02-07 2:42 ` Doug Ledford
2019-02-07 2:42 ` Doug Ledford
2019-02-07 3:13 ` Dan Williams
2019-02-07 3:13 ` Dan Williams
2019-02-07 17:23 ` Ira Weiny
2019-02-07 16:25 ` Doug Ledford
2019-02-07 16:25 ` Doug Ledford
2019-02-07 16:55 ` Christopher Lameter
2019-02-07 16:55 ` Christopher Lameter
2019-02-07 17:35 ` Ira Weiny
2019-02-07 18:17 ` Christopher Lameter
2019-02-07 18:17 ` Christopher Lameter
2019-02-08 4:43 ` Dave Chinner
2019-02-08 11:10 ` Jan Kara
2019-02-08 20:50 ` Dan Williams
2019-02-08 20:50 ` Dan Williams
2019-02-11 10:24 ` Jan Kara
2019-02-11 17:22 ` Dan Williams
2019-02-11 17:22 ` Dan Williams
2019-02-11 18:06 ` Jason Gunthorpe
2019-02-11 18:15 ` Dan Williams
2019-02-11 18:15 ` Dan Williams
2019-02-11 18:19 ` Ira Weiny
2019-02-11 18:26 ` Jason Gunthorpe
2019-02-11 18:40 ` Matthew Wilcox
2019-02-11 19:58 ` Dan Williams
2019-02-11 19:58 ` Dan Williams
2019-02-11 20:49 ` Jason Gunthorpe
2019-02-11 21:02 ` Dan Williams
2019-02-11 21:02 ` Dan Williams
2019-02-11 21:09 ` Jason Gunthorpe
2019-02-12 16:34 ` Jan Kara
2019-02-12 16:55 ` Christopher Lameter
2019-02-12 16:55 ` Christopher Lameter
2019-02-13 15:06 ` Jan Kara
2019-02-12 16:36 ` Christopher Lameter
2019-02-12 16:36 ` Christopher Lameter
2019-02-12 16:44 ` Jan Kara
2019-02-11 21:08 ` Jerome Glisse
2019-02-11 21:22 ` John Hubbard
2019-02-11 21:22 ` John Hubbard
2019-02-11 22:12 ` Jason Gunthorpe
2019-02-11 22:33 ` John Hubbard
2019-02-11 22:33 ` John Hubbard
2019-02-12 16:39 ` Christopher Lameter
2019-02-12 16:39 ` Christopher Lameter
2019-02-13 2:58 ` John Hubbard
2019-02-13 2:58 ` John Hubbard
2019-02-12 16:28 ` Jan Kara
2019-02-14 20:26 ` Jerome Glisse
2019-02-14 20:50 ` Matthew Wilcox
2019-02-14 21:39 ` Jerome Glisse
2019-02-15 1:19 ` Dave Chinner
2019-02-15 15:42 ` Christopher Lameter
2019-02-15 15:42 ` Christopher Lameter
2019-02-15 18:08 ` Matthew Wilcox
2019-02-15 18:31 ` Christopher Lameter
2019-02-15 18:31 ` Christopher Lameter
2019-02-15 22:00 ` Jason Gunthorpe
2019-02-15 23:38 ` Ira Weiny
2019-02-16 22:42 ` Dave Chinner
2019-02-17 2:54 ` Christopher Lameter
2019-02-17 2:54 ` Christopher Lameter
2019-02-12 16:07 ` Jan Kara
2019-02-12 21:53 ` Dan Williams
2019-02-12 21:53 ` Dan Williams
2019-02-08 21:20 ` Dave Chinner
2019-02-08 15:33 ` Christopher Lameter
2019-02-08 15:33 ` Christopher Lameter
2019-02-07 17:24 ` Matthew Wilcox
2019-02-07 17:26 ` Jason Gunthorpe
2019-02-07 3:52 ` Dave Chinner
2019-02-07 5:23 ` Jason Gunthorpe
2019-02-07 6:00 ` Dan Williams
2019-02-07 6:00 ` Dan Williams
2019-02-07 17:17 ` Jason Gunthorpe
2019-02-07 23:54 ` Dan Williams
2019-02-07 23:54 ` Dan Williams
2019-02-08 1:44 ` Ira Weiny
2019-02-08 5:19 ` Jason Gunthorpe
2019-02-08 7:20 ` Dan Williams
2019-02-08 7:20 ` Dan Williams
2019-02-08 15:42 ` Jason Gunthorpe
2019-02-07 15:04 ` Chuck Lever
2019-02-07 15:28 ` Tom Talpey
2019-02-07 15:37 ` Doug Ledford
2019-02-07 15:37 ` Doug Ledford
2019-02-07 15:41 ` Tom Talpey
2019-02-07 15:56 ` Doug Ledford
2019-02-07 15:56 ` Doug Ledford
2019-02-07 16:57 ` Ira Weiny
2019-02-07 21:31 ` Tom Talpey
2019-02-07 16:54 ` Ira Weiny
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