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From: Christoph Lameter <cl@linux.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Jerome Glisse <j.glisse@gmail.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	jglisse@redhat.com, mgorman@suse.de, aarcange@redhat.com,
	riel@redhat.com, airlied@redhat.com,
	aneesh.kumar@linux.vnet.ibm.com,
	Cameron Buschardt <cabuschardt@nvidia.com>,
	Mark Hairgrove <mhairgrove@nvidia.com>,
	Geoffrey Gerfin <ggerfin@nvidia.com>,
	John McKenna <jmckenna@nvidia.com>,
	akpm@linux-foundation.org
Subject: Re: Interacting with coherent memory on external devices
Date: Fri, 24 Apr 2015 10:49:28 -0500 (CDT)	[thread overview]
Message-ID: <alpine.DEB.2.11.1504241048490.9889@gentwo.org> (raw)
In-Reply-To: <20150424145459.GY5561@linux.vnet.ibm.com>

On Fri, 24 Apr 2015, Paul E. McKenney wrote:

> can deliver, but where the cost of full-fledge hand tuning cannot be
> justified.
>
> You seem to believe that this latter category is the empty set, which
> I must confess does greatly surprise me.

If there are already compromises are being made then why would you want to
modify the kernel for this? Some user space coding and device drivers
should be sufficient.

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  reply	other threads:[~2015-04-24 15:49 UTC|newest]

Thread overview: 97+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-21 21:44 Paul E. McKenney
2015-04-21 23:46 ` Jerome Glisse
2015-04-22  0:36   ` Benjamin Herrenschmidt
2015-04-22 12:42   ` Paul E. McKenney
2015-04-21 23:49 ` Christoph Lameter
2015-04-22  0:05   ` Jerome Glisse
2015-04-22  0:50     ` Christoph Lameter
2015-04-22  1:01       ` Benjamin Herrenschmidt
2015-04-22 13:35         ` Paul E. McKenney
2015-04-22 13:18       ` Paul E. McKenney
2015-04-22 16:16         ` Christoph Lameter
2015-04-22 17:07           ` Jerome Glisse
2015-04-22 18:17             ` Christoph Lameter
2015-04-22 18:52               ` Paul E. McKenney
2015-04-23 14:12                 ` Christoph Lameter
2015-04-23 19:24                   ` Paul E. McKenney
2015-04-24 14:01                     ` Christoph Lameter
2015-04-24 14:13                       ` Paul E. McKenney
2015-04-24 15:53                       ` Rik van Riel
2015-04-23  2:36               ` Benjamin Herrenschmidt
2015-04-23 14:10                 ` Christoph Lameter
2015-04-23 15:42                   ` Jerome Glisse
2015-04-24 14:04                     ` Christoph Lameter
2015-04-23 22:29                   ` Benjamin Herrenschmidt
2015-04-23  2:30           ` Benjamin Herrenschmidt
2015-04-23 14:25             ` Christoph Lameter
2015-04-23 15:25               ` Austin S Hemmelgarn
2015-04-23 19:33                 ` Paul E. McKenney
2015-04-24 14:12                   ` Christoph Lameter
2015-04-24 14:57                     ` Paul E. McKenney
2015-04-24 15:09                       ` Jerome Glisse
2015-04-25 11:20                         ` Paul E. McKenney
2015-04-24 15:52                       ` Christoph Lameter
2015-04-23 22:37                 ` Benjamin Herrenschmidt
2015-04-24 14:09                 ` Christoph Lameter
2015-04-23 16:04       ` Rik van Riel
2015-04-22  0:42   ` Benjamin Herrenschmidt
2015-04-22  0:57     ` Paul E. McKenney
2015-04-22  1:04       ` Benjamin Herrenschmidt
2015-04-22 15:25         ` Christoph Lameter
2015-04-22 16:31           ` Jerome Glisse
2015-04-22 17:14             ` Christoph Lameter
2015-04-22 19:07               ` Jerome Glisse
2015-04-23  2:34               ` Benjamin Herrenschmidt
2015-04-23 14:38                 ` Christoph Lameter
2015-04-23 16:11                   ` Jerome Glisse
2015-04-24 14:29                     ` Christoph Lameter
2015-04-24 15:08                       ` Jerome Glisse
2015-04-24 16:03                         ` Christoph Lameter
2015-04-24 16:43                           ` Jerome Glisse
2015-04-24 16:58                             ` Christoph Lameter
2015-04-24 17:19                               ` Jerome Glisse
2015-04-24 18:56                                 ` Christoph Lameter
2015-04-24 19:29                                   ` Jerome Glisse
2015-04-24 20:00                                     ` Christoph Lameter
2015-04-24 20:32                                       ` Jerome Glisse
2015-04-25 11:46                                       ` Paul E. McKenney
2015-04-27 15:08                                         ` Christoph Lameter
2015-04-27 15:47                                           ` Jerome Glisse
2015-04-27 16:17                                             ` Christoph Lameter
2015-04-27 16:29                                               ` Rik van Riel
2015-04-27 16:48                                                 ` Christoph Lameter
2015-04-27 23:54                                                   ` Benjamin Herrenschmidt
2015-05-13 14:10                                                     ` Vlastimil Babka
2015-05-13 23:38                                                       ` Benjamin Herrenschmidt
2015-05-14  7:39                                                         ` Vlastimil Babka
2015-05-14  7:51                                                           ` Benjamin Herrenschmidt
2015-05-28 18:18                                                             ` Paul E. McKenney
2015-04-27 16:43                                               ` Jerome Glisse
2015-04-27 16:51                                                 ` Christoph Lameter
2015-04-27 17:21                                                   ` Jerome Glisse
2015-04-27 19:26                                                     ` Christoph Lameter
2015-04-27 19:35                                                       ` Rik van Riel
2015-04-27 20:52                                                       ` Jerome Glisse
2015-04-28 14:18                                                         ` Christoph Lameter
2015-04-28 17:20                                                           ` Jerome Glisse
2015-04-27 16:15                                           ` Paul E. McKenney
2015-04-27 16:31                                             ` Christoph Lameter
2015-04-24 23:45                               ` Benjamin Herrenschmidt
2015-04-23 18:52                   ` Paul E. McKenney
2015-04-24 14:30                     ` Christoph Lameter
2015-04-24 14:54                       ` Paul E. McKenney
2015-04-24 15:49                         ` Christoph Lameter [this message]
2015-04-24 16:06                           ` Rik van Riel
2015-04-25 11:49                           ` Paul E. McKenney
2015-04-24 16:00                       ` Jerome Glisse
2015-04-24 16:08                       ` Rik van Riel
2015-04-23 17:28               ` Rik van Riel
2015-04-23  2:27           ` Benjamin Herrenschmidt
2015-04-23 14:20             ` Christoph Lameter
2015-04-23 16:22               ` Jerome Glisse
2015-04-24 18:41                 ` Oded Gabbay
2015-04-23 19:00               ` Paul E. McKenney
2015-04-22 15:20       ` Christoph Lameter
2015-04-25  2:32 ` Rik van Riel
2015-04-25  3:32   ` Benjamin Herrenschmidt
2015-04-25 11:55     ` Paul E. McKenney

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