linux-kernel - Re: [PATCHv2] rdma: add a new IB_ACCESS

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Message-ID: <5165934B.6050802@linux.vnet.ibm.com>
Date:	Wed, 10 Apr 2013 12:28:59 -0400
From:	"Michael R. Hines" <mrhines@...ux.vnet.ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Roland Dreier <roland@...nel.org>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Yishai Hadas <yishaih@...lanox.com>,
	Christoph Lameter <cl@...ux.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, qemu-devel@...gnu.org
Subject: Re: [PATCHv2] rdma: add a new IB_ACCESS_GIFT flag

On 04/10/2013 11:05 AM, Michael S. Tsirkin wrote:
> On Wed, Apr 10, 2013 at 11:48:24AM -0400, Michael R. Hines wrote:
>> There's a very nice, simple client/server RDMA application on the
>> internet you can use to test your patch.
>>
>> http://thegeekinthecorner.wordpress.com/2010/09/28/
>> rdma-read-and-write-with-ib-verbs/
>>
>> This guy provides the source code which dumps several gigabytes over RDMA
>> to the other side.
>>
>> There's no need to run QEMU to test your patch,
>> assuming you have access to infiniband hardware.
>>
>> - Michael
>
> Does this app have any COW pages?

It can easily be made to be. It's just a couple of C source files.

I've only used it for basic testing.

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