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

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Date:	Tue, 9 Apr 2013 23:37:00 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	"Michael R. Hines" <mrhines@...ux.vnet.ibm.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 Tue, Apr 09, 2013 at 11:34:09PM +0300, Michael S. Tsirkin wrote:
> On Fri, Apr 05, 2013 at 04:17:36PM -0400, Michael R. Hines wrote:
> > The userland part of the patch was missing (IBV_ACCESS_GIFT).
> > 
> > I added flag that to /usr/include in addition to this patch and did
> > a test RDMA migrate and it seems to work without any problems.
> > 
> > I also removed the IBV_*_WRITE flags on the sender-side and
> > activated cgroups with the "memory.memsw.limit_in_bytes" activated
> > and the migration with RDMA also succeeded without any problems
> > (both with *and* without GIFT also worked).
> > 
> > Any additional tests you would like?
> > 
> > 
> > - Michael
> 
> RDMA can't really work with swap so not sure how that's relevant.
> 
> Please check memory.usage_in_bytes - is it lower with
> the GIFT flag?  I think this is what we really care about.

oh and no reason to set memsw.limit_in_bytes I think.

> -- 
> MST
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