Re: [PATCHv2] rdma: add a new IB_ACCESS_GIFT flag

Michael R. Hines
2013-04-05T20:54:46Z

To be more specific, here's what I did:

1. apply kernel module patch - re-insert module
1. QEMU does: ibv_reg_mr(........IBV_ACCESS_GIFT | IBV_ACCESS_REMOTE_READ)
2. Start the RDMA migration
3. Migration completes without any errors

This test does *not* work with a cgroup swap limit, however. The process
gets killed. (Both with and without GIFT)

- Michael

On 04/05/2013 04:43 PM, Roland Dreier wrote:
> On Fri, Apr 5, 2013 at 1:17 PM, Michael R. Hines
> <mrhines@linux.vnet.ibm.com> wrote:
>> 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).
> Not sure I'm interpreting this correctly. Are you saying that things
> worked without actually setting the GIFT flag? In which case why are
> we adding this flag?
>
> - R.
>