[libvirt] question about rdma migration

[Roy Shterman]

Hi Jirka,

Thanks for your answer, but I'm looking for a way to set RLIMIT_MEMLOCK
without locking all VM memory.
I'm wondering if there is a way to set RLIMIT_MEMLOCK without using the
methods you wrote above.

Regards,
Roy

On Tue, Mar 15, 2016 at 8:02 PM, Jiri Denemark <jdenemar at redhat.com> wrote:

> On Fri, Feb 19, 2016 at 23:37:57 +0200, Roy Shterman wrote:
> > Yes,
> >
> > I tried also running it as root user and it also didn't worked.
> >
> > Do you know where libvirt (or QEMU) gets the value for process MEMLOCK?
> > maybe i can change this value in libvirt code?
>
> You can change it by specifying /domain/memtune/hard_limit in domain
> XML; see http://libvirt.org/formatdomain.html#elementsMemoryTuning
>
> Libvirt will use the hard_limit value for RLIMIT_MEMLOCK, but only if
> needed. So it will be set only if any of the following is true:
>     - you are on PPC64
>     - the /domain/memoryBacking/locked is set
>     - a VFIO device passthrough is used
>     - an RDMA migration is initiated.
>
> Jirka
>
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