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Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documen
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport |
Date: |
Tue, 19 Mar 2013 19:23:33 +0200 |
On Tue, Mar 19, 2013 at 06:14:45PM +0100, Paolo Bonzini wrote:
> Il 19/03/2013 18:09, Michael R. Hines ha scritto:
> > Allowing QEMU to swap due to a cgroup limit during migration is a viable
> > overcommit option?
> >
> > I'm trying to keep an open mind, but that would kill the migration
> > time.....
Maybe not if you have a fast SSD, or are using swap in RAM or compressed
swap or ...
> Would it swap? Doesn't the kernel back all zero pages with a single
> copy-on-write page? If that still accounts towards cgroup limits, it
> would be a bug.
>
> Old kernels do not have a shared zero hugepage, and that includes some
> distro kernels. Perhaps that's the problem.
>
> Paolo
AFAIK for zero pages, yes. I'm not sure what the problem is either.
--
MST
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, (continued)
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/18
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/18
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Paolo Bonzini, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Paolo Bonzini, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/19
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael S. Tsirkin, 2013/03/20
- Re: [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport, Michael R. Hines, 2013/03/20