Re: [kvm-devel] [ofa-general] Re: Demand paging for memory regions

2008-02-14 Thread Steve Wise
Robin Holt wrote: > On Thu, Feb 14, 2008 at 09:09:08AM -0600, Steve Wise wrote: >> Note that for T3, this involves suspending _all_ rdma connections that are >> in the same PD as the MR being remapped. This is because the driver >> doesn't know who the application a

Re: [kvm-devel] [ofa-general] Re: Demand paging for memory regions

2008-02-14 Thread Steve Wise
Felix Marti wrote: > > That is correct, not a change we can make for T3. We could, in theory, > deal with changing mappings though. The change would need to be > synchronized though: the VM would need to tell us which mapping were > about to change and the driver would then need to disable DMA to

Re: [kvm-devel] [ofa-general] Re: Demand paging for memory regions

2008-02-12 Thread Steve Wise
Jason Gunthorpe wrote: > On Tue, Feb 12, 2008 at 05:01:17PM -0800, Christoph Lameter wrote: >> On Tue, 12 Feb 2008, Jason Gunthorpe wrote: >> >>> Well, certainly today the memfree IB devices store the page tables in >>> host memory so they are already designed to hang onto packets during >>> the pa

Re: [kvm-devel] Demand paging for memory regions (was Re: MMU Notifiers V6)

2008-02-12 Thread Steve Wise
Roland Dreier wrote: > [Adding [EMAIL PROTECTED] to get the IB/RDMA people involved] > > This thread has patches that add support for notifying drivers when a > process's memory map changes. The hope is that this is useful for > letting RDMA devices handle registered memory without pinning the >