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Date: Tue, 8 Sep 2015 15:30:30 +0530
From: Bharata B Rao <bharata@linux.vnet.ibm.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
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Subject: Re: [Qemu-devel] [PATCH 19/23] userfaultfd: activate syscall
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On Tue, Sep 08, 2015 at 09:59:47AM +0100, Dr. David Alan Gilbert wrote:
> * Bharata B Rao (bharata@linux.vnet.ibm.com) wrote:
> > In fact I had successfully done postcopy migration of sPAPR guest with
> > this setup.
> 
> Interesting - I'd not got that far myself on power; I was hitting a problem
> loading htab ( htab_load() bad index 2113929216 (14848+0 entries) in htab stream (htab_shift=25) )
> 
> Did you have to make any changes to the qemu code to get that happy?

I should have mentioned that I tried only QEMU driven migration within
the same host using wp3-postcopy branch of your tree. I don't see the
above issue.

(qemu) info migrate
capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: off compress: off x-postcopy-ram: on 
Migration status: completed
total time: 39432 milliseconds
downtime: 162 milliseconds
setup: 14 milliseconds
transferred ram: 1297209 kbytes
throughput: 270.72 mbps
remaining ram: 0 kbytes
total ram: 4194560 kbytes
duplicate: 734015 pages
skipped: 0 pages
normal: 318469 pages
normal bytes: 1273876 kbytes
dirty sync count: 4

I will try migration between different hosts soon and check.

Regards,
Bharata.