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Re: [Qemu-devel] postcopy migration hangs while loading virtio state
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From: |
Michael S. Tsirkin |
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Subject: |
Re: [Qemu-devel] postcopy migration hangs while loading virtio state |
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Date: |
Mon, 3 Jul 2017 19:25:07 +0300 |
On Fri, Jun 30, 2017 at 05:31:39PM +0100, Dr. David Alan Gilbert wrote:
> * Christian Borntraeger (address@hidden) wrote:
> > On 04/26/2017 01:45 PM, Christian Borntraeger wrote:
> >
> > >> Hmm, I have a theory, if the flags field has bit 1 set, i.e.
> > >> RAM_SAVE_FLAG_COMPRESS
> > >> then try changing ram_handle_compressed to always do the memset.
> > >
> > > FWIW, changing ram_handle_compressed to always memset makes the problem
> > > go away.
> >
> > It is still running fine now with the "always memset change"
>
> Did we ever nail down a fix for this; as I remember Andrea said
> we shouldn't need to do that memset, but we came to the conclusion
> it was something specific to how s390 protection keys worked.
>
> Dave
No we didn't. Let's merge that for now, with a comment that
we don't really understand what's going on?
> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK