Re: [Xen-devel] [Patch v2] tools/migrate: Fix regression when migrating from older version of Xen

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-07-18 at 17:27 +0100, Andrew Cooper wrote:

> > 
> > and you setting ctx->last_checkpoint = 0 basically means that you
> > are
> > banking on the far end (with older version of tools) to close the
> > socket, causing
> > "get pagebuf" to fail and subsequently land on finish.
> > IIRC, this was the behavior before XC_SAVE_ID_LAST_CHECKPOINT was
> > introduced
> > by Ian Campbell, to get rid of this benign error message.
> 
> That might have been 'fine' for PV guests, but it cause active
> breakage for HVM domains where the qemu save record immediately
> follows in the migration stream.

There is a "tail" section on a PV migrate as well, it's not the qemu
save record, but how come this isn't impacted?

Ian.


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