Re: migration with exec giving truncated images

[Jim Paris <jim-XrPbb/hENzg@public.gmane.org>]

Uri Lublin wrote:
> There is still the mystery of different file sizes for different 
> migration-exec commands, all files are "valid saved image".
> It seems to me that some unmodified pages are being marked as dirty, and 
> are being saved twice (and later loaded twice).
> I'm still chasing that.

Hi Uri,

I looked into this a bit more and it seems that a big piece of
migration.c is missing or broken.

In migrate_write_buffer, it calls migrate_check_convergence, which
returns TRUE if the migration is "almost" complete (dirty pages < 50,
or too many iterations through memory).  At that point, it then calls
migrate_finish -- which finishes writing the current page, but never
actually writes the remaining 50 pages (!)  Am I missing something?

-jim



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