Re: [Qemu-devel] [PATCH v7 01/42] Start documenting how postcopy works.

[Dr. David Alan Gilbert]

* Juan Quintela (address@hidden) wrote:
> "Dr. David Alan Gilbert (git)" <address@hidden> wrote:
> > From: "Dr. David Alan Gilbert" <address@hidden>
> >
> > Signed-off-by: Dr. David Alan Gilbert <address@hidden>
> > ---
> >  docs/migration.txt | 167 
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 167 insertions(+)
> >
> > diff --git a/docs/migration.txt b/docs/migration.txt
> > index f6df4be..b4b93d1 100644
> > --- a/docs/migration.txt
> > +++ b/docs/migration.txt
> > @@ -291,3 +291,170 @@ save/send this state when we are in the middle
> > of a pio operation
> >  (that is what ide_drive_pio_state_needed() checks).  If DRQ_STAT is
> >  not enabled, the values on that fields are garbage and don't need to
> >  be sent.
> > +
> > += Return path =
> > +
> > +In most migration scenarios there is only a single data path that runs
> > +from the source VM to the destination, typically along a single fd 
> > (although
> > +possibly with another fd or similar for some fast way of throwing pages 
> > across).
> > +
> > +However, some uses need two way communication; in particular the
> > Postcopy destination
> 
> This line is a bit long O:-)
> 
> In general, we are too near to the 80 columns limit.

Thanks, Fixed (interesting, the check-patch doesn't
seem to moan about text files).

Dave
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK