Re: [Qemu-devel] [PATCH 2/9] migration: Add announce parameters

[Dr. David Alan Gilbert]

* Markus Armbruster (address@hidden) wrote:
> "Dr. David Alan Gilbert (git)" <address@hidden> writes:
> 
> > From: "Dr. David Alan Gilbert" <address@hidden>
> >
> > Add migration parameters that control RARP/GARP announcement timeouts.
> >
> > Based on earlier patches by myself and
> >   Vladislav Yasevich <address@hidden>
> >
> > Signed-off-by: Dr. David Alan Gilbert <address@hidden>
> > ---
> [...]
> > diff --git a/qapi/migration.json b/qapi/migration.json
> > index 7a795ecc16..868071d3a0 100644
> > --- a/qapi/migration.json
> > +++ b/qapi/migration.json
> > @@ -6,6 +6,7 @@
> >  ##
> >  
> >  { 'include': 'common.json' }
> > +{ 'include': 'net.json' }
> >  
> >  ##
> >  # @MigrationStats:
> 
> This hunk looks superfluous.

Gone.

> > @@ -480,6 +481,18 @@
> >  #
> >  # Migration parameters enumeration
> >  #
> > +# @announce-initial: Inital delay (in ms) before sending the first announce
> > +#          (Since 4.0)
> 
> Current master has one instance of ms in qapi/, 9 of milliseconds.  I'd
> stick to the more common spelling.

OK, changed (with some wrapping changed now the lines are longer, and an
added 'e' in announcment).

> > +#
> > +# @announce-max: Maximum delay (in ms) between packets in the announcment
> > +#          (Since 4.0)
> > +#
> > +# @announce-rounds: Number of self-announce packets sent after migration
> > +#          (Since 4.0)
> > +#
> > +# @announce-step: Increase in delay (in ms) between subsequent packets in
> > +#          the announcement (Since 4.0)
> > +#
> >  # @compress-level: Set the compression level to be used in live migration,
> >  #          the compression level is an integer between 0 and 9, where 0 
> > means
> >  #          no compression, 1 means the best compression speed, and 9 means 
> > best
> > @@ -557,10 +570,13 @@
> >  #
> >  # @max-cpu-throttle: maximum cpu throttle percentage.
> >  #                    Defaults to 99. (Since 3.1)
> > +#
> >  # Since: 2.4
> >  ##
> >  { 'enum': 'MigrationParameter',
> > -  'data': ['compress-level', 'compress-threads', 'decompress-threads',
> > +  'data': ['announce-initial', 'announce-max',
> > +           'announce-rounds', 'announce-step',
> > +           'compress-level', 'compress-threads', 'decompress-threads',
> >             'compress-wait-thread',
> >             'cpu-throttle-initial', 'cpu-throttle-increment',
> >             'tls-creds', 'tls-hostname', 'max-bandwidth',
> > @@ -572,6 +588,18 @@
> >  ##
> >  # @MigrateSetParameters:
> >  #
> > +# @announce-initial: Inital delay (in ms) before sending the first announce
> > +#          (Since 4.0)
> > +#
> > +# @announce-max: Maximum delay (in ms) between packets in the announcment
> > +#          (Since 4.0)
> > +#
> > +# @announce-rounds: Number of self-announce packets sent after migration
> > +#          (Since 4.0)
> > +#
> > +# @announce-step: Increase in delay (in ms) between subsequent packets in
> > +#          the announcement (Since 4.0)
> > +#
> >  # @compress-level: compression level
> >  #
> >  # @compress-threads: compression thread count
> > @@ -653,7 +681,11 @@
> >  # TODO either fuse back into MigrationParameters, or make
> >  # MigrationParameters members mandatory
> >  { 'struct': 'MigrateSetParameters',
> > -  'data': { '*compress-level': 'int',
> > +  'data': { '*announce-initial': 'size',
> > +            '*announce-max': 'size',
> > +            '*announce-rounds': 'size',
> > +            '*announce-step': 'size',
> > +            '*compress-level': 'int',
> >              '*compress-threads': 'int',
> >              '*compress-wait-thread': 'bool',
> >              '*decompress-threads': 'int',
> > @@ -692,6 +724,18 @@
> >  #
> >  # The optional members aren't actually optional.
> >  #
> > +# @announce-initial: Inital delay (in ms) before sending the first announce
> > +#          (Since 4.0)
> > +#
> > +# @announce-max: Maximum delay (in ms) between packets in the announcment
> > +#          (Since 4.0)
> > +#
> > +# @announce-rounds: Number of self-announce packets sent after migration
> > +#          (Since 4.0)
> > +#
> > +# @announce-step: Increase in delay (in ms) between subsequent packets in
> > +#          the announcement (Since 4.0)
> > +#
> >  # @compress-level: compression level
> >  #
> >  # @compress-threads: compression thread count
> > @@ -769,7 +813,11 @@
> >  # Since: 2.4
> >  ##
> >  { 'struct': 'MigrationParameters',
> > -  'data': { '*compress-level': 'uint8',
> > +  'data': { '*announce-initial': 'size',
> > +            '*announce-max': 'size',
> > +            '*announce-rounds': 'size',
> > +            '*announce-step': 'size',
> > +            '*compress-level': 'uint8',
> >              '*compress-threads': 'uint8',
> >              '*compress-wait-thread': 'bool',
> >              '*decompress-threads': 'uint8',
> > @@ -785,7 +833,7 @@
> >              '*x-multifd-page-count': 'uint32',
> >              '*xbzrle-cache-size': 'size',
> >         '*max-postcopy-bandwidth': 'size',
> > -            '*max-cpu-throttle':'uint8'} }
> > +            '*max-cpu-throttle':'uint8' } }
> >  
> >  ##
> >  # @query-migrate-parameters:
> 
> Since you're tidying up whitespace, consider expanding the tab.

I'd removed that cleanup based on another review.

> With the superfluous hunk dropped, QAPI part
> Acked-by: Markus Armbruster <address@hidden>

Thanks,

Dave

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