* Markus Armbruster (arm...@redhat.com) wrote: > "Dr. David Alan Gilbert" <dgilb...@redhat.com> writes: > > > * Markus Armbruster (arm...@redhat.com) wrote: > >> Sizes should use QAPI type 'size' (uint64_t). balloon parameter > >> @value is 'int' (int64_t). qmp_balloon() implicitly converts to > >> ram_addr_t, i.e. uint64_t. BALLOON_CHANGE parameter @actual and > >> BalloonInfo member @actual are also 'int'. > >> virtio_balloon_set_config() and virtio_balloon_stat() implicitly > >> convert from ram_addr_t. > >> > >> Change all three to 'size', and adjust the code using them. > >> > >> balloon now accepts size values between 2^63 and 2^64-1. It accepts > >> negative values as before, because that's how the QObject input > >> visitor works for backward compatibility. > >> > >> Doing the same for HMP's balloon deserves its own commit (the next > >> one). > >> > >> BALLOON_CHANGE and query-balloon now report sizes above 2^63-1 > >> correctly instead of their (negative) two's complement. > >> > >> So does HMP's "info balloon". > >> > >> Signed-off-by: Markus Armbruster <arm...@redhat.com> > >> --- > >> balloon.c | 2 +- > >> hmp.c | 2 +- > >> qapi-schema.json | 4 ++-- > >> qapi/event.json | 2 +- > >> 4 files changed, 5 insertions(+), 5 deletions(-) > >> > >> diff --git a/balloon.c b/balloon.c > >> index 1d720ff..2ecca76 100644 > >> --- a/balloon.c > >> +++ b/balloon.c > >> @@ -102,7 +102,7 @@ BalloonInfo *qmp_query_balloon(Error **errp) > >> return info; > >> } > >> > >> -void qmp_balloon(int64_t target, Error **errp) > >> +void qmp_balloon(uint64_t target, Error **errp) > >> { > >> if (!have_balloon(errp)) { > >> return; > > > > Can't you remove the: > > if (target <= 0) { > > > > check? > > Functional change when target == 0. Impact is not clear to me.
Hmm yes; I don't know whether 0 is legal. Dave > > (The type of the trace_balloon_event probably needs fixing > > to be uint64_t rather than the unsigned long) > > You're right. I'll fix it. > > >> diff --git a/hmp.c b/hmp.c > >> index 8257dd0..4556045 100644 > >> --- a/hmp.c > >> +++ b/hmp.c > >> @@ -781,7 +781,7 @@ void hmp_info_balloon(Monitor *mon, const QDict *qdict) > >> return; > >> } > >> > >> - monitor_printf(mon, "balloon: actual=%" PRId64 "\n", info->actual >> > >> 20); > >> + monitor_printf(mon, "balloon: actual=%" PRIu64 "\n", info->actual >> > >> 20); > >> > >> qapi_free_BalloonInfo(info); > >> } > >> diff --git a/qapi-schema.json b/qapi-schema.json > >> index 3ad2bc0..23eb60d 100644 > >> --- a/qapi-schema.json > >> +++ b/qapi-schema.json > >> @@ -2003,7 +2003,7 @@ > >> # Since: 0.14.0 > >> # > >> ## > >> -{ 'struct': 'BalloonInfo', 'data': {'actual': 'int' } } > >> +{ 'struct': 'BalloonInfo', 'data': {'actual': 'size' } } > >> > >> ## > >> # @query-balloon: > >> @@ -2603,7 +2603,7 @@ > >> # <- { "return": {} } > >> # > >> ## > >> -{ 'command': 'balloon', 'data': {'value': 'int'} } > >> +{ 'command': 'balloon', 'data': {'value': 'size'} } > >> > >> ## > >> # @Abort: > >> diff --git a/qapi/event.json b/qapi/event.json > >> index 6d22b02..9dfc70b 100644 > >> --- a/qapi/event.json > >> +++ b/qapi/event.json > >> @@ -488,7 +488,7 @@ > >> # > >> ## > >> { 'event': 'BALLOON_CHANGE', > >> - 'data': { 'actual': 'int' } } > >> + 'data': { 'actual': 'size' } } > > > > I was going to ask whether that was a problem for any external users, > > but there again libvirt looks like it reads it into an unsigned long > > long. > > Yes. See also my reply to Juan's review of PATCH 15. -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK