A simple true/false internal state does not allow multiple users. Fix
this within the existing interface by converting to a counter, so long
as the counter is elevated, ballooning is inhibited.
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---
balloon.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/balloon.c b/balloon.c
index 6bf0a9681377..2a6a7e1a22a0 100644
--- a/balloon.c
+++ b/balloon.c
@@ -37,16 +37,17 @@
static QEMUBalloonEvent *balloon_event_fn;
static QEMUBalloonStatus *balloon_stat_fn;
static void *balloon_opaque;
-static bool balloon_inhibited;
+static int balloon_inhibited;
bool qemu_balloon_is_inhibited(void)
{
- return balloon_inhibited;
+ return balloon_inhibited > 0;
}
void qemu_balloon_inhibit(bool state)
{
- balloon_inhibited = state;
+ balloon_inhibited += (state ? 1 : -1);
+ assert(balloon_inhibited >= 0);
}
static bool have_balloon(Error **errp)
