If num_ballooned is not 0, we shouldn't neglect the already-allocated 2MB
memory block(s).
Cc: K. Y. Srinivasan <k...@microsoft.com>
Cc: <sta...@vger.kernel.org>
Signed-off-by: Dexuan Cui <de...@microsoft.com>
---
drivers/hv/hv_balloon.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 5e90c5d..cba2d3b 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -1091,6 +1091,8 @@ static void balloon_up(struct work_struct *dummy)
bool done = false;
int i;
+ /* The host does balloon_up in 2MB. */
+ WARN_ON(num_pages % PAGES_IN_2M != 0);
/*
* We will attempt 2M allocations. However, if we fail to
@@ -1111,7 +1113,7 @@ static void balloon_up(struct work_struct *dummy)
bl_resp, alloc_unit,
&alloc_error);
- if ((alloc_error) && (alloc_unit != 1)) {
+ if (alloc_error && (alloc_unit != 1) && num_ballooned == 0) {
alloc_unit = 1;
continue;
}
--
1.9.1
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