hv_balloon: disable warning when floor reached

BugLink: https://bugs.launchpad.net/bugs/1905618
[ Upstream commit 2c3bd2a5c86fe744e8377733c5e511a5ca1e14f5 ]

It is not an error if the host requests to balloon down, but the VM
refuses to do so. Without this change a warning is logged in dmesg
every five minutes.

Fixes:  b3bb97b8a49f3 ("Drivers: hv: balloon: Add logging for dynamic memory operations")
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20201008071216.16554-1-olaf@aepfle.de
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 930674117533ef2d5a5c57ec152215bc193311a4..bd4e72f6dfd49d64ba66b09255f3b365b26bc42f 100644 (file)
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -1277,7 +1277,7 @@ static void balloon_up(struct work_struct *dummy)
 
        /* Refuse to balloon below the floor. */
        if (avail_pages < num_pages || avail_pages - num_pages < floor) {
-               pr_warn("Balloon request will be partially fulfilled. %s\n",
+               pr_info("Balloon request will be partially fulfilled. %s\n",
                        avail_pages < num_pages ? "Not enough memory." :
                        "Balloon floor reached.");