[Xen-devel] [PATCH] xen/balloon: cancel ballooning if adding new memory failed

[David Vrabel <david.vrabel@xxxxxxxxxx>]

If the balloon driver is adding additional memory regions to the
balloon and add_memory() fails it will likely continuously fail so
cancel the balloon operation.

Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
---
 drivers/xen/balloon.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 5c660c7..1e0a317 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -230,8 +230,8 @@ static enum bp_state reserve_additional_memory(long credit)
        rc = add_memory(nid, hotplug_start_paddr, balloon_hotplug << 
PAGE_SHIFT);
 
        if (rc) {
-               pr_info("%s: add_memory() failed: %i\n", __func__, rc);
-               return BP_EAGAIN;
+               pr_warn("Cannot add additional memory (%i)\n", rc);
+               return BP_ECANCELED;
        }
 
        balloon_hotplug -= credit;
-- 
1.7.10.4


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