kernel-packages team mailing list archive

[David Vrabel <david.vrabel@xxxxxxxxxx>]

Can you try this patch?

8<----------------------
xen/balloon: cancel ballooning if adding new memory failed

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..45aca60 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_info("cannot add additional memory (%i)\n", rc);
+		return BP_ECANCELED;
 	}
 
 	balloon_hotplug -= credit;
-- 
1.7.10.4

-- 
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https://bugs.launchpad.net/bugs/1304001

Title:
   xen:balloon errors in 14.04 beta

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Xen balloon errors on HVM instances on EC2 (Xen 4.2.amazon):


  
  ubuntu@ip-10-63-20-99:~$ uname -a
  Linux ip-10-63-20-99 3.13.0-23-generic #45-Ubuntu SMP Fri Apr 4 06:58:38 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  ubuntu@ip-10-63-20-99:~$ dmesg  |grep xen
  [    0.000000] xen:events: Xen HVM callback vector for event delivery is enabled
  [    0.494613] xen:balloon: Initialising balloon driver
  [    0.496046] xen_balloon: Initialising balloon driver
  [    0.500077] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [    0.541047] Switched to clocksource xen
  [    0.562579] xen: --> pirq=16 -> irq=8 (gsi=8)
  [    0.562622] xen: --> pirq=17 -> irq=12 (gsi=12)
  [    0.562649] xen: --> pirq=18 -> irq=1 (gsi=1)
  [    0.562673] xen: --> pirq=19 -> irq=6 (gsi=6)
  [    0.562705] xen: --> pirq=20 -> irq=4 (gsi=4)
  [    0.920527] xen: --> pirq=21 -> irq=47 (gsi=47)
  [    0.920596] xen:grant_table: Grant tables using version 1 layout
  [    1.029661] xen_netfront: Initialising Xen virtual ethernet driver
  [    1.236083] xenbus_probe_frontend: Device with no driver: device/vfb/0
  [    2.516067] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [    6.533941] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [   14.560075] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [   30.592064] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [   62.688153] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [   94.752164] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  126.816161] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  158.880084] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  190.944069] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  223.008141] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  255.072112] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  287.136190] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  319.200053] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  351.264164] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  383.328080] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  415.392077] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  447.456112] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  479.520128] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  511.584110] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  543.648181] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  575.712070] xen:balloon: reserve_additional_memory: add_memory() failed: -17
  [  607.776178] xen:balloon: reserve_additional_memory: add_memory() failed: -17

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