Bug#784688: Thousands of "xen:balloon: Cannot add additional memory (-17) messages" despite dom0 ballooning disabled

[Ian Campbell <ijc@debian.org>]

On Wed, 2016-01-27 at 10:57 +0000, Ian Campbell wrote:
> 
> I'm still unable to spot what might have changed between 3.16.7-ckt20-
> 1+deb8u2 and 4.3.3-5 though to explain it going away, which I'd still
> quite liketo get to the bottom of in order to fix in Jessie.

I spent a bit of time investigating this, but sadly I'm not able to
reproduce the basis failure.

I've tried the combinations below and all are OK. Some of them produce 1 or
2 of the "-17" messages (I should have noted which but didn't, I think it
was most) but in no case did I see thousands of them.

Ian.

for i in $(seq 1 15) ; do xl reboot debian.guest.osstest ; sleep 10s; done

dom0_mem=2048M,max:2056M
L: 3.16.7-ckt20-1+deb8u3
X: 4.6.0-1+nmu1

=> OK

dom0_mem=2048M,max:2048M
L: 3.16.7-ckt20-1+deb8u3
X: 4.6.0-1+nmu1

=> OK

dom0_mem=2048M,max:2048M
L: 3.16.7-ckt9-3~deb8u1
X: 4.6.0-1+nmu1

=> OK

---------------------------------------------------------------------

for i in $(seq 1 15) ; do xl create /etc/xen/debian.guest.osstest.cfg ; sleep 10s ;  xl shutdown -w debian.guest.osstest; sleep 5s; done

dom0_mem=2048M,max:2048M
L: 3.16.7-ckt9-3~deb8u1
X: 4.6.0-1+nmu1

=> OK

dom0_mem=2048M,max:2048M
L: 3.16.7-ckt9-3~deb8u1
X: 4.4.1-9+deb8u3

=> OK