[Pkg-xen-devel] Bug#927071: Bug#927071: xen: More balloon-leak observation

[Elliott Mitchell]

On Mon, Apr 22, 2019 at 04:02:28PM +0200, Hans van Kranenburg wrote:
> On 4/22/19 1:10 AM, Elliott Mitchell wrote:
> > There is plenty of free memory for creating additional VMs (perhaps too
> > much, and that confused Xen?), so this is really puzzling that memory is
> > being ballooned away from Dom0.  At this point I plan after the next
> > restart to double the allocation for Dom0 and see whether Dom0 is able
> > to last more than a week.
> 
> Weird. Can you log memory stats over time, so that you can see when it
> happens, and correlate it to other events?

At this point there is only one real pattern I've noticed:  Always
`smartd` was the process which triggered the kernel OOM-killer.

Originally I was attributing this to `smartd` doing some large memory
allocation during its night-time tasks (which I would attribute to
perhaps `smartd` not being that well written).  Yet now, I never saw
anything else trigger the OOM-killer and I'm now willing to speculate
some I/O operation `smartd` was doing triggers a bug in Xen.


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