Re: [Xen-devel] xenstored memory leak

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 06/07/16 08:31, Juergen Gross wrote:
> While testing some patches for support of ballooning in Mini-OS by using
> the xenstore domain I realized that each xl create/destroy pair would
> increase memory consumption in Mini-OS by about 5kB. Wondering whether
> this is a xenstore domain only effect I did the same test with xenstored
> and oxenstored daemons.
>
> xenstored showed the same behavior, the "referenced" size showed by the
> pmap command grew by about 5kB for each create/destroy pair.
>
> oxenstored seemed to be even worse in the beginning (about 6kB for each
> pair), but after about 100 create/destroys the value seemed to be
> rather stable.

Do you mean that after a while, you see oxenstored not leaking any
further memory, even with new domains being created?

Ocaml is a garbage collected languague, so you would expect the process
to get larger until the GC decides to kick in.

>
> Did anyone notice this memory leak before?

We have not encountered this in XenServer stress scenarios.

(It is entirely possible that this specific to something xl does which
Xapi doesn't.)

~Andrew

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