Re: Enabling balloon(4) in Xen dom0/domU kernels?

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On Wed, 27 Apr 2011 00:49:44 +0100, Hugo Silva <hugo%barafranca.com@localhost> 
wrote:
> > Do you have ddb.onpanic set to 1?
>
> No, and the machine is some 300km away. Altough I visit from time to
> time, won't be near it again for about a month.

Fair enough :)

> [snip]
> The logs have been rotated in the mean time, I remember seeing 
> messages
> from UVM and perhaps something about targets and numbers changing;
> eventually the dom0 would reboot.
>
> But this was probably with the old code.
>
> I'll assume we're dealing with two different issues here then: dom0
> rebooting with ballooning enabled (gotta make sure it was with the 
> old
> code, becomes irrelevant then) and 5.1 domUs hanging with 100% CPU,
> apparently something to do with low memory and swap on cgd.

I have simplified the locking a bit in the new code. Most of Cherry's 
logic remains below though, except that pages are tracked via pool_cache 
allocations rather than smaller pieces of kmem_alloc().

--
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost