| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
RE: [Xen-devel] More on 2.6.28 and balloon driver
Hi Jeremy --
It appears that in the upstream balloon driver,
the call to HYPERVISOR_update_va_mapping is missing
from decrease_reservation. I think as a result,
the balloon driver is eating memory but not
releasing it to Xen, thus rendering the balloon
driver essentially useless. (Can be observed via xentop.)
Is this just a bug/oversight, or was there maybe
a problem pushing this code upstream?
Thanks,
Dan
P.S. Also please see related balloon driver thread
on xen-devel yesterday (Jan 06).
> -----Original Message-----
> From: Dan Magenheimer
> Sent: Tuesday, January 06, 2009 5:53 PM
> To: Xen-Devel (E-mail)
> Subject: [Xen-devel] More on 2.6.28 and balloon driver
>
>
> Can't prove it yet, but it appears that when 2.6.28
> is ballooned to use less memory, the pages aren't
> actually returned to the domain's available pool
> of memory in Xen.
>
> I've got some code (to be posted soon) that does
> an alloc_domheap_pages(d,0,0) after domain d balloons
> to use less memory. The code works with linux-2.6.18-xen
> and linux-2.6.27-xen, but not with 2.6.28... the
> allocate fails.
>
> Any good reason why this might be different? Or should
> I dig for a bug / code difference?
>
> Also, I am still on xen 3.3.0+ so if this was fixed
> later, please let me know.
>
> Dan
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
>
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home