Re: [Xen-devel] [Qemu-devel] [PATCH v4 2/3] pc & q35: Add new machine opt max-ram-below-4g

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 06/05/14 12:27, Igor Mammedov wrote:
> On Thu,  5 Jun 2014 12:11:55 -0400
> Don Slutz <dslutz@xxxxxxxxxxx> wrote:
>
> > This is a pc & q35 only machine opt.  One use is to allow for more
> > ram in a 32bit guest for example:
> >
> > -machine pc,max-ram-below-4g=3.75G
> >
> > If you add enough PCI devices then all mmio for them will not fit
> > below 4G which may not be the layout the user wanted. This allows
> > you to increase the below 4G address space that PCI devices can use
> > (aka decrease ram below 4G) and therefore in more cases not have any
> > mmio that is above 4G.
> >
> > For example using "-machine pc,max-ram-below-4g=2G" on the command
> > line will limit the amount of ram that is below 4G to 2G.
> >
> > Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
> this patch would look better if rebased on top of
> http://lists.gnu.org/archive/html/qemu-devel/2014-06/msg00133.html
> and would use PCMachine type to add PC specific "max-ram-below-4g" property.
I somehow missed this patch series.  Will work on a rebase on top of this.
    -Don Slutz

>

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