On Mon, 2 Mar 2015 15:50:19 +0100
Peter Krempa <pkre...@redhat.com> wrote:
> On Thu, Feb 26, 2015 at 14:49:15 -0500, Luiz Capitulino wrote:
> > Add memory hotplug options to the command-line format. Also,
> > add a complete command-line example and improve description.
> >
> > Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com>
> > ---
> > qemu-options.hx | 23 ++++++++++++++++++-----
> > 1 file changed, 18 insertions(+), 5 deletions(-)
> >
> > diff --git a/qemu-options.hx b/qemu-options.hx
> > index 85ca3ad..1634175 100644
> > --- a/qemu-options.hx
> > +++ b/qemu-options.hx
> > @@ -237,12 +237,25 @@ DEF("m", HAS_ARG, QEMU_OPTION_m,
> > "NOTE: Some architectures might enforce a specific granularity\n",
> > QEMU_ARCH_ALL)
> > STEXI
> > -@item -m [size=]@var{megs}
> > +@item -m [size=]@var{megs}[,slots=n,maxmem=size]
> > @findex -m
> > -Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB.
> > Optionally,
> > -a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or
> > -gigabytes respectively. Optional pair @var{slots}, @var{maxmem} could be
> > used
> > -to set amount of hotluggable memory slots and possible maximum amount of
> > memory.
> > +Sets guest startup RAM size to @var{megs} megabytes. Default is 128 MiB.
> > +Optionally, a suffix of ``M'' or ``G'' can be used to signify a value in
> > +megabytes or gigabytes respectively. Optional pair @var{slots},
> > @var{maxmem}
> > +could be used to set amount of hotpluggable memory slots and maximum
> > amount of
> > +memory.
> > +
> > +For example, the following command-line sets the guest startup RAM size to
> > +1GB, creates 3 slots to hotplug additional memory and sets the maximum
> > +memory the guest can reach to 4GB:
> > +
> > +@example
> > +qemy-system-i386 -m 1G,slots=3,maxmem=4G
> > +@end example
> > +
> > +If @var{slots} and @var{maxmem} are not specified, memory hotplug won't
> > +be enabled and the guest startup RAM will never increase (although it can
> > +be decreased with the use of ballooning).
> > ETEXI
>
> It might be also worth noting that maxmem has to be aligned to the page
> size. See:
> http://lists.gnu.org/archive/html/qemu-devel/2015-01/msg04345.html
>
> (unfortunately it was not merged yet for some reason ...)
it wasn't lost, it's in the last (today's) pull req from PCI tree.
>
> Peter
