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).
> ETEXIIt 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 ...) Peter
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