Re: [Qemu-devel] [PATCH] vl.c: remove duplicate call to qemu_get_machine_opts

[Laszlo Ersek <lersek@redhat.com>]

On 02/08/16 19:59, Marcel Apfelbaum wrote:
> On 02/08/2016 06:47 PM, Laszlo Ersek wrote:
>> On 02/08/16 13:27, Marcel Apfelbaum wrote:
>>> On 02/08/2016 02:22 PM, Laszlo Ersek wrote:
>>>> On 02/08/16 12:45, Marcel Apfelbaum wrote:
>>>>> Also we can use current machine properties instead of querying
>>>>> machine's opts.
>>>>
>>>> Why? :) For me at least, you'll have to spell it out.
>>>
>>> The theory would be that is cleaner to call an object property than use
>>> a string
>>> (when possible); compiler helps and so on...
>>>
>>>    object->prop vs find_me_prop("prop")
>>>
>>> Since all machine properties have already been set with the command line
>>> options
>>> we really have no need to use them anymore and we can favor the machine.
>>
>> Yes; what I meant is, where exactly have these properties been set?
>>
> 
> I didn't get it so I followed a theoretical line, sorry :)
> 
> A few lines before:
> 
>     if (qemu_opt_foreach(qemu_get_machine_opts(), machine_set_property,
>                          current_machine, NULL)) {
>         object_unref(OBJECT(current_machine));
>         exit(1);
>     }

Ah, right, the things I missed in that were:
- the object_property_parse() call
- machine_initfn() in "hw/core/machine.c", and the setters it sets up.

FWIW,

Reviewed-by: Laszlo Ersek <lersek@redhat.com>

Thanks
Laszlo


>>>>> Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
>>>>> ---
>>>>>    vl.c | 9 ++++-----
>>>>>    1 file changed, 4 insertions(+), 5 deletions(-)
>>>>>
>>>>> diff --git a/vl.c b/vl.c
>>>>> index 5873248..c03a4fe 100644
>>>>> --- a/vl.c
>>>>> +++ b/vl.c
>>>>> @@ -4353,11 +4353,10 @@ int main(int argc, char **argv, char **envp)
>>>>>            qtest_init(qtest_chrdev, qtest_log, &error_fatal);
>>>>>        }
>>>>>
>>>>> -    machine_opts = qemu_get_machine_opts();
>>>>> -    kernel_filename = qemu_opt_get(machine_opts, "kernel");
>>>>> -    initrd_filename = qemu_opt_get(machine_opts, "initrd");
>>>>> -    kernel_cmdline = qemu_opt_get(machine_opts, "append");
>>>>> -    bios_name = qemu_opt_get(machine_opts, "firmware");
>>>>> +    kernel_filename = current_machine->kernel_filename;
>>>>> +    initrd_filename = current_machine->initrd_filename;
>>>>> +    kernel_cmdline = current_machine->kernel_cmdline;
>>>>> +    bios_name = current_machine->firmware;
>>>>>
>>>>>        opts = qemu_opts_find(qemu_find_opts("boot-opts"), NULL);
>>>>>        if (opts) {
>>>>>
>>>>
>>>> Thanks
>>>> Laszlo
>>>>
>>>
>>
>