Re: [Qemu-devel] [PATCHv4 6/6] ui/vnc: disable adaptive update calculations if not needed

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

于 2014/1/10 0:25, Peter Lieven 写道:
> Am 09.01.2014 09:29, schrieb Wenchao Xia:
>> 于 2014/1/8 17:08, Peter Lieven 写道:
>>> Signed-off-by: Peter Lieven <pl@kamp.de>
>>> ---
>>>    ui/vnc.c |    9 +++++++++
>>>    1 file changed, 9 insertions(+)
>>>
>>> diff --git a/ui/vnc.c b/ui/vnc.c
>>> index da552fe..a742d32 100644
>>> --- a/ui/vnc.c
>>> +++ b/ui/vnc.c
>>> @@ -3170,7 +3170,9 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
>>>                acl = 1;
>>>    #endif
>>>            } else if (strncmp(options, "lossy", 5) == 0) {
>>> +#ifdef CONFIG_VNC_JPEG
>>>                vs->lossy = true;
>>> +#endif
>>>            } else if (strncmp(options, "non-adaptive", 12) == 0) {
>>>                vs->non_adaptive = true;
>>>            } else if (strncmp(options, "share=", 6) == 0) {
>>> @@ -3187,6 +3189,13 @@ void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
>>>            }
>>>        }
>>>
>>> +    /* adaptive updates are only used with tight encoding and
>>> +     * if lossy updates are enabled so we can disable all the
>>> +     * calculations otherwise */
>>> +    if (!vs->lossy) {
>>> +        vs->non_adaptive = true;
>>> +    }
>>> +
>>    The code seems: if vs->loosy == false, then vs->non_adaptive = true,
>> translate as: if loosy update is not used, then don't do adaptive
>> update., which doesn't conform with the comments. I am not sure if this
>> is on expectation.
> It don't see the logic break. The option means non_adaptive, not adaptive.
> 
> I write "adaptive updates are only used ... with lossy updates...". Which

  So tight encoding means loosy updates?

> is the same as "without lossy updates we don't need adaptive updates".
> 
> Peter
> 
>>
>>
>>>    #ifdef CONFIG_VNC_TLS
>>>        if (acl && x509 && vs->tls.x509verify) {
>>>            if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
>>>
> 
>