Re: Question to Xen log level in the case of PT

["Chen, Tiejun" <tiejun.chen@intel.com>]

>> So can Xen change log level dynamically like Linux? If yes, we might
>> change this level temporarily while passing through IGD. If not, any
>> suggestion?
>
> First of all you could boot without lowering the log level (non-debug
> builds) or raising the log level ("loglvl=warning"; debug builds). But

Sorry I don't know how to build "non-debug" here. Could you give me this 
detail? Or where I can get this info?

> that would change the log level for the entire session, which may
> not be what you're after. I too realized that having a way to
> dynamically adjust the log level would be useful occasionally. For
> post-4.6 I have a patch (attached) ready allowing to do so in a
> limited way from the serial console (and hence also via "xl debug-key").
> As you'll see in there I also took note of it probably being desirable
> to have a sysctl (and then a wrapping xl command) to full control the
> log level. I didn't get around to implement that yet.

Good to know this.

>
> Otoh the specific messages you cite are of quite questionable use
> in the first place. I certainly would welcome a patch lowering their
> priority to XENLOG_G_DEBUG (which however would still not

Done.

Thanks
Tiejun