Re: [Xen-devel] [PATCH 05/15] xen: make it possible to disable tracing in Kconfig.

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 08/06/17 16:35, Jan Beulich wrote:
>>>> On 08.06.17 at 17:16, <george.dunlap@xxxxxxxxxx> wrote:
>> On 07/06/17 16:14, Jan Beulich wrote:
>>>>>> On 01.06.17 at 19:34, <dario.faggioli@xxxxxxxxxx> wrote:
>>>> --- a/xen/Kconfig.debug
>>>> +++ b/xen/Kconfig.debug
>>>> @@ -98,6 +98,14 @@ config PERF_ARRAYS
>>>>    ---help---
>>>>      Enables software performance counter array histograms.
>>>>  
>>>> +config TRACING
>>>> +  bool "Tracing"
>>>> +  default y
>>>
>>> default DEBUG (you don't want to suggest turning it on for a
>>> release build)
>>
>> In the past I've found it pretty useful to have on in release builds of
>> XenServer, to analyze performance problems a customer was having, and
>> sometimes to see where the guest was crashing.
> 
> Well, that's your choice. I'm only asking to default to off in release
> builds, not to prevent enabling it.

Of course; the question is, as you say, what we're "suggesting"; and
what people will experience if they just go with the default.

If it were up to me I'd leave it on by default, but I don't have a
strong opinion.

 -George

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