Re: [Xen-devel] [PATCH 0/4] Allow schedulers to be selectable through Kconfig

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.01.16 at 15:01, <jonathan.creekmore@xxxxxxxxx> wrote:

> Ian Campbell writes:
> 
>> I don't see this as contrary to your stated goals (e.g. ripping out all the
>> other schedulers), but I consider you to be within the expert camp for
>> wanting to do so (and having the chops to handle whatever pieces you find
>> yourselves with). I have no objections at all to allowing experts such as
>> yourselves to configure things and I applaud you for doing this in an
>> upstream way (it is the right thing to do).
>>
>> My concern is that while you rightly consider yourselves expert enough and
>> are building something for a specific (and AIUI targeted) use case many
>> normal users tend to think that if they are expert enough to find and flip
>> the switch then they are expert enough to deal with the consequences, when
>> they are not and/or they do not have the specific use case which the switch
>> was added to support i.e. they want common or garden Xen and we want that
>> to mean the same for everyone.
>>
>> It's those people (including general purpose distro maintainers) who I
>> think need to be strongly discouraged from messing with these options
>> because there will be a strong gravity towards them doing so.
> 
> So, if I add a patch in a v3 of this series that introduces a
> CONFIG_EXPERT option and hides all of the scheduler options behind that,
> would that be acceptible? That is a proposal that was mentioned on this
> thread before.

With me asking for that option to not have a visible prompt by default,
but nevertheless being settable. I do realize that this may not be
possible with the current kconfig tool, but that's imo the only way to
keep people from playing with expert options just because they see
there's a prompt. No textual warning will help this, I'm afraid.

Jan


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