Re: [Xen-devel] [PATCH] build: save generated config in /boot

[Doug Goldstein <cardoe@xxxxxxxxxx>]

On 12/22/15 9:59 AM, Jan Beulich wrote:
>>>> On 22.12.15 at 15:46, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 22/12/15 12:52, Jan Beulich wrote:
>>>>>> On 22.12.15 at 13:45, <cardoe@xxxxxxxxxx> wrote:
>>>> On 12/21/15 9:35 AM, Jan Beulich wrote:
>>>>>>>> On 21.12.15 at 16:20, <cardoe@xxxxxxxxxx> wrote:
>>>>>> On 12/21/15 8:51 AM, Jan Beulich wrote:
>>>>>>>>>> On 21.12.15 at 15:35, <cardoe@xxxxxxxxxx> wrote:
>>>>>>>> On 12/21/15 6:11 AM, Jan Beulich wrote:
>>>>>>>>>>>> On 18.12.15 at 22:35, <cardoe@xxxxxxxxxx> wrote:
>>>>>>>>>> Since we now support changing Xen options with Kconfig, we should 
>>>>>>>>>> save
>>>>>>>>>> the configuration that was used to build up Xen. This will save it in
>>>>>>>>>> /boot alongside the installed xen.gz and call it
>>>>>>>>>> xen-$(FULLVERSION).config
>>>>>>>>>>
>>>>>>>>>> Suggested-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
>>>>>>>>>> Signed-off-by: Doug Goldstein <cardoe@xxxxxxxxxx>
>>>>>>>>>> ---
>>>>>>>>>>  xen/Makefile | 1 +
>>>>>>>>>>  1 file changed, 1 insertion(+)
>>>>>>>>>>
>>>>>>>>>> diff --git a/xen/Makefile b/xen/Makefile
>>>>>>>>>> index 9023863..460b977 100644
>>>>>>>>>> --- a/xen/Makefile
>>>>>>>>>> +++ b/xen/Makefile
>>>>>>>>>> @@ -58,6 +58,7 @@ _install: $(TARGET)$(CONFIG_XEN_INSTALL_SUFFIX)
>>>>>>>>>>      ln -f -s $(T)-$(XEN_FULLVERSION)$(Z) $(D)$(BOOT_DIR)/$(T)$(Z)
>>>>>>>>>>      [ -d "$(D)$(DEBUG_DIR)" ] || $(INSTALL_DIR) $(D)$(DEBUG_DIR)
>>>>>>>>>>      $(INSTALL_DATA) $(TARGET)-syms 
>>>>>>>>>> $(D)$(DEBUG_DIR)/$(T)-syms-$(XEN_FULLVERSION)
>>>>>>>>>> +    $(INSTALL_DATA) $(KCONFIG_CONFIG) 
>>>>>>>> $(D)$(BOOT_DIR)/$(T)-$(XEN_FULLVERSION).config
>>>>>>>>> Was it really suggested to put this into /boot? It has no business
>>>>>>>>> being there...
>>>>>>>> Yes. By multiple people. Ian Campbell was the first person to suggest 
>>>>>>>> it
>>>>>>>> in that location.
>>>>>>> Okay, so I've looked it up, and no, he didn't. He just gave this as one
>>>>>>> possibility:
>>>>>>>
>>>>>>> "It occurred to me this morning that we probably ought to stash the 
>>>>>>> .config
>>>>>>>  somewhere on install in such a way that it can be associated with the 
>>>>>>> Xen
>>>>>>>  binary (i.e. with the same full suffix as the binary itself, not the
>>>>>>>  abridged symlink names), maybe as $(BOOT_DIR)/$(T)-
>>>>>>>  $(XEN_FULLVERSION).config?"
>>>>>>>
>>>>>>> But yes, I'm sorry for not noticing this as an undesirable place right
>>>>>>> away.
>>>>>> Ok well I'm at a loss here because the quote clearly shows him
>>>>>> suggesting that location. Do you have a suggested location because so
>>>>>> far I've just got a no from you on the only suggested location.
>>>>> Match the xen-syms location?
>>>> I guess I fail to grasp the rationale behind not putting it in /boot.
>>> It's the other way around really - you'd have to provide a reason
>>> (other than "Linux does so too") for putting it in /boot.
>>
>> I disagree.
>>
>> Xen being consistent with Linux in this regard is in the best interest
>> of the users of Xen, as they end up finding similar information in
>> similar places.
>>
>> The onus is on you to provide a reason why we should deliberately do
>> something different.
> 
> I'm sorry, but no - why would we slavishly follow what Linux does, no
> matter whether it makes sense?
> 
> Jan
> 

How does it not make sense in this case? That's what Andrew and I are
asking you to explain.

-- 
Doug Goldstein

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