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

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

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.

~Andrew

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