Re: [Xen-devel] [PATCH v8 00/28] Kconfig conversion

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 18/12/15 14:55, Juergen Gross wrote:
> On 18/12/15 15:20, Doug Goldstein wrote:
>> On 12/18/15 4:30 AM, Ian Campbell wrote:
>>> On Tue, 2015-12-15 at 07:12 -0600, Doug Goldstein wrote:
>>>> The following series is a follow on to the Kconfig conversion
>>>> patch series.
>>> 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?
>>>
>>> Maybe no so important right now, but once we start getting user
>>> visible options we are going to want this.
>>>
>>> I hesitate to suggest that we may also want an equivalent of
>>> /proc/kconfig, i.e. hypercall to retrieve the running config, or
>>> even a debug key to dump it to the console. Both of those are
>>> more complex and secondary to installing it somewhere I think.
>>>
>>> Ian.
>>>
>> Yes. I wholeheartedly agree. This is in my follow on patch series
>> that I plan on posting this afternoon.
> With your series applied the hypervisor is being rebuilt each time I
> call "make install" (without any other command in between).
>
> Without the series no rebuild is triggered.

It has always been partially rebuilt a second time, as the timestamp in
a generated header file changes.  It is just far less obvious before
this series.

Fixing this has been low on my todo list for a very long time.

~Andrew

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