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Re: patch: add instrumentation to xen/x86/autoconf.c



Christoph Badura <bad%bsd.de@localhost> writes:

> On Tue, Jan 22, 2019 at 10:55:17AM +0800, Cherry G. Mathew wrote:
>> The advantage is that it can be turned on/off at boot time rather than
>> compile time.
>
> Yes, but then you have to remember to boot -d. :-)
>
> Switching this file to aprint_debug* isn't as useful as you might think.
> You'd have to go into kern_subr.c:setroot() and rf_netbsdkintf.c at
> least.  And you might want to update all the machine dependent code
> that sets booted_device, too.  But then you would get temped to get
> distracted by all the duplicated and diverged code for boot device
> detection...
>
> I'm not going into that part auf Augean stables. :-)  Although cleaning them
> out would be worthwhile.
>
> If I do spend more time in this file, I'd rather work on actually
> passing the boot device to the kernel.

I have no objection to this. It's a self contained change that works as
intended.

-- 
~cherry



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