re: CVS commit: src/sys/arch

[Paul Goyette <paul%vps1.whooppee.com@localhost>]

For i386 and amd64:

non-XEN GENERIC is MODULAR, and the sysmon drivers will be autoloaded as 
necesary.  Confirmed by successful running of atf test suite.

For other platforms:

MODULAR kernels are unaffected, as drivers will be autoloaded.

Non-MODULAR kernels will contain sysmon sub-components only when there 
are active "references".  For example, if the kernel contains a watchdog 
device, sysmon_wdog will be included;  if it contains a sensor device, 
sysmon_envsys will be included; and if the kernel contains a power 
button driver, sysmon_power will be included.

I updated the x86/XEN configs because there are atf tests running, and 
those tests fail due to non-support of some sysmon sub-components.  The 
only functionality being lost is the ability to run wdogctl(8) or 
envstat(8) only to find out that there are no watchdog timers or sensors 
included in the kernel.  (Since the kernel is non-MODULAR, there's no 
chance of adding devices at run-time.)  Opening the various sysmon minor 
device will return ENODEV, rather than having the GETxxx ioctl return 
empty results.

Arguably, the atf test include/t_paths could have been updated to check 
for the specific error ENODEV and treat that as a PASS.

On Wed, 6 May 2015, matthew green wrote:

> "Paul Goyette" writes:
> > Module Name:	src
> > Committed By:	pgoyette
> > Date:		Tue May  5 22:14:24 UTC 2015
> >
> > Modified Files:
> > 	src/sys/arch/amd64/conf: XEN3_DOMU
> > 	src/sys/arch/i386/conf: XEN3_DOMU
> >
> > Log Message:
> > For non-modular XEN3_DOMU kernels, include sysmon and all of its
> > subcomponents.  While the wdog and envsys subcomponents aren't
> > terribly useful in DOMU environment, this restores functionality
> > to previous (pre-modularized sysmon) state.
>
> does this mean that non-xen GENERIC is missing this functionality?
> that's a general regression.
>
>
> .mrg.

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