cvs commit: src/sys/dev/acpica acpi_thermal.c

[Poul-Henning Kamp]

In message <200402021803.i12I3ZJW016336 at repoman.freebsd.org>, Nate Lawson write
s:
>njl         2004/02/02 10:03:35 PST
>
>  FreeBSD src repository
>
>  Modified files:
>    sys/dev/acpica       acpi_thermal.c 
>  Log:
>  If the temperature is at _HOT or _CRT for 3 sequential readings, shutdown
>  the system. 

I realize that this is an important feature to preserve the hardware,
but I still find it rather draconian, and suboptimal from a UI
perspective.

Could we change it to be:

	after N seconds:	go to single user.
	after N + M seconds:	shutdown.

This would normally allow X11 to shut down cleanly, which again
means we can printf a message to the user about what is happening
instead of simply going black screen on them.

It would also save people some fsck'ing subsequently.

I realize there is a rainbow of bikeshed proposals about not
scheduling non-root/userland/cpu-hog processes etc etc etc.

Apart from the fact that it is merely sugarcoating the broccoli,
we are not geared for that scheduler-wise and we should not add
features to our schedulers until the current issues with them have
been solved and settled.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.