systemd questions

[Lennart Poettering]

On Thu, 19.05.11 02:06, Matthew Garrett (mjg59 at srcf.ucam.org) wrote:

> 
> On Wed, May 18, 2011 at 07:42:17PM -0400, Simo Sorce wrote:
> 
> > > I am pretty sure we don't want to run Java programs at late boot, as
> > > root. This would be really bad.
> > 
> > You know, it's not like there is a choice for many models ...
> 
> That's really not a given. For anything short of us having to send http 
> requests, there's no fundamental reason why this can't be done 
> in-kernel. For cases where we do have to send http requests, well, 
> that's kind of a separate issue (you want to run java after you've 
> unmounted all the filesystems?)
> 
> > It is not necessary, the hook can be called before you do that last
> > operation, the driver will command the UPS to wait long enough for that
> > operation to finish in time in 99% of the cases.
> > For the remaining 1% of the cases, admins will have to re-tune the delay
> > once power comes up and they find it wasn't enough time after all.
> 
> Or we could work on fixing the problem. We're not talking about an 
> incredibly large maount of code.

In particular, since the power supply class driver already covers UPS:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/power/power_supply_class.txt

Lennart

-- 
Lennart Poettering - Red Hat, Inc.