Subject: Re: interleaved disk probing output
To: None <kpneal@pobox.com>
From: Bill Studenmund <wrstuden@netbsd.org>
List: tech-kern
Date: 10/13/2003 10:01:24
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On Fri, Oct 10, 2003 at 07:35:37PM -0400, kpneal@pobox.com wrote:
> On Fri, Oct 10, 2003 at 10:30:45AM -0700, Alex Barclay wrote:
> > You could store the output from each driver and then as you advance=20
> > through the tree output the data in order. This would not slow down the=
=20
> > boot as it would only be the output that held.
> >=20
> > An example assuming wd came before sd which came before com
> >=20
> > t action output
> > 0 probed com0
> > 1 probed wd0 wd0 at .........
> > 2 probed sd0 sd0 at ...........
> > com0 at .........
>=20
> I'd hate to see an implementation that threw away data if the system
> hangs before finishing. By throwing away, I mean the user never sees
> it. What if the probe of the sd0 causes a hang? Nobody will ever
> know about com0.
Note that by hang in this context you are talking about the kernel never=20
entering single-user mode, as we never fully boot. In that case, what does=
=20
it matter if com0 is or isn't mentioned? :-)
Take care,
Bill
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