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Date:      Tue, 28 Feb 2012 08:23:27 -0700
From:      Scott Long <scottl@samsco.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-current@freebsd.org, Devin Teske <dteske@vicor.com>, Andriy Gapon <avg@freebsd.org>
Subject:   Re: revisiting tunables under Safe Mode menu option
Message-ID:  <14F8E8BB-F952-431E-B1DB-E171D87293AE@samsco.org>
In-Reply-To: <201202280846.08966.jhb@freebsd.org>
References:  <4F26CC5A.2070501@FreeBSD.org> <4F4C0600.2000903@FreeBSD.org> <3BA1B476-ED05-4E8E-8DFA-0B06EFB48867@samsco.org> <201202280846.08966.jhb@freebsd.org>

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On Feb 28, 2012, at 6:46 AM, John Baldwin wrote:

> On Tuesday, February 28, 2012 1:23:11 am Scott Long wrote:
>> I still think that it's useful to be able to disable ACPI.  Just =
because=20
> ACPI works well on modern hardware doesn't mean that everything crummy =
from=20
> 2000-2007 suddenly disappeared off the face of the earth.  But I agree =
that=20
> turning it off on modern systems probably does more harm than good.  =
Hence my=20
> suggestion for a finer control over this in the menu.  Maybe Devin =
Teske can=20
> lend some help with this task?  For extra credit, it should be =
possible to=20
> write a simple static analysis tool that collects all of the tunables =
that are=20
> compiled into the kernel and generates a data file that the boot menu =
can=20
> process and turn into interactive knobs for the user.
>=20
> Hmm, with the newer boot menu, can't one now toggle safe mode and ACPI=20=

> independently?  (Assuming we haven't removed the ability to disable =
ACPI from=20
> the menu, if we have we should perhaps put that back).  Having them be=20=

> orthogonal knobs would seem to the be the best approach.
>=20

Yes, Andriy reminded me of this last night, so I withdraw my comments.

Scott




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