From: Andi Kleen <ak@suse.de>
To: Hugh Dickins <hugh@veritas.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2.5] ACPI_HT_ONLY acpismp=force
Date: 25 Jun 2003 22:53:08 +0200 [thread overview]
Message-ID: <p73isqt516z.fsf@oldwotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.44.0306252112180.1636-100000@localhost.localdomain.suse.lists.linux.kernel>
Hugh Dickins <hugh@veritas.com> writes:
> What's the point of bootparam "acpismp=force"? A way to change
> your mind if you just said "acpi=off"? A hurdle to jump to get
> CONFIG_ACPI_HT_ONLY to do what you ask? 2.4.18 used to need it to
> enable HT, but not recent releases. It can't configure in what's
> not there, and now serves only to confuse: kill it.
There are some boxes that don't work with the new ACPI code, but need
minimal acpi parsing for hyperthreaded CPUs etc.
To get these still to work the compatibility option is offered.
Basically it's another safety net. Of course it would be better
to make new ACPI work everywhere, but it's quite difficult.
For 2.4 it's better to have the fallback.
-Andi
next parent reply other threads:[~2003-06-25 20:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44.0306252112180.1636-100000@localhost.localdomain.suse.lists.linux.kernel>
2003-06-25 20:53 ` Andi Kleen [this message]
2003-06-25 22:29 ` [PATCH 2.5] ACPI_HT_ONLY acpismp=force Hugh Dickins
2003-06-25 20:18 Hugh Dickins
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