From: Andi Kleen <andi@firstfloor.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Pavel Machek <pavel@ucw.cz>,
kernel list <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: iommu: it could use some documentation
Date: 21 Mar 2008 16:55:51 +0100 [thread overview]
Message-ID: <87bq58hy0o.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20080319151346.GA28798@elte.hu>
Ingo Molnar <mingo@elte.hu> writes:
>
> > + iommu= [x86]
> > + off
> > + force
> > + noforce
> > + biomerge
> > + panic
> > + nopanic
> > + merge
> > + nomerge
> > + forcesac
> > + soft
>
> these are mostly quirks to get boards booting
Actually no. Except perhaps for iommu=soft none of them is related
to any hardware issues. They all tune various performance trade offs
and were supplied for performance tuning originally.
-Andi
next prev parent reply other threads:[~2008-03-21 15:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-19 14:58 iommu: it could use some documentation Pavel Machek
2008-03-19 15:06 ` Ingo Molnar
2008-03-19 15:13 ` Ingo Molnar
2008-03-21 15:55 ` Andi Kleen [this message]
2008-03-21 15:53 ` Andi Kleen
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