From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: Olof Johansson <olof@austin.ibm.com>, Andi Kleen <ak@suse.de>,
Linus Torvalds <torvalds@osdl.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
linuxppc64-dev <linuxppc64-dev@lists.linuxppc.org>
Subject: Re: [PATCH] ppc64: Add iommu=on for enabling DART on small-mem machines
Date: Sun, 29 Feb 2004 17:26:50 +1100 [thread overview]
Message-ID: <1078036010.10826.34.camel@gaston> (raw)
In-Reply-To: <40417E66.3060707@matchmail.com>
> And maybe even some generic code? :-D
No. It's not possible, at least not at this point. The decision of
allocating the DART space or not (and thus eventually stripping the
max available memory) is done very early. So early that the kernel
isn't yet running at it's link location ;) So the kind of code we
can actually run at this point is limited, with various tweaks to
deal with the relocation issue.
It's not very pretty, I hope we can improve that later, but that
is not something that will happen in the upcoming weeks .
Ben.
prev parent reply other threads:[~2004-02-29 6:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-27 21:51 [PATCH] ppc64: Add iommu=on for enabling DART on small-mem machines olof
[not found] ` <Pine.A41.4.44.0402271524190.43108-100000@forte.austin.ibm.com.suse.lists.linux.kernel>
2004-02-28 12:52 ` Andi Kleen
2004-02-28 14:19 ` Olof Johansson
2004-02-29 5:53 ` Mike Fedyk
2004-02-29 6:26 ` Benjamin Herrenschmidt [this message]
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