From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Tabi Timur-B04825 <B04825@freescale.com>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
Aaro Koskinen <aaro.koskinen@iki.fi>
Subject: Re: PPC64 & DMA zone
Date: Sun, 02 Sep 2012 13:12:48 +1000 [thread overview]
Message-ID: <1346555568.3025.0.camel@pasglop> (raw)
In-Reply-To: <6AE080B68D46FC4BA2D2769E68D765B708019EB2@039-SN2MPN1-022.039d.mgd.msft.net>
On Sun, 2012-09-02 at 02:54 +0000, Tabi Timur-B04825 wrote:
> On Fri, Aug 17, 2012 at 3:40 PM, Benjamin Herrenschmidt
> <benh@kernel.crashing.org> wrote:
> > On Fri, 2012-08-17 at 23:04 +0300, Aaro Koskinen wrote:
> >> Hi,
> >>
> >> Is there a way to reduce/limit DMA zone with PPC64 kernel (3.6-rcX)
> >> on G5 Mac? I have tried to search Kconfig or command line options,
> >> but can't find anything.
> >
> > No.
>
> What about Shaohui patches for ZONE_DMA? That's meant to solve
> exactly this problem? Granted, it sets the DMA zone to 31 bits, but
> it's simple to hack that to 30 bits.
Unnecessary for this specific problem. The right fix to the iommu code
has already been done.
Cheers,
Ben.
prev parent reply other threads:[~2012-09-02 3:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-17 20:04 PPC64 & DMA zone Aaro Koskinen
2012-08-17 20:40 ` Benjamin Herrenschmidt
2012-08-17 21:01 ` Aaro Koskinen
2012-08-17 21:38 ` Benjamin Herrenschmidt
2012-09-02 2:54 ` Tabi Timur-B04825
2012-09-02 3:12 ` Benjamin Herrenschmidt [this message]
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