From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] Stop pci_set_dma_mask() from failing when RAM doesn't exceed the mask anyway
Date: Sun, 02 Aug 2009 17:50:37 +1000 [thread overview]
Message-ID: <1249199437.12047.11.camel@pasglop> (raw)
In-Reply-To: <1249117220.20192.1083.camel@macbook.infradead.org>
On Sat, 2009-08-01 at 10:00 +0100, David Woodhouse wrote:
> I'm not sure. Losing 16MiB on a machine which only has 512MiB anyway
> doesn't seem ideal, and we'll want to make the no-iommu code DTRT
> _anyway_, surely?
>
> So we might as well let the DART keep its existing logic (which is
> only
> to bother if we have more than 1GiB of RAM;
Ah right, so when do we enable the DART ? Above 1G ? I though it was
above 2G but we may well have moved that down to 1G just for b43 indeed.
I definitely agree on the fix to the mask so it only compares to the
available RAM. I'll check that in when I'm back from the snow fields
on tuesday :-)
Cheers,
Ben,
next prev parent reply other threads:[~2009-08-02 7:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-31 19:41 [PATCH] Stop pci_set_dma_mask() from failing when RAM doesn't exceed the mask anyway David Woodhouse
2009-07-31 22:25 ` Benjamin Herrenschmidt
2009-08-01 7:54 ` David Woodhouse
2009-08-01 8:00 ` Benjamin Herrenschmidt
2009-08-01 9:00 ` David Woodhouse
2009-08-02 7:50 ` Benjamin Herrenschmidt [this message]
2009-08-03 13:14 ` David Woodhouse
2009-08-03 21:05 ` Benjamin Herrenschmidt
2009-08-10 6:46 ` Benjamin Herrenschmidt
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