From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Dan Malek <dan@embeddedalley.com>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>,
Tabi Timur-B04825 <timur@freescale.com>
Subject: Re: Discussion about iopa()
Date: Sat, 10 Feb 2007 09:06:20 +1100 [thread overview]
Message-ID: <1171058780.6578.4.camel@localhost.localdomain> (raw)
In-Reply-To: <0640B069-F05E-4A08-A8EB-C277BEF1466E@embeddedalley.com>
On Fri, 2007-02-09 at 12:13 -0500, Dan Malek wrote:
> On Feb 8, 2007, at 4:26 PM, Benjamin Herrenschmidt wrote:
>
> > I'm really not fan of it.
>
> That's because I think it's a terribly useful function
> and the first step toward some orthogonal VM APIs. :-)
No, I think it's very inefficient to walk the page tables, even worse if
you have PTEs in HIGHMEM. I think it's better to keep track the physical
address from alloc time, something similar than dma_alloc_coherent but
for use with that MURAM thingy.
Cheers,
Ben.
next prev parent reply other threads:[~2007-02-09 22:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-06 11:31 [PATCH 1/4] ucc_geth: Change private immrbar_virt_to_phys to generic iopa Li Yang
2007-02-06 14:26 ` Kumar Gala
2007-02-07 9:34 ` Li Yang-r58472
2007-02-07 16:36 ` Kumar Gala
2007-02-07 16:43 ` Timur Tabi
2007-02-07 16:49 ` Kumar Gala
2007-02-07 17:03 ` Timur Tabi
2007-02-08 5:52 ` Li Yang-r58472
2007-02-08 5:57 ` Kumar Gala
2007-02-08 6:48 ` Li Yang-r58472
2007-02-08 6:53 ` Kumar Gala
2007-02-08 7:06 ` Li Yang-r58472
2007-02-08 7:16 ` Kumar Gala
2007-02-08 7:36 ` Li Yang-r58472
2007-02-08 7:41 ` Kumar Gala
2007-02-08 9:22 ` Discussion about iopa() Li Yang-r58472
2007-02-08 13:41 ` Timur Tabi
2007-02-09 17:08 ` Dan Malek
2007-02-10 2:37 ` Benjamin Herrenschmidt
2007-02-10 18:04 ` Dan Malek
2007-02-10 21:40 ` Benjamin Herrenschmidt
2007-02-10 22:27 ` Dan Malek
2007-02-10 22:42 ` Benjamin Herrenschmidt
2007-02-08 21:26 ` Benjamin Herrenschmidt
2007-02-09 17:13 ` Dan Malek
2007-02-09 22:06 ` Benjamin Herrenschmidt [this message]
2007-02-09 22:46 ` Kumar Gala
2007-02-09 22:51 ` Timur Tabi
2007-02-09 23:06 ` Kumar Gala
2007-02-09 23:10 ` Timur Tabi
2007-02-09 23:19 ` Benjamin Herrenschmidt
2007-02-09 23:22 ` Kumar Gala
2007-02-09 23:33 ` Timur Tabi
2007-02-09 23:43 ` Kumar Gala
2007-02-09 17:06 ` Dan Malek
2007-02-08 13:35 ` [PATCH 1/4] ucc_geth: Change private immrbar_virt_to_phys to generic iopa Timur Tabi
2007-02-09 17:22 ` Dan Malek
2007-02-09 17:26 ` Timur Tabi
2007-02-08 13:27 ` Timur Tabi
2007-02-07 0:19 ` Jeff Garzik
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