From: David Mosberger <davidm@hpl.hp.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: davidm@hpl.hp.com, tony.luck@intel.com,
arjanv@redhat.com (Arjan van de Ven),
linux-kernel@vger.kernel.org, linux-ia64@linuxia64.org,
marcelo@conectiva.com.br, davem@redhat.com
Subject: Re: [Linux-ia64] patch to no longer use ia64's software mmu
Date: Tue, 4 Dec 2001 10:06:04 -0800 [thread overview]
Message-ID: <15373.4236.462183.167170@napali.hpl.hp.com> (raw)
In-Reply-To: <E16BJqq-0002qu-00@the-village.bc.nu>
In-Reply-To: <15373.2854.619707.822462@napali.hpl.hp.com> <E16BJqq-0002qu-00@the-village.bc.nu>
>>>>> On Tue, 4 Dec 2001 17:59:28 +0000 (GMT), Alan Cox <alan@lxorguk.ukuu.org.uk> said:
Alan> ISA DMA. While there is no ISA DMA on ia64 (thankfully) many
Alan> PCI cards have 26-31 bit limits.
>> We could do this if we there was a GFP_4GB zone. Now that 2.5
>> is open for business, it won't be long, right?
Alan> I don't see the need: GFP_DMA is the ISA DMA zone. pci_* API
Alan> is used by everyone else [for 2.5].
Without a 4GB zone, you may end up creating bounce buffers needlessly
for 32-bit capable DMA devices, no?
--david
next prev parent reply other threads:[~2001-12-04 18:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-03 21:00 Arjan van de Ven
2001-12-03 21:47 ` [Linux-ia64] " David Mosberger
2001-12-03 21:53 ` Arjan van de Ven
2001-12-04 9:36 ` Alan Cox
2001-12-04 20:22 ` David S. Miller
2001-12-04 16:26 ` David Mosberger
2001-12-04 16:32 ` Arjan van de Ven
2001-12-04 17:18 ` Alan Cox
2001-12-04 17:43 ` David Mosberger
2001-12-04 17:59 ` Alan Cox
2001-12-04 18:06 ` David Mosberger [this message]
2001-12-04 18:14 ` David Mosberger
2001-12-04 18:19 ` Alan Cox
2001-12-04 20:32 ` David Mosberger
2001-12-04 14:25 ` Andreas Schwab
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