From: Grant Grundler <iod00d@hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: dma restriction on Itanium 2
Date: Mon, 19 Jan 2004 06:14:38 +0000 [thread overview]
Message-ID: <20040119061438.GA1437@cup.hp.com> (raw)
In-Reply-To: <1074304095.6384.13.camel@kbiswas-dt.s2iotech.com>
On Sat, Jan 17, 2004 at 07:47:10PM +0100, Christian Hinkelbein wrote:
> Grant Grundler wrote:
> >Yes. HPUX has a similar interface for DMA mapping but a completely
> >different VM subsystem. Linux guarantees contiguous physical blocks
> >for multi-page memory allocations. HPUX does not. The linux DMA
> >subsystem uses that assumption.
> you are talking about kernel-mode __get_free_pages and kmalloc,
> and not user-mode malloc, arent you?
yes - kmalloc.
Sorry - I assumed it was clear this whole discussion
was about kernel internals.
grant
next prev parent reply other threads:[~2004-01-19 6:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-17 1:48 dma restriction on Itanium 2 Kallol Biswas
2004-01-17 2:14 ` Grant Grundler
2004-01-17 3:58 ` Grant Grundler
2004-01-17 18:47 ` Christian Hinkelbein
2004-01-19 6:14 ` Grant Grundler [this message]
2004-01-19 16:00 ` Alex Williamson
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