From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Date: Mon, 19 Jan 2004 06:14:38 +0000 Subject: Re: dma restriction on Itanium 2 Message-Id: <20040119061438.GA1437@cup.hp.com> List-Id: References: <1074304095.6384.13.camel@kbiswas-dt.s2iotech.com> In-Reply-To: <1074304095.6384.13.camel@kbiswas-dt.s2iotech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org 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