From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steffen Persvold Date: Thu, 30 Aug 2001 06:39:06 +0000 Subject: [Linux-ia64] Re: Write Combining (Write Coalescing) on memory mapped I/O on IA64. Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org David Mosberger wrote: > > >>>>> On Sat, 25 Aug 2001 16:40:24 +0200, Steffen Persvold said: > > Steffen> Just a repost since I didn't get any feedback. I've also > Steffen> copied some auhtors I found in asm/io.h. I appologize for > Steffen> any inconvenience, but this issue is quite important to us. > > I didn't see anything fundamentally wrong with what you're trying to > do, but I haven't looked at the code. Some debugging may be called > for. > Do you think it's easier to set up a region which is mapped all the time, so that ioremap_nocache() uses the already defined region 6 for uncached accesses and ioremap() uses this new region with "Write Coalescing" enabled ? How should I proceed to introduce such a region ? Regards, -- Steffen Persvold | Scali Computer AS | Try out the world's best mailto:sp@scali.no | http://www.scali.com | performing MPI implementation: Tel: (+47) 2262 8950 | Olaf Helsets vei 6 | - ScaMPI 1.12.2 - Fax: (+47) 2262 8951 | N0621 Oslo, NORWAY | >310MBytes/s and <4uS latency