From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <404DA290.5080500@jonmasters.org> Date: Tue, 09 Mar 2004 10:55:12 +0000 From: Jon Masters MIME-Version: 1.0 To: Fillod Stephane Cc: LinuxPPC Subject: Re: uncached user space mapping with mmap() ??? References: <2C1BAF8F8E1DD611862B0002A5D4C3FC02B6CFCA@renexch3.rennes.thmulti.com> In-Reply-To: <2C1BAF8F8E1DD611862B0002A5D4C3FC02B6CFCA@renexch3.rennes.thmulti.com> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Fillod Stephane wrote: > The bigger the mmap, the better, and the "lesser" entries in page table > there will be. That's not true though. I went along with the rest of your mail, but the above just does not make sense to me. Are you somehow assuming you can have variable page sizes or will necessarily be using BATs to map in large regions? If this is the case then do bear in mind the fixed 4K page size on most platforms and the fact that many architectures like 4xx do not have any BATs anyway. Cheers, Jon. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/