From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from rcsinet10.oracle.com ([148.87.113.121]:39748 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932386Ab1AKRgJ (ORCPT >); Tue, 11 Jan 2011 12:36:09 -0500 Date: Tue, 11 Jan 2011 12:35:09 -0500 From: Konrad Rzeszutek Wilk To: Jonghun Han Cc: "'InKi Dae'" , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "'linux-fbdev'" , kyungmin.park@samsung.com Subject: Re: Memory sharing issue by application on V4L2 based device driver with system mmu. Message-ID: <20110111173509.GB14017@dumpdata.com> References: <4D25BC22.6080803@samsung.com> <002201cbadfd$6d59e490$480dadb0$%han@samsung.com> <003201cbae19$bda3dfc0$38eb9f40$%han@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <003201cbae19$bda3dfc0$38eb9f40$%han@samsung.com> List-ID: Sender: .. snip.. > But 64KB or 1MB physically contiguous memory is better than 4KB page in the > point of performance. Could you explain that in more details please? I presume you are talking about a CPU that has a MMU unit, right?