From: "Rohit Sharma" Subject: Request queues and bio structures Date: Thu, 11 Sep 2008 00:19:16 +0530 Message-ID: <2d08ef090809101149o3c8365b5x74455bb56a9e89b8@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: ext4 Return-path: Received: from wx-out-0506.google.com ([66.249.82.230]:31036 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751126AbYIJStS (ORCPT ); Wed, 10 Sep 2008 14:49:18 -0400 Received: by wx-out-0506.google.com with SMTP id h27so938773wxd.4 for ; Wed, 10 Sep 2008 11:49:16 -0700 (PDT) Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: I was going through Block device Drivers. few things are not clear. How requests for reading blocks from device is processed? what is the role of mapping layer? what are the entries in device mapper.? How request queues and bio structures work?