From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: [PATCH 0/5] ide-tape: refit tape data buffer bits/kill pipelining Date: Sat, 29 Mar 2008 18:46:04 +0100 Message-ID: <1206812769-10065-1-git-send-email-petkovbb@gmail.com> Return-path: Received: from py-out-1112.google.com ([64.233.166.176]:23055 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752965AbYC2Rp7 (ORCPT ); Sat, 29 Mar 2008 13:45:59 -0400 Received: by py-out-1112.google.com with SMTP id u52so1147943pyb.10 for ; Sat, 29 Mar 2008 10:45:59 -0700 (PDT) Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: bzolnier@gmail.com Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Borislav Petkov Hi Bart, This patchset refits the tape->merge_stage pipeline stage into tape->bh, a singly linked list of idetape_bh's, each of which is a tag attached to one or more pages serving as a buffer for data requests. The original functionality is kept wrt collecting data in the buffer and flushing it to the hardware when full. Currently, the data rq's are serialized on the block interface and it would probably be better to return immediately after issuing it over ide_do_drive_cmd() in order to increase throughput, proper locking and testing implied of course. drivers/ide/ide-tape.c | 393 +++++++++++++++++------------------------------- 1 files changed, 135 insertions(+), 258 deletions(-)