From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755447AbXEIIEc (ORCPT ); Wed, 9 May 2007 04:04:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754876AbXEIH7w (ORCPT ); Wed, 9 May 2007 03:59:52 -0400 Received: from brick.kernel.dk ([80.160.20.94]:20897 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753881AbXEIH7q (ORCPT ); Wed, 9 May 2007 03:59:46 -0400 From: Jens Axboe To: linux-kernel@vger.kernel.org Cc: Jens Axboe Subject: [PATCH 10/10] ll_rw_blk: temporarily enable max_segments tweaking Date: Wed, 9 May 2007 09:59:24 +0200 Message-Id: <117869756447-git-send-email-jens.axboe@oracle.com> X-Mailer: git-send-email 1.5.2.rc1 In-Reply-To: <11786975641643-git-send-email-jens.axboe@oracle.com> References: <11786975641643-git-send-email-jens.axboe@oracle.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Expose this setting for now, so that users can play with enabling large commands without defaulting it to on globally. Signed-off-by: Jens Axboe --- block/ll_rw_blk.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 0ad4c34..0adcbed 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -3931,7 +3931,22 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) return queue_var_show(max_hw_sectors_kb, (page)); } +static ssize_t queue_max_segments_show(struct request_queue *q, char *page) +{ + return queue_var_show(q->max_phys_segments, page); +} + +static ssize_t queue_max_segments_store(struct request_queue *q, const char *page, size_t count) +{ + unsigned long segments; + ssize_t ret = queue_var_store(&segments, page, count); + spin_lock_irq(q->queue_lock); + q->max_phys_segments = segments; + spin_unlock_irq(q->queue_lock); + + return ret; +} static struct queue_sysfs_entry queue_requests_entry = { .attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR }, .show = queue_requests_show, @@ -3955,6 +3970,12 @@ static struct queue_sysfs_entry queue_max_hw_sectors_entry = { .show = queue_max_hw_sectors_show, }; +static struct queue_sysfs_entry queue_max_segments_entry = { + .attr = {.name = "max_segments", .mode = S_IRUGO |S_IWUSR }, + .show = queue_max_segments_show, + .store = queue_max_segments_store, +}; + static struct queue_sysfs_entry queue_iosched_entry = { .attr = {.name = "scheduler", .mode = S_IRUGO | S_IWUSR }, .show = elv_iosched_show, @@ -3966,6 +3987,7 @@ static struct attribute *default_attrs[] = { &queue_ra_entry.attr, &queue_max_hw_sectors_entry.attr, &queue_max_sectors_entry.attr, + &queue_max_segments_entry.attr, &queue_iosched_entry.attr, NULL, }; -- 1.5.2.rc1