Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965039AbcKNWZr (ORCPT ); Mon, 14 Nov 2016 17:25:47 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:55724 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964933AbcKNWW0 (ORCPT ); Mon, 14 Nov 2016 17:22:26 -0500 From: Shaohua Li To: , CC: , , , Subject: [PATCH V4 11/15] blk-throttle: add interface to configure think time threshold Date: Mon, 14 Nov 2016 14:22:18 -0800 Message-ID: <52aae27038728bf0fd1b2b3b6536fcc28c9f2e6c.1479161136.git.shli@fb.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-14_13:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2630 Lines: 87 Add interface to configure the threshold Signed-off-by: Shaohua Li --- block/blk-sysfs.c | 7 +++++++ block/blk-throttle.c | 25 +++++++++++++++++++++++++ block/blk.h | 4 ++++ 3 files changed, 36 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 3e284e4..f15aeed 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -532,6 +532,12 @@ static struct queue_sysfs_entry throtl_slice_entry = { .show = blk_throtl_slice_show, .store = blk_throtl_slice_store, }; + +static struct queue_sysfs_entry throtl_idle_threshold_entry = { + .attr = {.name = "throttling_idle_threshold", .mode = S_IRUGO | S_IWUSR }, + .show = blk_throtl_idle_threshold_show, + .store = blk_throtl_idle_threshold_store, +}; #endif static struct attribute *default_attrs[] = { @@ -563,6 +569,7 @@ static struct attribute *default_attrs[] = { &queue_dax_entry.attr, #ifdef CONFIG_BLK_DEV_THROTTLING &throtl_slice_entry.attr, + &throtl_idle_threshold_entry.attr, #endif NULL, }; diff --git a/block/blk-throttle.c b/block/blk-throttle.c index cb5fd85..e403e88 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -2139,6 +2139,31 @@ ssize_t blk_throtl_slice_store(struct request_queue *q, return count; } +ssize_t blk_throtl_idle_threshold_show(struct request_queue *q, char *page) +{ + u64 threshold = q->td->idle_ttime_threshold; + + if (!q->td) + return -EINVAL; + do_div(threshold, 1000); + return sprintf(page, "%lluus\n", threshold); +} + +ssize_t blk_throtl_idle_threshold_store(struct request_queue *q, + const char *page, size_t count) +{ + unsigned long v; + + if (!q->td) + return -EINVAL; + if (kstrtoul(page, 10, &v)) + return -EINVAL; + if (v == 0) + return -EINVAL; + q->td->idle_ttime_threshold = v * 1000; + return count; +} + static int __init throtl_init(void) { kthrotld_workqueue = alloc_workqueue("kthrotld", WQ_MEM_RECLAIM, 0); diff --git a/block/blk.h b/block/blk.h index b433f35..2ebde12 100644 --- a/block/blk.h +++ b/block/blk.h @@ -292,6 +292,10 @@ extern void blk_throtl_exit(struct request_queue *q); extern ssize_t blk_throtl_slice_show(struct request_queue *q, char *page); extern ssize_t blk_throtl_slice_store(struct request_queue *q, const char *page, size_t count); +extern ssize_t blk_throtl_idle_threshold_show(struct request_queue *q, + char *page); +extern ssize_t blk_throtl_idle_threshold_store(struct request_queue *q, + const char *page, size_t count); extern void blk_throtl_bio_endio(struct bio *bio); #else /* CONFIG_BLK_DEV_THROTTLING */ static inline void blk_throtl_drain(struct request_queue *q) { } -- 2.9.3