From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:57811 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965031AbcKNWWZ (ORCPT ); Mon, 14 Nov 2016 17:22:25 -0500 Received: from pps.filterd (m0001255.ppops.net [127.0.0.1]) by mx0b-00082601.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id uAEMLP3d016476 for ; Mon, 14 Nov 2016 14:22:24 -0800 Received: from mail.thefacebook.com ([199.201.64.23]) by mx0b-00082601.pphosted.com with ESMTP id 26p2f2t49u-2 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Mon, 14 Nov 2016 14:22:24 -0800 Received: from facebook.com (2401:db00:21:603d:face:0:19:0) by mx-out.facebook.com (10.223.100.99) with ESMTP id d06a7194aab811e6985324be05956610-81dfda50 for ; Mon, 14 Nov 2016 14:22:23 -0800 From: Shaohua Li To: , CC: , , , Subject: [PATCH V4 03/15] blk-throttle: configure bps/iops limit for cgroup in high limit Date: Mon, 14 Nov 2016 14:22:10 -0800 Message-ID: <7a4f1b1b0f67bb02d0caadae808c1a89413c202d.1479161136.git.shli@fb.com> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org each queue will have a state machine. Initially queue is in LIMIT_HIGH state, which means all cgroups will be throttled according to their high limit. After all cgroups with high limit cross the limit, the queue state gets upgraded to LIMIT_MAX state. cgroups without high limit will use max limit for their high limit. Signed-off-by: Shaohua Li --- block/blk-throttle.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index a564215..ec53671 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -208,12 +208,29 @@ static struct throtl_data *sq_to_td(struct throtl_service_queue *sq) static uint64_t tg_bps_limit(struct throtl_grp *tg, int rw) { - return tg->bps[rw][tg->td->limit_index]; + struct blkcg_gq *blkg = tg_to_blkg(tg); + uint64_t ret; + + if (cgroup_subsys_on_dfl(io_cgrp_subsys) && !blkg->parent) + return -1; + ret = tg->bps[rw][tg->td->limit_index]; + if (ret == -1 && tg->td->limit_index == LIMIT_HIGH) + return tg->bps[rw][LIMIT_MAX]; + + return ret; } static unsigned int tg_iops_limit(struct throtl_grp *tg, int rw) { - return tg->iops[rw][tg->td->limit_index]; + struct blkcg_gq *blkg = tg_to_blkg(tg); + unsigned int ret; + + if (cgroup_subsys_on_dfl(io_cgrp_subsys) && !blkg->parent) + return -1; + ret = tg->iops[rw][tg->td->limit_index]; + if (ret == -1 && tg->td->limit_index == LIMIT_HIGH) + return tg->iops[rw][LIMIT_MAX]; + return ret; } /** -- 2.9.3