From patchwork Mon Oct 3 21:20:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaohua Li X-Patchwork-Id: 9360971 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BC9D8601C0 for ; Mon, 3 Oct 2016 21:22:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B228E28842 for ; Mon, 3 Oct 2016 21:22:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6CB128A6E; Mon, 3 Oct 2016 21:22:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E78828842 for ; Mon, 3 Oct 2016 21:22:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753437AbcJCVWu (ORCPT ); Mon, 3 Oct 2016 17:22:50 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:43226 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752074AbcJCVVT (ORCPT ); Mon, 3 Oct 2016 17:21:19 -0400 Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.16.0.17/8.16.0.17) with SMTP id u93LJ4Nt027461 for ; Mon, 3 Oct 2016 14:21:18 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=/xhM2sLGsDmMR9PKw8PHAytnWJ1ugmLNkPprCR+Ck8s=; b=RJEsjAWxScONaBApB9Bfx0EBEi/uydZBLK3fm7UA5cIvi9ZS4yICUGneelDOGHqJTnsm HhZ+2JP9alt3UrplSYo7xUQdF4zCtgNOkcMVnyDKZ7k3NU8Efu3jYJOY5Hh1yCkbXiK6 UfmxB702nwXkNOmI2B8hnWDspeI2t961i5k= Received: from mail.thefacebook.com ([199.201.64.23]) by m0001303.ppops.net with ESMTP id 25t8tbef7s-12 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Mon, 03 Oct 2016 14:21:18 -0700 Received: from mx-out.facebook.com (192.168.52.123) by PRN-CHUB03.TheFacebook.com (192.168.16.13) with Microsoft SMTP Server (TLS) id 14.3.294.0; Mon, 3 Oct 2016 14:20:33 -0700 Received: from facebook.com (2401:db00:21:603d:face:0:19:0) by mx-out.facebook.com (10.223.100.97) with ESMTP id 3792d2b089af11e69e6224be0593f280-6eae7a50 for ; Mon, 03 Oct 2016 14:20:32 -0700 Received: by devbig638.prn2.facebook.com (Postfix, from userid 11222) id 3C8C042C1164; Mon, 3 Oct 2016 14:20:31 -0700 (PDT) From: Shaohua Li To: , CC: , , , , Subject: [PATCH v3 03/11] block-throttle: configure bps/iops limit for cgroup in high limit Date: Mon, 3 Oct 2016 14:20:22 -0700 Message-ID: X-Mailer: git-send-email 2.9.3 In-Reply-To: References: X-FB-Internal: Safe MIME-Version: 1.0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-10-03_12:, , signatures=0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 59d4b4c..e2b3704 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; } /**