From patchwork Wed May 11 00:16:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaohua Li X-Patchwork-Id: 9064301 Return-Path: X-Original-To: patchwork-linux-block@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 696A7BF29F for ; Wed, 11 May 2016 00:19:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 69A4620172 for ; Wed, 11 May 2016 00:19:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E3D120160 for ; Wed, 11 May 2016 00:18:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753350AbcEKASo (ORCPT ); Tue, 10 May 2016 20:18:44 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:36335 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752803AbcEKAQq (ORCPT ); Tue, 10 May 2016 20:16:46 -0400 Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.16.0.11/8.16.0.11) with SMTP id u4B0FgWF017994 for ; Tue, 10 May 2016 17:16:45 -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=vRaH8RxRfDf/raujAnRTbexRSrShy1ihfj0jFS2lkG0=; b=ZI8fTGs1sC3T62zXTH5NQ8ed8syFGlYaNKNtg4U2tnJcqEdvQ2ADz85R7p832+FzFfch adILfv/bd+MwT+svEFYPZguKs12KjBkLcLSE9Mr9KQT1Ri7HC/iJmhBVPoMBQGM97bnS EvQuT8bjwYbsWG4PdaiyCuVygIxIkFSnl+8= Received: from mail.thefacebook.com ([199.201.64.23]) by m0089730.ppops.net with ESMTP id 22ur09gj36-2 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 10 May 2016 17:16:45 -0700 Received: from mx-out.facebook.com (192.168.52.123) by PRN-CHUB09.TheFacebook.com (192.168.16.19) with Microsoft SMTP Server (TLS) id 14.3.248.2; Tue, 10 May 2016 17:16:44 -0700 Received: from facebook.com (2401:db00:11:d0a2:face:0:39:0) by mx-out.facebook.com (10.212.236.87) with ESMTP id a42b830a170d11e686830002c9521c9e-7ddfcc50 for ; Tue, 10 May 2016 17:16:44 -0700 Received: by devbig084.prn1.facebook.com (Postfix, from userid 11222) id 09FA54B0178F; Tue, 10 May 2016 17:16:41 -0700 (PDT) From: Shaohua Li To: , CC: , , , , Subject: [PATCH 07/10] block-throttle: add .high interface Date: Tue, 10 May 2016 17:16:37 -0700 Message-ID: <9e2fe776af3949942833f0040fc19e5797b5fc9c.1462923578.git.shli@fb.com> X-Mailer: git-send-email 2.8.0.rc2 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=2016-05-10_13:, , signatures=0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Spam-Status: No, score=-8.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add high limit for cgroup and corresponding cgroup interface. Signed-off-by: Shaohua Li --- block/blk-throttle.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 69 insertions(+), 5 deletions(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index a462e2f..5736d1b 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -87,8 +87,9 @@ enum tg_state_flags { enum { LIMIT_LOW = 0, - LIMIT_MAX = 1, - LIMIT_CNT = 2, + LIMIT_HIGH = 1, + LIMIT_MAX = 2, + LIMIT_CNT = 3, }; struct throtl_grp { @@ -240,6 +241,8 @@ static uint64_t tg_bps_limit(struct throtl_grp *tg, int rw) /* assign a small default */ return 64 * 1024; } + if (ret == -1 && tg->td->limit_index == LIMIT_HIGH) + return tg->bps[rw][LIMIT_MAX]; return ret; } @@ -258,6 +261,8 @@ static unsigned int tg_iops_limit(struct throtl_grp *tg, int rw) /* assign a small default */ return 16; } + if (ret == -1 && tg->td->limit_index == LIMIT_HIGH) + return tg->iops[rw][LIMIT_MAX]; return ret; } @@ -399,7 +404,7 @@ static struct blkg_policy_data *throtl_pd_alloc(gfp_t gfp, int node) RB_CLEAR_NODE(&tg->rb_node); for (rw = READ; rw <= WRITE; rw++) { - for (index = LIMIT_MAX; index < LIMIT_CNT; index++) { + for (index = LIMIT_HIGH; index < LIMIT_CNT; index++) { tg->bps[rw][index] = -1; tg->iops[rw][index] = -1; } @@ -466,6 +471,7 @@ static void blk_throtl_update_valid_limit(struct throtl_data *td) struct cgroup_subsys_state *pos_css; struct blkcg_gq *blkg; bool low_valid = false; + bool high_valid = false; blkg_for_each_descendant_post(blkg, pos_css, td->queue->root_blkg) { struct throtl_grp *tg = blkg_to_tg(blkg); @@ -475,12 +481,21 @@ static void blk_throtl_update_valid_limit(struct throtl_data *td) tg->iops[READ][LIMIT_LOW] || tg->iops[WRITE][LIMIT_LOW]) low_valid = true; + if (tg->bps[READ][LIMIT_HIGH] != -1 || + tg->bps[WRITE][LIMIT_HIGH] != -1 || + tg->iops[READ][LIMIT_HIGH] != -1 || + tg->iops[WRITE][LIMIT_HIGH] != -1) + high_valid = true; } if (low_valid) td->limit_valid[LIMIT_LOW] = true; else td->limit_valid[LIMIT_LOW] = false; + if (high_valid) + td->limit_valid[LIMIT_HIGH] = true; + else + td->limit_valid[LIMIT_HIGH] = false; } static void throtl_upgrade_state(struct throtl_data *td); @@ -492,6 +507,10 @@ static void throtl_pd_offline(struct blkg_policy_data *pd) tg->bps[WRITE][LIMIT_LOW] = 0; tg->iops[READ][LIMIT_LOW] = 0; tg->iops[WRITE][LIMIT_LOW] = 0; + tg->bps[READ][LIMIT_HIGH] = -1; + tg->bps[WRITE][LIMIT_HIGH] = -1; + tg->iops[READ][LIMIT_HIGH] = -1; + tg->iops[WRITE][LIMIT_HIGH] = -1; blk_throtl_update_valid_limit(tg->td); @@ -1476,7 +1495,15 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of, if (v[0] < tg->bps[READ][LIMIT_LOW] || v[1] < tg->bps[WRITE][LIMIT_LOW] || v[2] < tg->iops[READ][LIMIT_LOW] || - v[3] < tg->iops[WRITE][LIMIT_LOW]) { + v[3] < tg->iops[WRITE][LIMIT_LOW] || + (tg->bps[READ][LIMIT_HIGH] != -1 && + v[0] < tg->bps[READ][LIMIT_HIGH]) || + (tg->bps[WRITE][LIMIT_HIGH] != -1 && + v[1] < tg->bps[WRITE][LIMIT_HIGH]) || + (tg->iops[READ][LIMIT_HIGH] != -1 && + v[2] < tg->iops[READ][LIMIT_HIGH]) || + (tg->iops[WRITE][LIMIT_HIGH] != -1 && + v[3] < tg->iops[WRITE][LIMIT_HIGH])) { ret = -EINVAL; goto out_finish; } @@ -1484,7 +1511,27 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of, if (v[0] > tg->bps[READ][LIMIT_MAX] || v[1] > tg->bps[WRITE][LIMIT_MAX] || v[2] > tg->iops[READ][LIMIT_MAX] || - v[3] > tg->iops[WRITE][LIMIT_MAX]) { + v[3] > tg->iops[WRITE][LIMIT_MAX] || + (tg->bps[READ][LIMIT_HIGH] != -1 && + v[0] > tg->bps[READ][LIMIT_HIGH]) || + (tg->bps[WRITE][LIMIT_HIGH] != -1 && + v[1] > tg->bps[WRITE][LIMIT_HIGH]) || + (tg->iops[READ][LIMIT_HIGH] != -1 && + v[2] > tg->iops[READ][LIMIT_HIGH]) || + (tg->iops[WRITE][LIMIT_HIGH] != -1 && + v[3] > tg->iops[WRITE][LIMIT_HIGH])) { + ret = -EINVAL; + goto out_finish; + } + } else if (index == LIMIT_HIGH) { + if ((v[0] != -1 && (v[0] < tg->bps[READ][LIMIT_LOW] || + v[0] > tg->bps[READ][LIMIT_MAX])) || + (v[1] != -1 && (v[1] < tg->bps[WRITE][LIMIT_LOW] || + v[1] > tg->bps[WRITE][LIMIT_MAX])) || + (v[2] != -1 && (v[2] < tg->iops[READ][LIMIT_LOW] || + v[2] > tg->iops[READ][LIMIT_MAX])) || + (v[3] != -1 && (v[3] < tg->iops[WRITE][LIMIT_LOW] || + v[3] > tg->iops[WRITE][LIMIT_MAX]))) { ret = -EINVAL; goto out_finish; } @@ -1499,6 +1546,15 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of, if (tg->td->limit_valid[LIMIT_LOW]) tg->td->limit_index = LIMIT_LOW; } + if (index == LIMIT_HIGH) { + blk_throtl_update_valid_limit(tg->td); + if (tg->td->limit_valid[LIMIT_HIGH] && + tg->td->limit_index == LIMIT_MAX) + tg->td->limit_index = LIMIT_HIGH; + } + if (index == LIMIT_MAX && tg->td->limit_index == LIMIT_MAX && + tg->td->limit_valid[LIMIT_HIGH]) + tg->td->limit_index = LIMIT_HIGH; tg_conf_updated(tg); ret = 0; out_finish: @@ -1515,6 +1571,13 @@ static struct cftype throtl_files[] = { .private = LIMIT_LOW, }, { + .name = "high", + .flags = CFTYPE_NOT_ON_ROOT, + .seq_show = tg_print_limit, + .write = tg_set_limit, + .private = LIMIT_HIGH, + }, + { .name = "max", .flags = CFTYPE_NOT_ON_ROOT, .seq_show = tg_print_limit, @@ -1988,6 +2051,7 @@ int blk_throtl_init(struct request_queue *q) td->queue = q; td->limit_valid[LIMIT_LOW] = false; + td->limit_valid[LIMIT_HIGH] = false; td->limit_valid[LIMIT_MAX] = true; td->limit_index = LIMIT_MAX; td->low_upgrade_time = jiffies;