From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 702F6C4321E for ; Mon, 14 Feb 2022 17:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357315AbiBNRpC (ORCPT ); Mon, 14 Feb 2022 12:45:02 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:35030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357241AbiBNRon (ORCPT ); Mon, 14 Feb 2022 12:44:43 -0500 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17AE16548F for ; Mon, 14 Feb 2022 09:44:36 -0800 (PST) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 21E6TxU1007087 for ; Mon, 14 Feb 2022 09:44:35 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=PrMhbqwOga++xb/Ni5mVt/2MYejdr64cMoOG2i2n2Bc=; b=f3065dX9Wvo7rDZcaMXO+dR/bs3k5q3Fb+DEHplZ1K2UGXhXY6/soCbrFFnvgxqjhsx8 FKmu0flFTG38bXys011JtFNREu2y6fTTr7NGJqBb/pY9b6NtX2dvm3v/FP5FKV6XstRC DD37MSHLvoJb6u73nMWXOtTQ/m+D6mbDG4k= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3e7hv53hx9-14 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 14 Feb 2022 09:44:35 -0800 Received: from twshared19733.18.frc3.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:11d::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Mon, 14 Feb 2022 09:44:34 -0800 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id CCA3CABBD109; Mon, 14 Feb 2022 09:44:09 -0800 (PST) From: Stefan Roesch To: , , , CC: Subject: [PATCH v1 11/14] sched: add new fields to task_struct Date: Mon, 14 Feb 2022 09:44:00 -0800 Message-ID: <20220214174403.4147994-12-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220214174403.4147994-1-shr@fb.com> References: <20220214174403.4147994-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: nhddfg-X-GKttiI-wjJwQORBidhsHXKf X-Proofpoint-GUID: nhddfg-X-GKttiI-wjJwQORBidhsHXKf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-14_07,2022-02-14_03,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 mlxscore=0 mlxlogscore=999 priorityscore=1501 malwarescore=0 phishscore=0 clxscore=1015 adultscore=0 impostorscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202140105 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Add two new fields to the task_struct to support async write throttling. - One field to store how long writes are throttled: bdp_pause - The other field to store the number of dirtied pages: bdp_nr_dirtied_pause Signed-off-by: Stefan Roesch --- include/linux/sched.h | 3 +++ kernel/fork.c | 1 + 2 files changed, 4 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index 75ba8aa60248..97146b7539c5 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1324,6 +1324,9 @@ struct task_struct { /* Start of a write-and-pause period: */ unsigned long dirty_paused_when; =20 + unsigned long bdp_pause; + int bdp_nr_dirtied_pause; + #ifdef CONFIG_LATENCYTOP int latency_record_count; struct latency_record latency_record[LT_SAVECOUNT]; diff --git a/kernel/fork.c b/kernel/fork.c index d75a528f7b21..d34c9c00baea 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2246,6 +2246,7 @@ static __latent_entropy struct task_struct *copy_pr= ocess( p->nr_dirtied =3D 0; p->nr_dirtied_pause =3D 128 >> (PAGE_SHIFT - 10); p->dirty_paused_when =3D 0; + p->bdp_nr_dirtied_pause =3D -1; =20 p->pdeath_signal =3D 0; INIT_LIST_HEAD(&p->thread_group); --=20 2.30.2