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 B7CDBC61DA4 for ; Thu, 23 Feb 2023 00:33:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232903AbjBWAdW (ORCPT ); Wed, 22 Feb 2023 19:33:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbjBWAdT (ORCPT ); Wed, 22 Feb 2023 19:33:19 -0500 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CE9383C5; Wed, 22 Feb 2023 16:33:18 -0800 (PST) Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31N0Of9U001037; Thu, 23 Feb 2023 00:33:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2022-7-12; bh=QFCsR5onlgCwc3c942GZhCrGtr2gtf/luBe3NddelDs=; b=nqPLnmEICg9DHLdeVHufPNzax6szYovKR0IrosQL/yA9Z6cE3oitOhL2mI0mJ8g0ZOtO zjxCFUdpabqq4c9W4bkjIIRkJEQvU2dcvUXfGrBBLhAjf6Po8F6OwKnJa9aATZOH2Q86 hF5V9P+1GGM9rol//07HFNIlXecHBSpBz2Z9DJ9Y7azawj386/7a5B8ka6wSG7xnaIu1 SWmsM+E5OLO1DeOQ5WMLsow+Vgq6YY1lOjjbZP2NyBJeVOJwI5I/xRP9hljv7m13xldO lkni9gu6UudXpzcbE831qPRlO91AAvKqn+8mrmzRTi5jbbOYiJGNTudhHhOKCyu5U1+w Vg== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3ntpja99bg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Feb 2023 00:33:15 +0000 Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 31MNcV1T006773; Thu, 23 Feb 2023 00:33:14 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3ntn4dvreu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Feb 2023 00:33:13 +0000 Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 31N0XDXV013669; Thu, 23 Feb 2023 00:33:13 GMT Received: from ca-qasparc-x86-2.us.oracle.com (ca-qasparc-x86-2.us.oracle.com [10.147.24.103]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3ntn4dvreh-1; Thu, 23 Feb 2023 00:33:13 +0000 From: Anthony Yznaga To: daniel.m.jordan@oracle.com, steffen.klassert@secunet.com Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] padata: use alignment when calculating the number of worker threads Date: Wed, 22 Feb 2023 16:33:12 -0800 Message-Id: <1677112392-17332-1-git-send-email-anthony.yznaga@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-22_12,2023-02-22_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302230002 X-Proofpoint-ORIG-GUID: TLVlqTZedShvIlPqMn2a0gER4aEQT1es X-Proofpoint-GUID: TLVlqTZedShvIlPqMn2a0gER4aEQT1es Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For multithreaded jobs the computed chunk size is rounded up by the caller-specified alignment. However, the number of worker threads to use is computed using the minimum chunk size without taking alignment into account. A sufficiently large alignment value can result in too many worker threads being allocated for the job. Signed-off-by: Anthony Yznaga --- kernel/padata.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/padata.c b/kernel/padata.c index e007b8a4b738..4abc536ecdb1 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -491,7 +491,7 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) return; /* Ensure at least one thread when size < min_chunk. */ - nworks = max(job->size / job->min_chunk, 1ul); + nworks = max(job->size / max(job->min_chunk, job->align), 1ul); nworks = min(nworks, job->max_threads); if (nworks == 1) { -- 1.8.3.1