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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 73784C67861 for ; Fri, 5 Apr 2024 09:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:CC:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hHCJaq+bVDEjTn1H3cKWV2OkP2tiqGhRXzrolA9LzjQ=; b=nhety3z+p/LtaU uh5qKxPn7Q/FwjfFtXCvzufYt3crdL3ZFkTWZIfPOsOYg31WPKE9/95dYzRLlfmPgcbh7vnSylPb8 FOtLw6hTh0qKNZI6P8hZzHMPbNALRmDyRh51SAB71GqS66yWcHHRN05015ZmiDRYE7C7s8peue/dY 6G/M1KL/6Gl6Pt0MB5t7U2qNwy+jK+LRVQmhYznQxazxUjMSYP1ocHJz5MgMsX3Kc1JsSonypHc6z JKSZ/YO48HV6222VU6QEzxpex9KubncEjUVS7WI3ofdgP4RSWqzt3YMJhP37nfcyjGybZEmOw7fz/ j2cpzNCiqqMol2x7MBdg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rsgHI-00000006HmI-0f88; Fri, 05 Apr 2024 09:54:32 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rsgHF-00000006Hkf-0eis for linux-arm-kernel@lists.infradead.org; Fri, 05 Apr 2024 09:54:30 +0000 Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4V9v1T1LWRz6J6d5; Fri, 5 Apr 2024 17:53:01 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 81C15141546; Fri, 5 Apr 2024 17:54:23 +0800 (CST) Received: from localhost (10.202.227.76) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Fri, 5 Apr 2024 10:54:23 +0100 Date: Fri, 5 Apr 2024 10:54:22 +0100 From: Jonathan Cameron To: Dawei Li CC: , , , , , , , , , , , Subject: Re: [PATCH v3 07/10] perf/hisi_pcie: Avoid placing cpumask on the stack Message-ID: <20240405105422.00006352@Huawei.com> In-Reply-To: <20240403155950.2068109-8-dawei.li@shingroup.cn> References: <20240403155950.2068109-1-dawei.li@shingroup.cn> <20240403155950.2068109-8-dawei.li@shingroup.cn> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 X-Originating-IP: [10.202.227.76] X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240405_025429_531225_CCF1C687 X-CRM114-Status: UNSURE ( 6.40 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 3 Apr 2024 23:59:47 +0800 Dawei Li wrote: > In general it's preferable to avoid placing cpumasks on the stack, as > for large values of NR_CPUS these can consume significant amounts of > stack space and make stack overflows more likely. > > Use cpumask_any_and_but() to avoid the need for a temporary cpumask on > the stack. > > Suggested-by: Mark Rutland > Reviewed-by: Mark Rutland > Signed-off-by: Dawei Li Acked-by: Jonathan Cameron _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel