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 3E712CD128A for ; Mon, 8 Apr 2024 00:28:56 +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:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3nFUfcUBv9Sv30g03MVn4SxjxpC0ND4yYiOCmE2Gtp0=; b=YQLyuiogNctxw0 okNFiPha9nyRKvw9pvSd7Emmuv3MdLefJPspuWuVYRrB9zZfO6fUp2udSvPAX55I5+oY8wy13jqex MwPp9OD/h9zuN64rQr5nUTLyog9NTdWZ6S7NYRUlJiF5HDKN/MZRAAFsHoph8I6lkpxy+gIR8Xh+6 ny36uMf9AM3vVxFYOgHQWdQwq4G4GvQo/5ENGUpuFvoGn1PgMJlELddgKaXn/qeMwbWpMl0jDLRDy g/9kXW6/iPnYO5dhq4mLge2p7Cc/w1F5RUltxp/05FoeeZsoobMAlg5wrF/cEXnDETK6Lmfi44q32 dY2QfzwGcnD7H6h+sOSg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rtcsN-0000000DoLv-2gTM; Mon, 08 Apr 2024 00:28:43 +0000 Received: from out30-98.freemail.mail.aliyun.com ([115.124.30.98]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rtcsK-0000000DoLM-0SlN for linux-arm-kernel@lists.infradead.org; Mon, 08 Apr 2024 00:28:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1712536112; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=Jn1TtkykRBXTanm0VcQoas0+0sEdF3G3DjSyEmfOcyw=; b=DDXSdAPJ79jhkUt1HrV5DqG66SW6BYQXuz13Di0E+nVfQMKA3UrQZSgOi0WKftCd8jPnGtZIWohD3UG8PPzH4rTKWUu9R+24J9uafMwXCrZWfmX3BqB0vvWJrA53joCmnwzt9+VC0LDvbPZgUrcZnNEueME+eSg2U7J44M/XL8M= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=xueshuai@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0W41MQQQ_1712536110; Received: from 30.97.56.50(mailfrom:xueshuai@linux.alibaba.com fp:SMTPD_---0W41MQQQ_1712536110) by smtp.aliyun-inc.com; Mon, 08 Apr 2024 08:28:31 +0800 Message-ID: <8490280b-2ae2-4a0f-a13b-c2afc9e2b2ed@linux.alibaba.com> Date: Mon, 8 Apr 2024 08:28:29 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 02/10] perf/alibaba_uncore_drw: Avoid placing cpumask on the stack To: Dawei Li , will@kernel.org, mark.rutland@arm.com, yury.norov@gmail.com, linux@rasmusvillemoes.dk Cc: renyu.zj@linux.alibaba.com, yangyicong@hisilicon.com, jonathan.cameron@huawei.com, andersson@kernel.org, konrad.dybcio@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20240403155950.2068109-1-dawei.li@shingroup.cn> <20240403155950.2068109-3-dawei.li@shingroup.cn> Content-Language: en-US From: Shuai Xue In-Reply-To: <20240403155950.2068109-3-dawei.li@shingroup.cn> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240407_172840_509584_6CBE5FE8 X-CRM114-Status: UNSURE ( 5.18 ) 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 2024/4/3 23:59, 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 > --- Reviewed-by: Shuai Xue _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel