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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4487C54E58 for ; Tue, 12 Mar 2024 17:06:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4786B8D0067; Tue, 12 Mar 2024 13:06:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 427C08D0017; Tue, 12 Mar 2024 13:06:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2F0308D0067; Tue, 12 Mar 2024 13:06:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 1C2838D0017 for ; Tue, 12 Mar 2024 13:06:10 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id DAE60C0B15 for ; Tue, 12 Mar 2024 17:06:09 +0000 (UTC) X-FDA: 81889014858.22.7728068 Received: from gentwo.org (gentwo.org [62.72.0.81]) by imf02.hostedemail.com (Postfix) with ESMTP id 4051180005 for ; Tue, 12 Mar 2024 17:06:08 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=linux.com (policy=none); spf=softfail (imf02.hostedemail.com: 62.72.0.81 is neither permitted nor denied by domain of cl@linux.com) smtp.mailfrom=cl@linux.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1710263168; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=09dvwzx4f2MVkzw89jZwX+SMD+Jv+bASzvn2Gq6e8xU=; b=HPrrdr1ZcUG/tehFpvpsn3Ea9ji1UVClYpK13LDmN48H9FsVcNQzP2d3iUsQ8CTDG6ax+6 KI0gAh28hLBZNWHxhZFpBH5NkEGtRDoM0jDLkZQU9bHMmGAJRslpzmXHJGh+pQkz81sxSL x128QCUI5zeFWEbi3SSAPkXA3gB0vL0= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=linux.com (policy=none); spf=softfail (imf02.hostedemail.com: 62.72.0.81 is neither permitted nor denied by domain of cl@linux.com) smtp.mailfrom=cl@linux.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1710263168; a=rsa-sha256; cv=none; b=0BBZD0jXCL6rEr12nfiJfaB1pr4uyYNmO+ivZ3ura1nh8exRTrzZIJqg94g5rc1S7MuUV3 0cVOYhKKB5UcWDr+Z2/Qk4isXSu10AZP3uaD8ozMMN7yWFlJ3IvmKZ3vuiSyOvMNoKNP/s o7iHUzcC4pJGXTnuN5WHfKBgyPYHVCs= Received: by gentwo.org (Postfix, from userid 1003) id E34C540AB1; Tue, 12 Mar 2024 10:06:06 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id E264E40A97; Tue, 12 Mar 2024 10:06:06 -0700 (PDT) Date: Tue, 12 Mar 2024 10:06:06 -0700 (PDT) From: "Christoph Lameter (Ampere)" To: Catalin Marinas cc: Marek Szyprowski , Mark Rutland , "linux-pm@vger.kernel.org" , "Rafael J. Wysocki" , Viresh Kumar , Will Deacon , Jonathan.Cameron@huawei.com, Matteo.Carlini@arm.com, Valentin.Schneider@arm.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, Eric Mackay , dave.kleikamp@oracle.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux@armlinux.org.uk, robin.murphy@arm.com, vanshikonda@os.amperecomputing.com, yang@os.amperecomputing.com, Nishanth Menon , Stephen Boyd Subject: Re: [PATCH v3] ARM64: Dynamically allocate cpumasks and increase supported CPUs to 512 In-Reply-To: <9352f410-9dad-ac89-181a-b3cfc86176b8@linux.com> Message-ID: References: <37099a57-b655-3b3a-56d0-5f7fbd49d7db@gentwo.org> <9352f410-9dad-ac89-181a-b3cfc86176b8@linux.com> MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII X-Rspamd-Queue-Id: 4051180005 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: zbickhjkess4m5pp41hqd5tbf8jkxxrj X-HE-Tag: 1710263168-106555 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 11 Mar 2024, Christoph Lameter (Ampere) wrote: > This could be an issue in the ARM64 arch code itself where there maybe an > assumption elsewhere that a cpumask can always store up to NR_CPU cpus and > not only nr_cpu_ids as OFFSTACK does. > > How can I exercise the opp driver in order to recreate the problem? > > I assume the opp driver is ARM specific? x86 defaults to OFFSTACK so if there > is an issue with OFFSTACK in opp then it should fail with kernel default > configuration on that platform. I checked the ARM64 arch sources use of NR_CPUS and its all fine. Also verified in my testing logs that CONFIG_PM_OPP was set in all tests. No warnings in the kernel log during those tests. How to reproduce this?