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dkim=none (message not signed) header.d=none;linaro.org; dmarc=none action=none header.from=nokia.com; Received: from AM0PR07MB4531.eurprd07.prod.outlook.com (2603:10a6:208:6e::15) by AM0PR07MB5556.eurprd07.prod.outlook.com (2603:10a6:208:104::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3933.14; Wed, 10 Mar 2021 17:17:56 +0000 Received: from AM0PR07MB4531.eurprd07.prod.outlook.com ([fe80::7c49:66bd:9795:1a3f]) by AM0PR07MB4531.eurprd07.prod.outlook.com ([fe80::7c49:66bd:9795:1a3f%3]) with mapi id 15.20.3912.027; Wed, 10 Mar 2021 17:17:56 +0000 Subject: Re: [PATCH v7 2/2] ARM: ftrace: Add MODULE_PLTS support To: Florian Fainelli , Qais Yousef Cc: Steven Rostedt , Ingo Molnar , Russell King , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Ard Biesheuvel References: <20210127110944.41813-1-alexander.sverdlin@nokia.com> <20210127110944.41813-3-alexander.sverdlin@nokia.com> <20210307172650.uztx3sk5abybbp3f@e107158-lin.cambridge.arm.com> <0c122390-6e76-f773-86e9-8c085f4384f2@nokia.com> <20210309174201.n53za7mw33dqyleh@e107158-lin.cambridge.arm.com> <3eecf51d-b189-9e8b-f19d-a49d0764aae5@nokia.com> <05608bc8-f44d-5f91-15ab-af00c59b53e6@gmail.com> From: Alexander Sverdlin Message-ID: Date: Wed, 10 Mar 2021 18:17:54 +0100 User-Agent: Mozilla/5.0 (X11; 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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 Hi! On 10/03/2021 17:14, Florian Fainelli wrote: >>>>> I tried on 5.12-rc2 and 5.11 but couldn't reproduce the problem using your >>> I still can't reproduce on 5.12-rc2. >>> >>> I do have CONFIG_ARM_MODULE_PLTS=y. Do you need to do something else after >>> loading the module? I tried starting ftrace, but maybe there's a particular >>> combination required? >> You need to load a BIG module, so big that it has no place in the modules area >> any more and goes to vmalloc area. > You absolutely need a very big module maybe more than one. When I tested > this, I could use the two proprietary modules (*sigh*) that I needed to > exercise against and loading one but not the other was not enough to > make the second module loading spill into vmalloc space. Here is what I use instead of these real world "proprietary" modules (which of course were the real trigger for the patch): https://www.spinics.net/lists/arm-kernel/msg878599.html -- Best regards, Alexander Sverdlin. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel