From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f45.google.com (mail-ej1-f45.google.com [209.85.218.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68788213E66 for ; Wed, 7 May 2025 10:27:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.45 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746613680; cv=none; b=QWyRDGPyAM/zNlvrbAYgHRNjo2jgu4lNNnORux5WECIUjZclI/8CfrkjcPpg/7bSFYoWFN0kD6W+TbFmf9p4KUafiwOghjNezyhEIvxu9fY7RqyQuKyQA/rPqkqeOs1makvMRaYC6y+ZXvYDHOkcIBu2xflnws03G+G4kshoi+M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746613680; c=relaxed/simple; bh=mN/SA7cybJrXxsBWCutgmdZPBRjmsXSS3+VC0dZT/vo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Dc8Xw4tsfzfBS7VkTYbpgQN8z/3fTA6iFam6yJqriS7VU0OIGQog23JKeMjrv+qmfm04E08+Cu1ZHBE3p5TiIDqPcN78LTDwtAHaVlEuzstGhJeasJqZz4aMC4nuayi/NbIxwABogHk78Gk8+ViFvyyhBMKvcPitKHgb6s4dSTY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=OPtQmXVo; arc=none smtp.client-ip=209.85.218.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="OPtQmXVo" Received: by mail-ej1-f45.google.com with SMTP id a640c23a62f3a-ad1e8e2ad6bso156223866b.0 for ; Wed, 07 May 2025 03:27:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1746613677; x=1747218477; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=e3m3Sg0+bVIJxu2EZBhejSmz5ffY//z82ft5OZBcPQk=; b=OPtQmXVoJmlB7jZKrSK31bjK61wQZOLxHyCnVBTgRm+13gRkZd2HtAnymC8nxqkWH/ f8eTgLH3lq5QO/8J0dvYIfWHvy3zk9lUn/+kEpPvrAyx9IvQKvQ3abvKLn8OcwS+8oa1 zmgMv5mSb6AmuZWdRbusC36OOolhq3DC5haJaRHpvKXLJAGWCxampxtihHvmVayTDJeT gOODWGTGcZgFo4/GM6yn/arAzd7ALAKSUvrvt2CJVt9Hc41O9OmZ+lmp++Kyt2IGr9+q f7a+MmuWHFsMBB+mytXTSeKM7OCXZqhKbGwYezmq503IeAbOCJV6GAvZVIgzRI23Zk0V N8EA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746613677; x=1747218477; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=e3m3Sg0+bVIJxu2EZBhejSmz5ffY//z82ft5OZBcPQk=; b=Tk5G4pM0pUPJPw8rcZ4h4WnnexPbyZYtKZ98kFNyI9NXMDO+GGQW+P6KGQ+3EZsXdr FfEZCSUn/cW0HHeQuX9EdwCj3uq7zP1daR08gPGzRgkzKII7ZqDU5xdz/TffX55NCR32 bRLxLlG3VegigqpPrrUG6YlXbTSmuUPXaT/v/NriwPeWRkhVnc44iEMt7v4PRvmPNQxQ zIFjChwRzJss/ZFBvHqGF6CuMm4ulTyNtEbFBzcbQ+C4Bi2+AJh1v0CtiU5dEBguWTGj WEyp9EQWe9VFQ0GuEM74C0c6xdan/cgaNndXMpXN/FA+Ez//cTNCi/O3912e0H8aDA75 G9DQ== X-Gm-Message-State: AOJu0Yy1p7c1yRmH+yJgobyCRD6N6lMlFrjJwSKA5pY8W3IfzvvxrJbQ rPe+sRLmTIIoQ89gPbCMz6P9cpWThKNyDqLjpEzugsJpbwwvi8U9LUhsM2hs5TU= X-Gm-Gg: ASbGncsgOEKG6MFXQUGhxLw7+jNrn9Mp+NZ/vtECTxcAj3E2qfCXmBeqGTnBu9C5MeD 9oZ65GLqqEHD9TZnwApFrR4Zt8SDxlVF9wVVrb3HO1FdHMMdowg3iyWX8CFXsLz074FhkBtDnUk zTZJLkij8u0aR28UBLOr2rWfuGsl1mFjMVsXMuOoRWAblmHiZfufM3EypYpHvnuzPQKlLWGXL1J fu44od3/FAjIARr7m1BOujP9ycb272XXY/MtcOtRuN24/cV+VCJ5NvySgU+YcOMQJrWJyvYfjj8 TOExlNisFi1HIA0cTrfA8xWvOaA1Z7QMVELx2JqXkVzfQm9L X-Google-Smtp-Source: AGHT+IGcySqujnpgP/KzWefd3PmSmn8wVFheaUVYXa/h4ueAk588Gd+cTopnd3x4abbh2j4LBSSshQ== X-Received: by 2002:a17:907:1c9e:b0:ac6:fe8c:e7bb with SMTP id a640c23a62f3a-ad1e8e2bd6cmr275060366b.55.1746613676715; Wed, 07 May 2025 03:27:56 -0700 (PDT) Received: from [192.168.0.32] ([82.76.24.202]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ad18950ad15sm881835766b.154.2025.05.07.03.27.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 07 May 2025 03:27:56 -0700 (PDT) Message-ID: <1331aa82-fee9-4788-abd9-ef741d00909e@linaro.org> Date: Wed, 7 May 2025 13:27:55 +0300 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC][PATCH 09/14] genirq: add irq_kmemdump_register To: Thomas Gleixner , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, andersson@kernel.org Cc: linux-doc@vger.kernel.org, corbet@lwn.net, mingo@redhat.com, rostedt@goodmis.org, john.ogness@linutronix.de, senozhatsky@chromium.org, pmladek@suse.com, peterz@infradead.org, mojha@qti.qualcomm.com, linux-arm-kernel@lists.infradead.org, vincent.guittot@linaro.org, konradybcio@kernel.org, dietmar.eggemann@arm.com, juri.lelli@redhat.com References: <20250422113156.575971-1-eugen.hristev@linaro.org> <20250422113156.575971-10-eugen.hristev@linaro.org> <87h61wn2qq.ffs@tglx> Content-Language: en-US From: Eugen Hristev In-Reply-To: <87h61wn2qq.ffs@tglx> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/7/25 13:18, Thomas Gleixner wrote: > > $Subject: ... See > > https://www.kernel.org/doc/html/latest/process/maintainer-tip.html#patch-submission-notes > > On Tue, Apr 22 2025 at 14:31, Eugen Hristev wrote: >> Add function to register irq info into kmemdump. > > What is irq info? Please explain explicitly which information is exposed > and why. > >> >> +void irq_kmemdump_register(void) >> +{ >> + kmemdump_register("irq", (void *)&nr_irqs, sizeof(nr_irqs)); >> +} >> +EXPORT_SYMBOL_GPL(irq_kmemdump_register); > > Are you going to slap a gazillion of those register a single variable > functions all over the place? > > That's a really horrible idea. > > The obvious way to deal with that is to annotate the variable: > > static unsigned int nr_irqs = NR_IRQS; > KMEMDUMP_VAR(nr_irqs); > > Let KMEMDUMP_VAR() store the size and the address of 'nr_irqs' in a > kmemdump specific section and then kmemdump can just walk that section > and dump stuff. No magic register functions and no extra storage > management for static/global variables. > > No? Thank you very much for your review ! I will try it out. Eugen > > Thanks, > > tglx