From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B5ED23ACF00 for ; Tue, 3 Feb 2026 16:09:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770134947; cv=none; b=TYH9QQpQXoYHVrViicsqhZA9hmS0A7/oOfpLUuJfeAswB9iqdpmFoVr3XFl6Q5GjS4F4swPIuuclZobKJdSLkc3VzGI4Y2a8n6kUcT6Kge+moB/mnaV92gCJpvVjt/cYnHm7Ur+4kQ6pMwmosHaFgtuIQV3sz7mCzRBn3Et+Bzg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770134947; c=relaxed/simple; bh=rk5XPhQbzcw1AW/poa+89cVBU6a3fVGKuXv+M9YLoqI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=OdGDdSgKRpLyb5oNnai55znBoc2JhhIxOwEw25dLualfmN/MeP3kS5nTZka1KDS+gVvDiW5Vvmafekr0PPlHbCTl2Y0FibxVA5XZaoRB6oiYBqTe1dBOwy66fn8Ttxv3EgCzxtuLIQTFXlxKe8/nhSP/wO1oDFJutg81JWzIazU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=qOUa/oPI; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=56oRhXX3; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="qOUa/oPI"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="56oRhXX3" From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1770134937; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UG3nSmFTSr4C29o+8Xp+waZP49zgJqnkQazhgTvdvlc=; b=qOUa/oPIhmO1SU8x7nWI/wqeF/sPARQW0Yyte9ii8GjcN14+8YEfzpfeAT7EhWgd/LCCfs UXA0Pt+JEP4Ul101jD7XiAehLjgjyAEwdKNgheXhN86/EsbR304K6Fq24vfYIUzzTtt+Bz ITUEvbonFVdokZ2e71RKtCn9x9436WOJ2MP4vc3oEPtUD0AVWpzLIfUunm7gCmeoneHR0i jnI0UkwxVo2TNGwp0wi3sghGNQi8pqW30gNFonPVeOik39mbXC+MGyrTUkay6R+hnmHdE5 17dtTYsX9enzCaUW7E09QVUxQkxvmSIK8M/OhdH1zhbTWCjcLhJm0FxMJtsPrQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1770134937; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UG3nSmFTSr4C29o+8Xp+waZP49zgJqnkQazhgTvdvlc=; b=56oRhXX3VC/n5CS+lfuQ7NsdM0SSGicqvchxCZNXmwtjvkfy7UTiVIqItUgLC5HZMBAGuf FzDDr091AAMUJ/Ag== To: Ricardo Neri , Tony Luck , Dave Hansen , "Rafael J. Wysocki" , Reinette Chatre , Dan Williams Cc: Andi Kleen , Stephane Eranian , Ricardo Neri , linux-kernel@vger.kernel.org, Alexander Graf Subject: Re: [PATCH v7 18/24] init/main: Delay initialization of the lockup detector after smp_init() In-Reply-To: <20230301234753.28582-19-ricardo.neri-calderon@linux.intel.com> References: <20230301234753.28582-1-ricardo.neri-calderon@linux.intel.com> <20230301234753.28582-19-ricardo.neri-calderon@linux.intel.com> Date: Tue, 03 Feb 2026 17:08:56 +0100 Message-ID: <871pj14xnr.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Wed, Mar 01 2023 at 15:47, Ricardo Neri wrote: > Certain implementations of the hardlockup detector require support for > Inter-Processor Interrupt shorthands. On x86, support for these can only > be determined after all the possible CPUs have booted once (in smp_init()). > Other architectures may not need such check. Looking at this with a completely rebooted brain, I think this is not required at all when the HPET watchdog mechanics to propagate the watchdog NMI are done differently. I'll comment on that in the related patch. Thanks, tglx