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 6A5A0231C9C for ; Thu, 27 Feb 2025 13:43:07 +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=1740663788; cv=none; b=Eg1d4Ag5HEUgDVP0mKh0tcL4BMI2umx7lnOLy5lOAaOCjiejmw3mZewzzKo8bp54PEoFcYfV4arLU3hWAem8KD+5jjOK/BrayoUnrS9BbMmrGGx1dgb6OZheRtvlLKGEJY45S+9tsDwA9P7JL1jBJ0IoLY+1TVGZydL2Z2ADdlw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740663788; c=relaxed/simple; bh=XFCCgJ0k5nw8INCoG1gONREVyzMBaQY81ZI4AecCGRs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=klClT1ccJBipo1Qs2ACwJ6LGrv4q0YGFjR/kLtnJPuUoNeKkO/pg30sCL1vmLYniqYxbnj2uCTOUjrTYAat1zIYDNndD2/D5PQLlvy7A1Grtc1FtjHLE+//pUdA85G2mpsZZ7Iby94noF2YXRyvqLKd6n+aETiXl3kx98Ra2vB4= 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=U5lm9fQL; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=WZqhw39N; 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="U5lm9fQL"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="WZqhw39N" Date: Thu, 27 Feb 2025 14:43:04 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1740663785; 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=RvbfOffyxveWdmPGYolcxGxN1HF6N3WIm0SJAES6EXw=; b=U5lm9fQL9Yf6GW54ri05aJUorkrW2CwldgtDRx4DI4KnmiIQtzp7ENDSpMtbWnxHOmldMh sm7iLOZ9EF8EbbIqlRheJfkP08Yj3KYPdNChU3wNqjr7snSVUOgcLI6GmkQE/RKoiI1UpQ iU2bEFoDLzUUlqpcZtUIlo7+A+rly9Yrv7VCtzAXlY36JHAcQgYrE6vNnoA5FCVV/CfL0Z 3NAL5m6/ovv6eSoUBqVy/A6MmuZatWcq8qOqBCrIU2RMnN5Ctn8gOlq0V6s9EWZVJ7O/Lv PnnLK2J3WmRJ2OA2VdzC+qYTPWtpYyIwKc7tM2+L79kOFtUF9i2xonb3DuHW5A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1740663785; 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=RvbfOffyxveWdmPGYolcxGxN1HF6N3WIm0SJAES6EXw=; b=WZqhw39NsoGODApa45P5bWANlYLC/Ge2JP1xstDGB++HHokJwW08c406i0I+3DWkrRbCWx vmBzsgGdJUy8EoDQ== From: Sebastian Andrzej Siewior To: Florian Bezdeka Cc: "linux-rt-users@vger.kernel.org" , "Ziegler, Andreas" , "Kiszka, Jan" , "MOESSBAUER, Felix" Subject: Re: 6.1-rt: NOHZ tick-stop error: local softirq work is pending Message-ID: <20250227134304.xLBfiIC7@linutronix.de> References: <73c50e2fb53ba8cc2f1538abccc42e98fa63159b.camel@siemens.com> <20250224115557.AIFtijeu@linutronix.de> <20250226091752.jCsLqq66@linutronix.de> <7cace5d70278f8ae1debe8cb8d392fb3f59291ff.camel@siemens.com> Precedence: bulk X-Mailing-List: linux-rt-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <7cace5d70278f8ae1debe8cb8d392fb3f59291ff.camel@siemens.com> On 2025-02-26 23:23:30 [+0100], Florian Bezdeka wrote: > > NAPI threads? You have RPS enabled by any chance? > > Would commit > > dad6b97702639 ("net: Allow to use SMP threads for backlog NAPI.") > > 80d2eefcb4c84 ("net: Use backlog-NAPI to clean up the defer_list.") > > With NAPI threads I meant the kernel threads driving the NAPI poll > which can be activated by "echo 1 > /sys/class/net/$device/threaded" > > RPS is build configuration wise enabled but not configured. If RPS is disabled then this might be something else. > As Felix already reported, backporting the mentioned commits to 6.1 > would require some manual work. Simply picking all the dependencies > seems too much for now. Will have a look again... Can you reproduce this on a later (more recent) kernel? What are the steps to reproduce this? Sebastian