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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 40250C4345F for ; Tue, 30 Apr 2024 01:37:16 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=SNxDRsNt; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4VT2qt4yKdz3d95 for ; Tue, 30 Apr 2024 11:37:14 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=SNxDRsNt; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=139.178.84.217; helo=dfw.source.kernel.org; envelope-from=kuba@kernel.org; receiver=lists.ozlabs.org) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4VT2q54tztz2xQK for ; Tue, 30 Apr 2024 11:36:33 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id E255461017; Tue, 30 Apr 2024 01:36:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FCAAC116B1; Tue, 30 Apr 2024 01:36:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714440991; bh=hLCqbm6aIHgWboKq7U6esLVQy2ezFjYgNfa+jq86Qms=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=SNxDRsNth4mCdKAE8SCUUduLz58XEHWRJ66Ejp3clOgJy6mzJ66rHye7Ww32vrueX +Th/oK03WOn40YOaiCrz5qQB2Xw3qTO7I1VUl7wXc0yL+aZI1GssRgLA9/eTm19IWz eR6yy9Y9gs6eWkBaAighK+dJYYYSi/wCgrQZTnehBOQAGhJKFocjdXw+qdICOgSiHH frwN6LiFL//c27KEwY47qWEBUl4NUMx4e1dGm6NHxKV3h88yYl+b5UL34ZUgxhCRQx UmHBalOoNLAiTWNa5yuzQ6BDN5c9kg2SKWs8eLzAAYhAOPDtG1WjsVIcHASP/2UIjB jHDfQS1Xo0Tlw== Date: Mon, 29 Apr 2024 18:36:30 -0700 From: Jakub Kicinski To: Erhard Furtner Subject: Re: WARNING: CPU: 1 PID: 1 at net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c at boot when netconsole is enabled (kernel v6.9-rc5, v6.8.7, sungem, PowerMac G4 DP) Message-ID: <20240429183630.399859e2@kernel.org> In-Reply-To: <20240428125306.2c3080ef@legion> References: <20240428125306.2c3080ef@legion> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Sun, 28 Apr 2024 12:53:06 +0200 Erhard Furtner wrote: > With netconsole enabled I get this "WARNING: CPU: 1 PID: 1 at > net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c" and "WARNING: > CPU: 1 PID: 1 at kernel/locking/irqflag-debug.c:10 > warn_bogus_irq_restore+0x30/0x44" at boot on my PowerMac G4 DP. > Happens more often than not (6-7 out of 10 times booting): Could you try with LOCKDEP enabled? I wonder if irqs_disabled() behaves differently than we expect.