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 X-Spam-Level: X-Spam-Status: No, score=-4.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E1FAC4338F for ; Wed, 18 Aug 2021 15:44:09 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E8A0060EFF for ; Wed, 18 Aug 2021 15:44:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E8A0060EFF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Reply-To:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ro0Qg9+itDMleRhdRnZyVw9gaYkloavJUM1fcwSmXwk=; b=qlOIAOgzuhK2/5 1JCbBbCLscHSyWJ3No5/Gn9br22sI3ibUfVqElkB1QiRgbj+o0tdD/VQ7F84x8eWTTgQaDS7juo79 1gVf1UyH8JmRsK+vW7FhY+It5BqNHYp/ZJgnP0LJ7B+w1xOmhVLTuWKr1+ICLmCES9khNA3pHby5Y pW9xvAtxix0CHRv55P0VK9o3aEj8ogEEO7BzMwdkipGw2yx8hgqwCnlxC8IGLae40FicIjlyQ8eno 0AVuO39poU1n/XfWf7Wr258ZQZTa7sFYBLIfk+bTQcXNVJq4viHHI6XU5d2oOda4Uhcn6Jy0quYqZ iYEaW23zJts5s5ydZg9g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGNjW-0065a4-De; Wed, 18 Aug 2021 15:44:02 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGNjT-0065Yk-DD for ath10k@lists.infradead.org; Wed, 18 Aug 2021 15:44:00 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7E9DF60EFF; Wed, 18 Aug 2021 15:43:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629301438; bh=MwqiLS/+P5aIrGr3Qc5NcX2A3jn4UKNerJSZzZiOj/k=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=OAm2wOz9uDTfrQbewMMgZRbK28sOaLQyxRWyBHHX5DHuMhip+OhonIV19UofrK6O4 br/W1qnbF4ARqUnHvijo3jMRX+fRaSrsDG0pMe6oKNQWgeHV5Es8lwTb9ZXnKtjtTX Kp54gJVHQWIIxqfGr0uZNH/G4sEnNSHkxOpoxysG+ZIGCIHd/1PgyT88jZRtvL02R5 YSEbeIUxQETb713d3YZ0Y0RlUiSeg61YG6SCcnuZaFZFVNpBFlGAKiZ3e6/gW7MwFp yEyVpTIfAWjkFKolgac0HxFJIbattr2bWK7rxLNOmEeAWxYZBj8rC/xtt6vrV/0J+s R9EbRaiWD52Xg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 4E5B25C04B1; Wed, 18 Aug 2021 08:43:58 -0700 (PDT) Date: Wed, 18 Aug 2021 08:43:58 -0700 From: "Paul E. McKenney" To: Fabio Estevam Cc: Kalle Valo , ath10k@lists.infradead.org, linux-mmc , Ulf Hansson , Marek Vasut , qais.yousef@arm.com Subject: Re: NOHZ tick-stop error with ath10k SDIO Message-ID: <20210818154358.GS4126399@paulmck-ThinkPad-P17-Gen-1> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210818_084359_536454_59B2A9CF X-CRM114-Status: GOOD ( 12.53 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: paulmck@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+ath10k=archiver.kernel.org@lists.infradead.org On Wed, Aug 18, 2021 at 12:18:25PM -0300, Fabio Estevam wrote: > Hi, > > When launching the hostapd application on a i.MX7 based board with an > ath10k device connected via SDIO, the following "NOHZ tick-stop error" > messages are seen: > > # hostapd /etc/wifi.conf > Configuration file: /etc/wifi.conf > wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE > [ 63.021149] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > Using interface wlan0 with hwaddr 00:1f:7b:31:04:a0 and ssid "thessid" > [ 67.332470] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready > wlan0: interface state COUNTRY_UPDATE->ENABLED > wlan0: AP-ENABLED > [ 68.025845] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 69.025973] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 69.607432] cfg80211: failed to load regulatory.db > [ 72.026748] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 73.027039] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 74.027159] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 75.027109] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 76.027461] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 77.027391] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > [ 78.027560] NOHZ tick-stop error: Non-RCU local softirq work is > pending, handler #08!!! > > This happens on all kernel versions from 5.10 to 5.13. > > Any ideas on how to fix this problem? I believe that you need this commit (and possibly some prerequsites): 47c218dcae65 ("tick/sched: Prevent false positive softirq pending warnings on RT") Adding Qais on CC for his thoughts. Thanx, Paul _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k