From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) (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 0A7B43F9FB for ; Sun, 19 Apr 2026 00:10:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776557405; cv=none; b=VxVWp88F3rN/24latPzexv0HTCUHMYXvlj62q/tKs66EOGkd27Gjkzs3aw6H9+KPaWzrWutv+U81FeqC/SCULW6dqcGeceuA4EImb8v0fCMufauJluLYL4lVVfp5aHdpApjsZk2Ii3yA3hAHZY7Xa2QYzMhx8vranhBhHFOHcU4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776557405; c=relaxed/simple; bh=uOSZ/244y/7ICjlXMpLV2OlKJMkAhM1aUyyRxKS5RkM=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qPFA9KZh00QMSyLPEbRe6nbzvi7deyY/FJBhQjRJDjQmvdM2ot/Ai7EivqID/Z/ObCrw5XPta0XqG46VQq8KjA3/Gzw5uKO5MK51H1ZOCR10yDqn24Vj4IbE4iPW5PL4AwfFnr2YGej+GkxMnoJxm2pjKvjz28gx0Cjz504re6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 95ACC13A3EA; Sun, 19 Apr 2026 00:09:56 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf08.hostedemail.com (Postfix) with ESMTPA id 8B46820028; Sun, 19 Apr 2026 00:09:54 +0000 (UTC) Date: Sat, 18 Apr 2026 20:09:51 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: LKML , Frederic Weisbecker , Joel Fernandes , Eric Dumazet , Kuniyuki Iwashima , Paolo Abeni , Willem de Bruijn , Yao Kai , Peter Zijlstra , Thomas Gleixner Subject: Re: [WARNING] RCU stall in sock_def_readable() Message-ID: <20260418200951.5962b4f4@fedora> In-Reply-To: <20260418192625.279c4e98@fedora> References: <20260415132722.788bbdcf@fedora> <20260417084313.010864e8@fedora> <20260417093025.38faf68d@fedora> <61264010-608d-46dd-884c-2448b65a57ed@paulmck-laptop> <20260418183657.19c00883@fedora> <3c63b4d7-9c30-4671-953c-e5d72ceba97f@paulmck-laptop> <20260418192625.279c4e98@fedora> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.52; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: upbnfsir8wtuwwtoau7f9h1k541nspfu X-Rspamd-Server: rspamout01 X-Rspamd-Queue-Id: 8B46820028 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX18/oo76V9SWr3Rkmyy6R61dygMESKROlsk= X-HE-Tag: 1776557394-248675 X-HE-Meta: U2FsdGVkX1+XHmNxqcDSVzm5I8HxczweYAQXzsCpxiVcqNW/TQORxm23jA1bR/srw0oppbrMtAVKZFSp7Wa4WuGpiPgDX0JzdX1Nb2VboUHD7t2b0dp9aC+E9laBnHWAPRals5NW/MHFI+nAoxIYmuDj0BYf+gPHyTguM5/VgaqA0cxPBfddD0fpK0HfsUa68xExd/5S/XzNANEs+w/hPwW6hDIRzTK3CSA85CM1znovwTJxNX/c0abiSzdiprVI/plQ5h6UlnqxDSt3YN1iadpFO0A4xXxCAQP7Po+LqpMxCMErYO0nygVHBVt4t8GAkLVgFdI+7ATr9mAIV0ZRahtMHIHRtxXmDafs8YDRoqiiA6h5V1nRpXIgkT05GOFd On Sat, 18 Apr 2026 19:26:25 -0400 Steven Rostedt wrote: > Yes, PREEMPT_DYNAMIC is set. I guess I can test it without it set and > see if the problem goes away. If that's the case, I'll just disable > that for this one test that keeps failing due to that warning. This looks to be my solution. I usually can trigger the issue with 2 or 3 runs of tracing hackbench. I just finished running it 10 times and it hasn't triggered. I'll let it run a few more times but I'm going to disable PREEMPT_DYNAMIC in my tests, and hopefully it doesn't fail due to this anymore. -- Steve