From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay12.mail.gandi.net (relay12.mail.gandi.net [217.70.178.232]) (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 9B3667F for ; Sat, 24 Sep 2022 08:26:47 +0000 (UTC) Received: (Authenticated sender: philippe.gerum@sourcetrek.com) by mail.gandi.net (Postfix) with ESMTPSA id BCAC1200009; Sat, 24 Sep 2022 08:26:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xenomai.org; s=gm1; t=1664007999; 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=3wveTfvzidwP+Vk6p9uqOHABY51pZuVmbq6/50zAqCY=; b=g/pA8LJ24l6u+8NMsXgGc+dINz+D/iWOTHQalkR94HjGHa6GrnnvB4bGds1t+rjXEp+a97 HTuuMf3dYFDbB7DjLLgitxV/9CfF/8weWcgs0aZwY6XNn1r18k/Uq9rm11hwvQT6/HPVvs 3PJurbFkpI3xRYzYoMwm1FJAt7WwRUlhpBiXtJc5PVBPxf1DSOhIUSEpMnp559YFZsh1W6 d/YiGi5pwFViWlf8IBSkAxplb0K/QiUBGmWW9Kg3eTMFyF70KLSWev5y+pYfytGmoBS6LO +f2psRo7iz/z2NuczghWzPo6QYZcg1ic+0cRjq28Yr9tsO/wsgWboCie3vgW6w== References: <87pmfncw9u.fsf@xenomai.org> User-agent: mu4e 1.6.6; emacs 28.1 From: Philippe Gerum To: Bryan Butler Cc: Russell Johnson , "xenomai@lists.linux.dev" Subject: Re: [External] - Re: System hanging when using condition variables Date: Sat, 24 Sep 2022 10:21:32 +0200 In-reply-to: Message-ID: <87o7v59o02.fsf@xenomai.org> Precedence: bulk X-Mailing-List: xenomai@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Bryan Butler writes: > I have another system that behaves slightly differently. When it hits the watchdog, here's what I get: > I have been able to reproduce a bug on an armv7 SoC with the test case you provided. Sometimes the RCU stall detector triggers, sometimes it's a plain hard lockup. I believe these are symptoms of the same bug, which _seems_ to hide in the PI chain management. I'm on it. -- Philippe.