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 A547B7E0E8; Tue, 27 May 2025 14:50:35 +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=1748357437; cv=none; b=NRMdf8kZx3P40zTOcGWPOm8rQLCYpgTTE3QnrEw44B2jMa0gq3IMGLt1Z4QLE0bo2tKahGRCypp4U/4uJTsDH7NIZz77IHOknPgEUygx6BrQDecU5rkWNvdpeDx8/H3sqvtu3OKVIh89AAg4L+m6tBYQ2R7tsERej9J+cnpv2vo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748357437; c=relaxed/simple; bh=FEbfS+UuSSerkfHo9hXlvZXI3ZHzyKqp+ZFEEJh+akI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cwSyGOxQ/BwMZ11lpwtxXAlePYQHCrfGmI/jUJuedTNFVmytv+yxH3k+d9fVAhwG3/97cQ5ZkWTH5HyLhzJDl9WYbyQJTcERdpBA2T+CsGkRl7/BhrOHWXe1jO2P+738LaGehLKuizpPWyMh04+MQoZizxOPhDoQ4m/kdhfF2sg= 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=XQg8lBZ+; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=xWZrCapJ; 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="XQg8lBZ+"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="xWZrCapJ" Date: Tue, 27 May 2025 16:50:32 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1748357433; 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=6iZ7GLWczHbCwoKVC3idZCK4EPn/0CsUSuZvQby/Nyw=; b=XQg8lBZ+vxH7yFPMafojrv7Xiq31HBpEsvyEMW9qNBld1Op8ZpVkIoOvAU5D9yoaZ6h+MR OCkIyCK71Gze66CqKhUJgCeDWT2mFzU5GSVZ6dG0VsTtniTKI86chxbaTGhN3zklQsXxfE BHTi1pOa+fpIKOW/qkO4NNV7cwz5o/mDA52zbG5VxcswmAU69uZIrudvbAnm0foClWY24I TckBeS0d1VH4Fo8hx2KuILazScDjaE2og5fs4H4mNaKMEtnNK05eyD+FgDcrezwzk1wf6t EdQHxsApdoL6Il8TbgyPu8NMppximGSyspDicBEZTfOLhq1RTeO9Ago6oc64zg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1748357433; 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=6iZ7GLWczHbCwoKVC3idZCK4EPn/0CsUSuZvQby/Nyw=; b=xWZrCapJs8ABU6OwpQ2Xc3CkeDsfDH3EEdtFsr/JSskcufD8rYsH/atgmjB9bLwEnSNKXl 4Y9rEez+ancOcbCg== From: Nam Cao To: Gabriele Monaco Cc: linux-kernel@vger.kernel.org, Steven Rostedt , linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Tomas Glozar , Juri Lelli Subject: Re: [RFC PATCH v2 12/12] rv: Add opid per-cpu monitor Message-ID: <20250527145032.fIN-37M_@linutronix.de> References: <20250514084314.57976-1-gmonaco@redhat.com> <20250514084314.57976-13-gmonaco@redhat.com> <20250527133712.CFW5AcNE@linutronix.de> <6f33e6b7ad296f4fd0e9c089ac92e53c08cfd850.camel@redhat.com> 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-Disposition: inline In-Reply-To: <6f33e6b7ad296f4fd0e9c089ac92e53c08cfd850.camel@redhat.com> On Tue, May 27, 2025 at 04:35:04PM +0200, Gabriele Monaco wrote: > Thanks for trying it out, and good to know about this stressor. > Unfortunately it's a bit hard to understand from this stack trace, but > that's very likely a problem in the model. I have a few ideas where that > could be but I believe it's something visible only on a physical machine > (haven't tested much on x86 bare metal, only VM). > > You're running on bare metal right? No, it's QEMU: qemu-system-x86_64 -enable-kvm -m 2048 -smp 4 \ -nographic \ -drive if=virtio,format=raw,file=bookworm.img \ -kernel /srv/work/namcao/linux/arch/x86/boot/bzImage \ -append "console=ttyS0 root=/dev/vda rw" \ The kernel is just x86 defconfig + the monitors. Nam