From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1752948AbdJPORj (ORCPT <rfc822;w@1wt.eu>);
        Mon, 16 Oct 2017 10:17:39 -0400
Received: from Galois.linutronix.de ([146.0.238.70]:51712 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1752290AbdJPORd (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 16 Oct 2017 10:17:33 -0400
Date: Mon, 16 Oct 2017 16:16:19 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Petri Latvala <petri.latvala@intel.com>
cc: Yu Chen <yu.c.chen@intel.com>, Juergen Gross <jgross@suse.com>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Tony Luck <tony.luck@intel.com>, Marc Zyngier <marc.zyngier@arm.com>,
        Alok Kataria <akataria@vmware.com>, Joerg Roedel <joro@8bytes.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Steven Rostedt <rostedt@goodmis.org>, Christoph Hellwig <hch@lst.de>,
        Peter Zijlstra <peterz@infradead.org>, Borislav Petkov <bp@alien8.de>,
        Paolo Bonzini <pbonzini@redhat.com>, Rui Zhang <rui.zhang@intel.com>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Arjan van de Ven <arjan@linux.intel.com>,
        Dan Williams <dan.j.williams@intel.com>, Len Brown <lenb@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: Regression in linux-next
In-Reply-To: <9923015d-ea50-27d1-1a38-f661f05dd09f@intel.com>
Message-ID: <alpine.DEB.2.20.1710161614430.1973@nanos>
References: <c3f2d5df-2fd9-5e7f-b744-144e0575f61b@intel.com> <20171013110850.GA5303@yu-chen.sh.intel.com> <149ec6e8-4189-040c-a53c-12b0a51a855e@intel.com> <c1f48dee-bf92-4076-eb15-6e306786bf50@intel.com> <e1689005-7e4e-a3c9-5f81-57d337a57a2f@intel.com>
 <cd667019-c16e-60db-7c5d-f2f1cf8d7351@intel.com> <alpine.DEB.2.20.1710161237260.1973@nanos> <e3598cc0-429d-c47f-f300-c955466481d1@intel.com> <alpine.DEB.2.20.1710161402380.1973@nanos> <alpine.DEB.2.20.1710161452560.1973@nanos>
 <9923015d-ea50-27d1-1a38-f661f05dd09f@intel.com>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 16 Oct 2017, Petri Latvala wrote:
> On 10/16/2017 03:54 PM, Thomas Gleixner wrote:
> > > Hrm. I completely forgot that this does not dump the buffers of offline
> > > CPUs. So half of the information is missing. So forget the tracer for now.
> > > 
> > > Can you please apply the debug patch below and provide the full dmesg
> > > output?
> > > 
> > > Its going to be too big for LKML so either upload it somewhere or send it
> > > to me in private mail.
> > > 
> > > Note, I removed the BUG_ON, so box might survive suspend/resume but it
> > > should trigger that printout.
> > Forgot to add the counterpart to the clear side. Updated patch below.
> 
> http://paste.debian.net/991048/

Thanks for providing the data! Does the patch below fix the issue?

Thanks,

	tglx

8<---------------

--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -809,7 +809,7 @@ static void free_moved_vector(struct api
 
 	trace_vector_free_moved(apicd->irq, vector, managed);
 	irq_matrix_free(vector_matrix, cpu, vector, managed);
-	__this_cpu_write(vector_irq[vector], VECTOR_UNUSED);
+	per_cpu(vector_irq, cpu)[vector] = VECTOR_UNUSED;
 	hlist_del_init(&apicd->clist);
 	apicd->prev_vector = 0;
 	apicd->move_in_progress = 0;