From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 47451] need to re-load driver in guest to make a hot-plug VF
 work
Date: Thu, 20 Sep 2012 04:36:50 +0000 (UTC)
Message-ID: <20120920043650.CCF3411FA61@bugzilla.kernel.org>
References: <bug-47451-28872@https.bugzilla.kernel.org/>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail.kernel.org ([198.145.19.201]:57090 "EHLO mail.kernel.org"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751673Ab2ITEg5 (ORCPT <rfc822;kvm@vger.kernel.org>);
	Thu, 20 Sep 2012 00:36:57 -0400
Received: from mail.kernel.org (localhost [127.0.0.1])
	by mail.kernel.org (Postfix) with ESMTP id B768D20202
	for <kvm@vger.kernel.org>; Thu, 20 Sep 2012 04:36:56 +0000 (UTC)
Received: from bugzilla.kernel.org (unknown [198.145.19.217])
	by mail.kernel.org (Postfix) with ESMTP id D830A20200
	for <kvm@vger.kernel.org>; Thu, 20 Sep 2012 04:36:55 +0000 (UTC)
In-Reply-To: <bug-47451-28872@https.bugzilla.kernel.org/>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

https://bugzilla.kernel.org/show_bug.cgi?id=47451





--- Comment #3 from Alex Williamson <alex.williamson@redhat.com>  2012-09-20 04:36:50 ---
(In reply to comment #2)
> (In reply to comment #1)
> >Can we narrow down the kvm.git commit range at all?  The
> > one provided is over 12k commits covering v3.4-rc3 to v3.5-rc6.  Thanks
> I did more testing.
> Do you remember the bug #43328 ( VT-d/SR-IOV totally doesn't work in guest)?
> Just use your fix commit for that bug, I'll meet this hot-plug issue.
> Is there a chance your patch fixed one bug but introduced another one? :)
> 
> commit a76beb14123a69ca080f5a5425e28b786d62318d
> Author: Alex Williamson <alex.williamson@redhat.com>
> Date: Mon Jul 9 10:53:22 2012 -0600
> 
>     KVM: Fix device assignment threaded irq handler

Thanks for the narrowing it down.  It looks like perhaps that patch was
ineffective at trying to keep us out of using IRQF_ONESHOT due to
irq_setup_forced_threading() re-enabling it.  Does the problem go away if you
change the two calls to request_threaded_irq() in that commit to use
IRQF_NO_THREAD for the flag value in place of 0?

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.