From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56888) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1akoqt-0004Os-Q4 for qemu-devel@nongnu.org; Tue, 29 Mar 2016 04:18:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1akoqq-00008O-Gm for qemu-devel@nongnu.org; Tue, 29 Mar 2016 04:18:15 -0400 Received: from e06smtp12.uk.ibm.com ([195.75.94.108]:50050) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1akoqq-00006f-6K for qemu-devel@nongnu.org; Tue, 29 Mar 2016 04:18:12 -0400 Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 29 Mar 2016 09:18:10 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id 5A44217D8059 for ; Tue, 29 Mar 2016 09:18:45 +0100 (BST) Received: from d06av11.portsmouth.uk.ibm.com (d06av11.portsmouth.uk.ibm.com [9.149.37.252]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u2T8I77t54788334 for ; Tue, 29 Mar 2016 08:18:08 GMT Received: from d06av11.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av11.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u2T8I7Lt022452 for ; Tue, 29 Mar 2016 02:18:07 -0600 Date: Tue, 29 Mar 2016 10:18:05 +0200 From: Cornelia Huck Message-ID: <20160329101805.7ff42e7c.cornelia.huck@de.ibm.com> In-Reply-To: <56F41E8D.5000609@redhat.com> References: <1458836125-73613-1-git-send-email-cornelia.huck@de.ibm.com> <56F41E8D.5000609@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/6] virtio: refactor host notifiers List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: famz@redhat.com, borntraeger@de.ibm.com, mst@redhat.com, qemu-devel@nongnu.org, tubo@linux.vnet.ibm.com, stefanha@redhat.com On Thu, 24 Mar 2016 18:06:21 +0100 Paolo Bonzini wrote: > On 24/03/2016 17:15, Cornelia Huck wrote: > > Here's the next version of my refactoring of the virtio host notifiers. > > This one actually survives a bit of testing for me (reboot loop). > > > > As this patchset fixes a latent bug exposed by the recent dataplane > > changes (we have a deassigned ioeventfd for a short period of time > > during dataplane start, which leads to the virtqueue handler being > > called in both the vcpu thread and the iothread simultaneously), I'd > > like to see this in 2.6. > > Tested-by: Paolo Bonzini > > Resisted 6 minutes versus 10 seconds. At about 2.5 seconds per reboot, > that means the failure happened at the fourth reboot before, and > resisted about 150 reboots with your patches. Thanks for testing! Is the failure still the same? I thought I had understood the problem by now, and I'm wondering which hole we're still missing.