From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Thomas D." Subject: Re: req->nr_phys_segments > queue_max_segments (was Re: kernel BUG at drivers/block/virtio_blk.c:172!) Date: Thu, 1 Oct 2015 17:35:58 +0200 Message-ID: <560D52DE.3020303@whissi.de> References: <560C87F6.4080708@whissi.de> <20151001114817-mutt-send-email-mst@redhat.com> <560CFAD3.1030607@suse.de> <560D36DC.5050205@whissi.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from borg.tf-network.de ([62.75.218.204]:43853 "EHLO borg.tf-network.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752696AbbJAPgC (ORCPT ); Thu, 1 Oct 2015 11:36:02 -0400 In-Reply-To: <560D36DC.5050205@whissi.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Mike Snitzer , Hannes Reinecke Cc: "Michael S. Tsirkin" , Jens Axboe , Christoph Hellwig , "virtualization@lists.linux-foundation.org" , "linux-scsi@vger.kernel.org" Hi, seems like we have two problems: The first (origin) problem seems to be already fixed by Mike's patch. I applied the patch against linux-4.1.8, rebooted several times without a problem. But I'll keep testing for sure. The second problem is a new bug within linux-4.1.9: I experience the > NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! freeze now on all my systems (virtual machines *and* physical systems; Gentoo boxes, Debian boxes, with and without dm (LUKS), with XFS or ext4 -- looks like a general problem). I will post it to LKML itself (I don't have a trace about what's hanging). Thanks for all your time and help! -Thomas