From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zdenek Kabelac Subject: Re: lvm2 hangs when creating snapshot of live root and IO to the root filesystem is happening Date: Thu, 10 Jan 2013 10:28:02 +0100 Message-ID: <50EE89A2.2010907@redhat.com> References: <50EDD0F3.5030807@passchier.net> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <50EDD0F3.5030807@passchier.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development Cc: 1096520@bugs.launchpad.net, Peter & Kelly Passchier List-Id: dm-devel.ids Dne 9.1.2013 21:20, Peter & Kelly Passchier napsal(a): > 1. One-line summary > lvm2 hangs when creating snapshot of live root and IO to the root filesystem > is happening > > > 2. Full description > Root filesystem ext4 on lvm2 extent in luks-encrypted > partition with mainline kernel 3.8-rc2. > This is causing a hang: > lvcreate -s -n oscopy -v -l 100%FREE /dev/secret/root 2>/root/savefile > > See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1096520 Attach full -vvvv trace. Hmm bugreport talks about 2.6.35 kernel. My first suspect would be the 'Debian way' of handling udev rules - handling differes from the upstream solution and must be tracked and fixed on Debian. > > 6. Script to replicate the problem > lvcreate -s -n oscopy -v -l 100%FREE /dev/secret/root 2>/root/savefile '-vvvv' Attach also 'changes' to udev rules from the upstream solution. Probably udevadm monitoring output would be also useful. Any cookies left unfinished 'dmsetup udevcookies' ? Zdenek