You mention you tested v3.11-rc2 in comment #5. Can you also test the latest mainline kernel, which is v3.11-rc6: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc6-saucy/
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1214085 Title: LXC + BTRFS: creating many containers simultaneously can cause system corruption Status in “linux” package in Ubuntu: Confirmed Bug description: Using lxc with a btrfs filesystem can lead to system corruption and containers which are unable to boot when many containers are created and started simultaneously. Packages involved: - btrfs-tools - ubuntu-lxc/daily from http://ppa.launchpad.net/ubuntu-lxc/daily/ubuntu `lsb_release -rd`: ubuntu@ip-10-91-30-131:~$ lsb_release -rd Description: Ubuntu 12.04.2 LTS Release: 12.04 Here is the relevant discussion thread: http://www.mail-archive.com /lxc-us...@lists.sourceforge.net/msg05472.html And here is a key excerpt regarding reproducing the problem: The general system state is something like: N containers already running happily Launch N+ more containers in rapid succession (in parallell, not serially). Here is a test script which closely reflects what my application is actually doing. It slowly launches 10 containers and then uses "&" to rapidly fork an additional 10 clone/start operations. I have it doing 2 cycles of this, and running the script many times (2-6 times) eventually triggers the problem. test.sh: #!/usr/bin/env bash prefix=$1 test -z "${prefix}" && echo 'error: missing required parameter: prefix' 1>&2 && exit 1 path=/mnt sudo lxc-destroy -n c1 2>/dev/null sudo lxc-create -t ubuntu -B btrfs -n c1 for i in `seq 1 10`; do sudo lxc-clone -s -B btrfs -P $path -o c1 -n $prefix$i sudo lxc-start -d -n $prefix$i done for i in `seq 11 20`; do echo $(sudo lxc-clone -s -B btrfs -P $path -o c1 -n $prefix$i; sudo lxc-start -d -n $prefix$i) & done sleep 10 # Create even more. for i in `seq 21 30`; do sudo lxc-clone -s -B btrfs -P $path -o c1 -n $prefix$i sudo lxc-start -d -n $prefix$i done for i in `seq 31 40`; do echo $(sudo lxc-clone -s -B btrfs -P $path -o c1 -n $prefix$i; sudo lxc-start -d -n $prefix$i) & done stop.sh: #!/usr/bin/env bash prefix=$1 test -z "${prefix}" && echo 'error: missing required parameter: prefix' 1>&2 && exit 1 sudo lxc-destroy -n c1; for i in `seq 1 40`; do echo $(sudo lxc-stop -k -n $prefix$i; sudo lxc-destroy -n $prefix$i) & done bash ./test.sh x bash ./test.sh y bash ./test.sh z If it doesn't manifest at first, try starting/stopping/destroying varying quantities of containers for several cycles. Eventually I consistently end up not ever getting ip addresses or being able to even successfully start a container: x1 RUNNING - - NO x10 RUNNING - - NO x11 RUNNING - - NO x12 RUNNING - - NO x13 RUNNING - - NO x14 RUNNING - - NO x15 RUNNING - - NO x16 RUNNING - - NO x17 RUNNING - - NO x18 RUNNING - - NO x19 RUNNING - - NO x2 RUNNING - - NO x20 RUNNING - - NO x21 RUNNING - - NO x22 RUNNING - - NO x23 RUNNING - - NO x24 RUNNING - - NO x25 RUNNING - - NO x26 RUNNING - - NO x27 RUNNING - - NO x28 RUNNING - - NO x29 RUNNING - - NO x3 RUNNING - - NO x30 RUNNING - - NO x31 RUNNING - - NO x32 RUNNING - - NO x33 RUNNING - - NO x34 RUNNING - - NO x35 RUNNING - - NO x36 RUNNING - - NO x37 RUNNING - - NO x38 RUNNING - - NO x39 RUNNING - - NO x4 RUNNING - - NO x40 RUNNING - - NO x5 RUNNING - - NO x6 RUNNING - - NO x7 RUNNING - - NO x8 RUNNING - - NO x9 RUNNING - - NO ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-40-virtual 3.2.0-40.64 ProcVersionSignature: Ubuntu 3.2.0-40.64-virtual 3.2.40 Uname: Linux 3.2.0-40-virtual x86_64 AcpiTables: AlsaDevices: total 0 crw-rw---T 1 root audio 116, 1 Aug 14 20:40 seq crw-rw---T 1 root audio 116, 33 Aug 14 20:40 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Mon Aug 19 18:20:19 2013 Ec2AMI: ami-d0f89fb9 Ec2AMIManifest: (unknown) Ec2AvailabilityZone: us-east-1a Ec2InstanceType: m1.large Ec2Kernel: aki-88aa75e1 Ec2Ramdisk: unavailable Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 MarkForUpload: True PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=LABEL=cloudimg-rootfs ro console=hvc0 RelatedPackageVersions: linux-restricted-modules-3.2.0-40-virtual N/A linux-backports-modules-3.2.0-40-virtual N/A linux-firmware 1.79.4 RfKill: Error: [Errno 2] No such file or directory SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214085/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
