Zdenek, thank you for your reply. I am using stock ubuntu natty: 2.6.38-8-server #42-Ubuntu SMP Mon Apr 11 03:49:04 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux and 2.02.66 is what comes with natty. I will check the udev rules part further. If I want to try the new LVM package, say LVM2.2.02.88.tgz, do I need to do any update to the kernel, or will it work with my existing kernel 2.6.38-8-server. Thanks, Alex. On Tue, Aug 23, 2011 at 2:44 PM, Zdenek Kabelac <zdenek.kabelac@gmail.com> wrote: > Dne 21.8.2011 20:14, Alexander Lyakas napsal(a): >> Greetings all, >> on stock ubuntu natty, using liblvm 2.02.66, sometimes >> lvm_vg_create_lv_linear () gets stuck in the following stack. >> >> #0 0x00007f3b9636a0f7 in semop () from /lib/x86_64-linux-gnu/libc.so.6 >> #1 0x00007f3b9606863c in dm_udev_wait () from /lib/libdevmapper.so.1.02.1 >> #2 0x00007f3b973df41b in ?? () from /lib/liblvm2app.so.2.2 >> > > dmsetup udevcomplete_all > > this should finish the execution of this command. > >> >> I realize that somehow it is related to udev synchronization. In my >> application, I have a udev monitor for "block" subsystem type, but >> currently it does nothing with the events it receives (it calls >> udev_monitor_receive_device(), udev_device_get_action() and then >> udev_device_unref() for every event. I plan in the future to use it >> for waking up other threads. >> >> Can somebody pls advise on how to investigate this issue. It does not >> happen always. > > > My assumption is - you Debian system is using non-upstream Debian deviation of > udev rules and those are broken (I guess some related discussion might be googled) > > Another issue which is currently being explored is the namespace usage - but I > think this is not related to the problem you are seeing. > > Anyway I'd strongly suggest to use newer lvm package (either build form CVS) > or at least Debian unstable version - as 2.02.66 is very old one. > > Zdenek > > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
