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Re: [linux-lvm] DM / LVM hangs if snapshot present on kernel v3.0.3



On 02/20/12 18:17, Zdenek Kabelac wrote:
Dne 20.2.2012 16:09, Spelic napsal(a):
On 02/20/12 14:51, Mike Snitzer wrote:
I've never seen this. Which distro are you using?
Ubuntu 11.04  64-bit but with vanilla 3.0.3 kernel

Ubuntu's lvm:
# lvm version
   LVM version:     2.02.66(2) (2010-05-20)
   Library version: 1.02.48 (2010-05-20)

So I'd guess you might be a 'victim' of Debian home-brew udev rules for lvm2,
which were unfortunately not consulted with upstream (nor udev, nor lvm).

Indeed I have had a few bad experiences with Ubuntu's udev rules, but never like this... I don't think a wrong udev rule can hangup the whole machine with such symptoms, you really think so?

- lvs and/or "lvchange --refresh ..." processes hanging forever in kernel code (and AFAIR it was in DM region, that's the /proc/pid/stack trace which I unfortunately lost)

- "sync" also cannot complete, so I can only do force reboot without flush


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