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xen-devel
Re: [Xen-devel] hanging tapdisk2 processes and improper udev rules
The processes, really? Where do they hang? (check out the wait state --
ps -eopid,wchan:25,cmd or so).
Or do you mean they're stuck waiting for I/Os?
Daniel
They seems to work and to do their job, but they are in a strange state.
For example a ps -aux on dom0 hangs when processing
the line about the tapdisk process, also it cannot be detached from the
vm, and issuing a reboot of the host hangs too (can't kill the process
so it doesn't reboot).
I fighted quite a lot with this on a debian6 + xen 4.1.x box and found
out that disabling the multipath-tools and multipath-tools-boot
corrected the problem (but I need them). I thought that maybe it was
beacause multipathd try to "multipath" the block device
handled by blktap2 and somehow locks it. But it's speculations :)
I do not have the the hands on the box at the moment to give you more
informations and do not want to hijack this thread. It's just that it
looked like the problem I encountered, but I will send you more
informations when I am on the box.
Thanks,
Sébastien
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