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[dm-devel] 2.6.35 causes deadlock when snapshotting root lv



What:

lvcreate -s -n snap -L 1g vg/root hangs in an unkillable state while
trying to flush the fs and suspend the device to switch tables over to
the snapshot, and no further IO is possible so the system must be hard
booted with magic-sysrq.

Where: 2.6.35, all 3 release candidates.  2.6.34 and earlier kernels are
fine.


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