Attempting to snapshot the root lv causes a deadlock in 2.6.35 when it suspends the root lv device to replace the table. The lvcreate -n snap -s -L 1g lv/root command hangs, can not be killed, and no further IO is possible, and the system must be hard booted with magic-sysrq.
Started with Ubuntu 2.6.35-rc3-3 kernel, then tested mainline kernels 2.6.35 rc1, rc2, and rc3 all have the issue. Mainline 2.6.34 does not have the problem. Hopefully I'll be able to do some git bisecting tonight.
Attempting to snapshot the root lv causes a deadlock in 2.6.35 when it suspends the root lv device to replace the table. The lvcreate -n snap -s -L 1g lv/root command hangs, can not be killed, and no further IO is possible, and the system must be hard booted with magic-sysrq.
Started with Ubuntu 2.6.35-rc3-3 kernel, then tested mainline kernels 2.6.35 rc1, rc2, and rc3 all have the issue. Mainline 2.6.34 does not have the problem. Hopefully I'll be able to do some git bisecting tonight.