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[dm-devel] [Fwd: 2.6.10, lockup on lvrename of a snapshot volume]

--- Begin Message --- device-mapper snapshots lock up the kernel if you lvrename the snapshot volume. The original volume has to be mounted for this to happen.

pvcreate /dev/hdb1
vgcreate testvg /dev/hdb1
lvcreate -L10G -n test testvg
mke2fs -j /dev/mapper/testvg-test
mount /dev/mapper/testvg-test /mnt

lvcreate -s -l 128 -n test_backup testvg/test
lvrename testvg test_backup test_backup.tmp

SysRq Trace of lvrename: dm_unplug_all [dm_mod] io_shedule sync_buffer sync_buffer __wait_on_bit out_of_line_wait_on_bit sync_buffer wake_bit_function wake_bit_function sync_dirty_buffer ext3_unlockfs [ext3] thaw_bdev __unlock_fs [dm_mod] dm_resume [dm_mod] do_resume [dm_mod] dev_suspend [dm_mod] ctl_ioctl [dm_mod] sys_ioctl syscall_call

LVM2 version is 2.00.24 (Debian Sarge userland), kernel 2.6.10 from kernel.org. It has been reported that this affects 2.6.9 also, but I have not verified this myself.
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