Here's an update. I tried the new kernel, and I seem to be having some new (possibly worse problems. In my ssh session, I'm seeing many errors of this sort: Message from syslogd@guru at Jan 26 13:13:14 ... kernel:[ 308.223834] BUG: soft lockup - CPU#0 stuck for 23s! [btrfs-endio-wri:2073] Message from syslogd@guru at Jan 26 13:13:14 ... kernel:[ 308.248754] BUG: soft lockup - CPU#2 stuck for 23s! [btrfs-delalloc-:594] In the logs, I'm seeing several warnings and bugs, including: WARNING: at fs/btrfs/extent_map.c:78 free_extent_map+0x79/0x90 [btrfs]() WARNING: at lib/list_debug.c:62 __list_del_entry+0x82/0xd0() BUG: unable to handle kernel NULL pointer dereference at (null) BUG: soft lockup - CPU#0 stuck for 22s! [btrfs-endio-wri:1489] BUG: soft lockup - CPU#1 stuck for 22s! [btrfs-delalloc-:607] Kernel logs (across a few reboots) are at: http://students.cs.byu.edu/~amcnabb/messages2 -- Andrew McNabb http://www.mcnabbs.org/andrew/ PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html