When I try to umount btrfs filesystem I get always this error with kernel 3.11.4 and 3.11.3, but I can mount and umount without error on kernel 3.11.2. Exact error messages are: BUG: soft lockup - CPU#0 stuck for 23s! [btrfs-transacti:680] BUG: soft lockup - CPU#1 stuck for 23s! [umount:1575] I''m on Fedora 19 I have run scrub and there are no errors: # btrfs scrub status /home scrub status for xxxx scrub started at Tue Oct 22 17:06:16 2013 and finished after 3600 seconds total bytes scrubbed: 117.51GB with 0 errors # btrfs fi df /home Data: total=124.97GB, used=91.54GB System, DUP: total=8.00MB, used=20.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=2.50GB, used=372.85MB Metadata: total=8.00MB, used=0.00 # btrfs fi show Label: none uuid: xxxx Total devices 1 FS bytes used 91.90GB devid 1 size 130.00GB used 130.00GB path /dev/dm-4 Btrfs v0.20-rc1 # df -h /home Filesystem Size Used Avail Use% Mounted on /dev/mapper/fedora-home 130G 93G 34G 74% /home fedora kernel packages: kernel-3.11.2-201.fc19.x86_64.rpm kernel-3.11.3-201.fc19.x86_64.rpm kernel-3.11.4-201.fc19.x86_64.rpm -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html