control: retitle 734237 btrfs-tools lockup with 3.12 RT kernel
Hi,
Downgrading btrfs-tools:amd64 from 3.12-1 to 0.19+20130705-3 did not fix
problem upon reboot with the same new linux-image-3.12-1-rt-amd64
kernel.
Every lockup requires me to use power button to shutdown. So I checked
more. Here are the results of these reboots and test runs of obnam:
linux-image btrfs-tools:amd64
NG: ,,-3.12-1-rt-amd64(3.12.6-2) (3.12-1)
NG: ,,-3.12-1-rt-amd64(3.12.6-2) (0.19+20130705-3)
GOOD: ,,-3.11-2-amd64 (3.11.10-1) (0.19+20130705-3)
GOOD: ,,-3.12-1-amd64 (3.12.6-2) (0.19+20130705-3)
GOOD: ,,-3.12-1-amd64 (3.12.6-2) (3.12-1)
NG means btrfs locked up when running obnam to backup.
GOOD means btrfs is working fine even after running obnam to backup.
So btrfs-tools may needs to be updated for RT version of 3.12 or the new
RT kernel is buggy as it looks. For now, current btrfs-tools works with
non-RT kernel 3.12 and that seems to be the easy workaround. (If you
feel this is kernel 3.12 RT bug, please reassign.)
FYI: I have
/dev/sda* (SSD) ext4 for root filesystem etc.
/dev/sdb1 (HDD) btrfs for /mnt/bckup/[@backup]
> 734237: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734237
Osamu
----
$ mount |grep btrfs
/dev/sdb1 on /mnt/backup_history type btrfs (rw,noatime,space_cache)
/dev/sdb1 on /mnt/backup type btrfs (rw,noatime,space_cache)
$ findmnt /mnt/backup
TARGET SOURCE FSTYPE OPTIONS
/mnt/backup /dev/sdb1[/@backup] btrfs rw,noatime,space_cache
$ findmnt /mnt/backup_history
TARGET SOURCE FSTYPE OPTIONS
/mnt/backup_history /dev/sdb1 btrfs rw,noatime,space_cache
$ mount |grep root
/dev/mapper/goofy-root on / type ext4
(rw,noatime,discard,errors=remount-ro,commit=600,data=ordered)
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