Re: "Btrfs: device_list_add() should not update list when mounted" breaks subvol mount

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Hi Johannes,

I've two more systems with kernel version >3.17-rc3
running and no problem like this.

 Does this 3.17-rc3 also has the same type of subvol config
 and it mount operation/sequence as you mentioned ?

> - one hdd with btrfs
> - default subvolume (rootfs) is different from subovlid=0
> - at boot, several subvols are mounted at /home/$DIR

 I ran a few tests, on our mainline
 ----
 mount -o subvol=sv1 /dev/sdh1 /btrfs
 mount /dev/sdh1 /btrfs
  mount: /dev/sdh1 already mounted or /btrfs busy [*]
 mount /dev/sdh1 /btrfs1
 echo $?
 0
 -----

 [*] hope this isn't the problem you are mentioning.

Thanks, Anand
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