Re: btrfs filesystem df not working

[Leonidas Spyropoulos <artafinde@gmail.com>]

On Wed, Oct 13, 2010 at 4:08 PM, Chris Mason <chris.mason@oracle.com> w=
rote:
> On Wed, Oct 13, 2010 at 10:52:57AM +0100, Leonidas Spyropoulos wrote:
>> On Wed, Oct 13, 2010 at 1:43 AM, Chris Mason <chris.mason@oracle.com=
> wrote:
>> > On Tue, Oct 12, 2010 at 02:45:19PM +0100, Leonidas Spyropoulos wro=
te:
>> >> On Tue, Oct 12, 2010 at 2:43 PM, cwillu <cwillu@cwillu.com> wrote=
:
>> >> > On Tue, Oct 12, 2010 at 4:12 AM, Leonidas Spyropoulos
>> >> > <artafinde@gmail.com> wrote:
>> >> >> The above command is not working on my system.
>> >> >> Information:
>> >> >> btrfs f df /media/data
>> >> >
>> >> > btrfs f isn't unique; =A0fi is the minimum to specify "filesyst=
em"
>> >> >
>> >> I tried even with btrfs filesystem df /media/data
>> >> and same results.
>> >
>> > Does strace give us any clues?
>> >
>> According to strace there is inappropriate ioctl for the device.
>> Here is the log
>
> I missed this before:
>
> 2.6.32-5-amd64
>
> The df ioctl was added after 2.6.32 (2.6.33 I think).

So in debian squeeze/unstable which is currently on 2.6.32 (and won't
change any sooner) I cannot use btrfs. All I can do is try
experimental kernels?
My question though is, if I use experimental kernels can I then load
an "old" kernel and still use the btrfs filesystem?
Or the newer kernels write anything specials on ionodes which the old
ones cannot read?

>
> -chris
>



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