RE: Can anyone boot a system using btrfs root with linux 3.14 or newer?

Пламен Петров
2014-04-24T17:44:26Z

> -----Original Message-----
> From: Marc MERLIN [mailto:marc@merlins.org]
> Sent: Thursday, April 24, 2014 8:33 PM
> To: Пламен Петров
> Cc: linux-btrfs@vger.kernel.org
> Subject: Re: Can anyone boot a system using btrfs root with linux 3.14 or
> newer?
>
> On Thu, Apr 24, 2014 at 08:19:21PM +0300, Пламен Петров wrote:
> > I just realized that the l gave no way for identifying the particular bugzilla
> entry. Here it is:
> > https://bugzilla.kernel.org/show_bug.cgi?id=74261
>
> Thanks.
>
> But to save us a lot more speculation, can you please try booting a linux
> system (either initrd, or another one with a non btrfs root), and then trying
> to mount that filesystem from the command line?

Using 3.14.1 perhaps?

I will try to do that now, but if I can't manage to do it today - expect the results tomorrow.

One more detail I managed to rule out today is that my problematic filesystems used subvol-other-than-root as default, made like so:

$ mount /dev/sda2 /sda2 -o relatime,compress=zlib,subvol=system-main-fs
$ btrfs subvolume set-default system-main-fs /sda2

Only using different name for the subvolume.
Anyway - its irrelevant.
I formatted a fresh root as BTRFS, skipped the above, and tried booting 3.14.1 - result was kernel panic. So different default subvolume or not - its not the problem.
---------------------------------
Plamen Petrov