On Mon, Oct 27, 2014 at 10:57:59AM +0000, Filipe David Manana wrote:
> > The only thing fancy may be the machine: PowerBook G4 (powerpc 32 bit),
> > running Debian/Linux (stable).
> >
> > The message comes from the newly added fs/btrfs/disk-io.c:
> >
> > if (sb->num_devices > (1UL << 31))
> >      printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n",
> >               sb->num_devices);
> >
> > And 72057594037927936 is 2^56, so maybe there's an endianess problem here?
> 
> Sounds like you need to revert this patch:
> https://patchwork.kernel.org/patch/5004701/ (which ignored endianess)
> or go back to an older kernel (don't use 3.17 or 3.17.1 however, due
> to other serious issues, latest 3.16.x should be safe). There's a v2
> of that patch that fixes the endianess issue, but it didn't make it to
> 3.18-rc1/2 (https://patchwork.kernel.org/patch/5082701/)

Yeah sorry, I sent the v2 too late, here's an incremental that applies
on top of current 3.18-rc

https://patchwork.kernel.org/patch/5160651/
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