On Fri, Dec 05, 2014 at 04:01:37PM +0000, Dimitri John Ledkov wrote: > On 5 December 2014 at 15:32, Chris Mason <clm@xxxxxx> wrote: > > On Sun, Nov 30, 2014 at 5:57 PM, Dimitri John Ledkov <xnox@xxxxxxxxxx> > > wrote: > >> > >> On 30 November 2014 at 22:31, cwillu <cwillu@xxxxxxxxxx> wrote: > >>> > >>> > >>> In ubuntu, the initfs runs a btrfs dev scan, which should catch > >>> anything that would be missed there. > >>> > >> > >> I'm sorry, udev rule(s) is not sufficient in the initramfs-less case, > >> as outlined. > >> > >> In case of booting with initramfs, indeed, both Debian & Ubuntu > >> include snippets there to run btrfs scan. > > > > > > In an initramfs-less system, the root filesystem mount is done by the > > kernel, without calling any mount.btrfs. The mount helper has all the same > > problems that calling btrfs dev scan does, it's just being run by mount. > > > > Sure. in my initramfs-less system case the root filesystem was not > btrfs. Simply there was a btrfs filesystem defined in /etc/fstab. So you could add a 'btrfs dev scan' before the fstab is going to be mounted. Either a local boot script or via some unit file. We're looking for good reasons to justify the existence of the helper, but this is still not enough IMHO. I can see the convenience to do it automatically, but this assumes no udev available which is probably rare these days. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
