On Wed, May 20, 2009 at 9:17 PM, Eric Sandeen <sandeen@xxxxxxxxxx> wrote: > Matt LaPlante wrote: >> According to the Ext4 howto >> (http://ext4.wiki.kernel.org/index.php/Ext4_Howto#Converting_an_ext3_filesystem_to_ext4), >> "It is possible to mount both ext3 (and ext2, in kernels 2.6.28 and >> later) filesystems directly using the ext4 filesystem driver." So >> this means, if I'm reading it correctly, that a kernel built with ext4 >> support should be able to mount and manage ext[234] filesystems. Is >> that correct? If so, are there any limitations on this support? >> >> I'm running Ubuntu Jaunty with some custom-built 2.6.29.4 kernels and >> grub2. I seem to have no problem booting from ext4 disks, so the ext4 >> support is definitely there and functioning. I had hoped the ext3 >> support meant I could build the kernel with ext4 only and carry on as >> usual with my ext3 partitions. Unfortunately doing so causes the ext3 >> partitions to fail to boot. So... >> >> booting ext3 with ext3 in the kernel=fine >> booting ext4 with ext4 in the kernel=fine >> booting ext3 with ext4 (only) in the kernel=not fine >> >> Is this a problem or was it never intended to work? > > It should work... > > It'd be more helpful if you could include details on exactly how it > failed, but if Ubuntu builds ext4 as a module, perhaps the initrd > creation sees root as ext3 and doesn't bother to put ext4 in the initrd? ext4 was compiled in directly, it was not a module (this wasn't an ubuntu kernel; it was stock). I can try to get a stack trace with netconsole if it gets far enough to function. > > -Eric > -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
