[PKG-Openstack-devel] Use of ext2/3, support for sid

[Thomas Goirand]

On 06/25/2015 12:50 AM, Sebastian Pipping wrote:
> Hello!
> 
> 
> I noticed that ext2/3 is being used rather than ext4.  I saw the comment
> "We first use ext2, THEN convert to ext3, because that's so much faster
> this way." but that seems to be about generation time, not the result.

I'd love to use ext4, however, not all kernel support online resize (ie:
resize of an already mounted partition). Wheezy kernel, for example,
doesn't support that with ext4, but it does with ext3.

Probably we should provide an option to use ext4 instead of ext3, and
use eatmydata when using ext4. I'd accept such a patch.

> (On a side not I wonder at what point the conversion to ext3 takes
> place.  At mount (as ext3) time?)

It happens when adding the journal to the ext2 fs (line 419):
tune2fs -j /dev/mapper/${LOOP_DEVICE}

> Also, build-openstack-debian-image does not seem to support sid while it
> would probably be easy to.  Is that on purpose?

It'd be nice to have that indeed. Feel free to propose a patch for it
(after you've tested such a patch).

Cheers,

Thomas Goirand (zigo)